Unsuccessful Uplinks - AO-92
I’ve just started playing with talking on satellites. I’m able to hear all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on my Kenwood TH-D74, which I use with my Elk dual band periodic log antenna. However no one can hear me or responds to me. I’ve only been successful with my uplink (being heard) on AO-91 on several passes. I triple checked my frequencies on my radio and the 67 Hz tone and they are set as follows: Sat. Xmit Tone SO-50 145.850 67.0 Hz AO-85 435.170 67.0 Hz AO-91 435.250 67.0 HZ AO-92 435.350 67.0 Hz These are the frequencies used when the bird is at its peak. I adjust for doppler on 440 by starting out 10 khz less, e.g AO-85 435.160, 435.165, 435.170, 435.175, 435.180.
Any ideas if something has changed from what is published or am I missing something? Like I said, i’ve been able to communicate on AO-91.
— Hugo Dominguez, Jr.
You've discovered one of the reasons full duplex is best on the FM sats...you have no idea if you are getting through, because you can't hear while transmitting.
Got another radio so you can work full duplex?
73, Drew KO4MA
-----Original Message----- From: AMSAT-BB [email protected] On Behalf Of Hugo Dominguez, Jr. Sent: Wednesday, June 06, 2018 7:41 PM To: [email protected] Subject: [amsat-bb] Unsuccessful Uplinks - AO-92
I’ve just started playing with talking on satellites. I’m able to hear all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on my Kenwood TH-D74, which I use with my Elk dual band periodic log antenna. However no one can hear me or responds to me. I’ve only been successful with my uplink (being heard) on AO-91 on several passes. I triple checked my frequencies on my radio and the 67 Hz tone and they are set as follows: Sat. Xmit Tone SO-50 145.850 67.0 Hz AO-85 435.170 67.0 Hz AO-91 435.250 67.0 HZ AO-92 435.350 67.0 Hz These are the frequencies used when the bird is at its peak. I adjust for doppler on 440 by starting out 10 khz less, e.g AO-85 435.160, 435.165, 435.170, 435.175, 435.180.
Any ideas if something has changed from what is published or am I missing something? Like I said, i’ve been able to communicate on AO-91.
— Hugo Dominguez, Jr. _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Seems like your Doppler shift might be opposite. I normally start high & work my way down during the satellite pass... (For instance, I would start at 435.180 for AO-85 and then work my way down to 435.160 as the satellite 'sunsets' on my horizon). Doppler shift should be higher frequency during approach, near zero when the satellite is overhead, and lower after the satellite passes.
73,
Daniel, KD7LEE
On Wed, Jun 6, 2018, 17:27 Andrew Glasbrenner [email protected] wrote:
You've discovered one of the reasons full duplex is best on the FM sats...you have no idea if you are getting through, because you can't hear while transmitting.
Got another radio so you can work full duplex?
73, Drew KO4MA
-----Original Message----- From: AMSAT-BB [email protected] On Behalf Of Hugo Dominguez, Jr. Sent: Wednesday, June 06, 2018 7:41 PM To: [email protected] Subject: [amsat-bb] Unsuccessful Uplinks - AO-92
I’ve just started playing with talking on satellites. I’m able to hear all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on my Kenwood TH-D74, which I use with my Elk dual band periodic log antenna. However no one can hear me or responds to me. I’ve only been successful with my uplink (being heard) on AO-91 on several passes. I triple checked my frequencies on my radio and the 67 Hz tone and they are set as follows: Sat. Xmit Tone SO-50 145.850 67.0 Hz AO-85 435.170 67.0 Hz AO-91 435.250 67.0 HZ AO-92 435.350 67.0 Hz These are the frequencies used when the bird is at its peak. I adjust for doppler on 440 by starting out 10 khz less, e.g AO-85 435.160, 435.165, 435.170, 435.175, 435.180.
Any ideas if something has changed from what is published or am I missing something? Like I said, i’ve been able to communicate on AO-91.
— Hugo Dominguez, Jr. _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
This is incorrect. This would be true for V/u but is reverse for U/v as Doppler is making the apparent received frequency at the satellite higher as the satellite is flying towards the ground based transmitter.
73, Gabe AL6D/VE6NJH
On Wed, Jun 6, 2018, 8:14 PM Daniel Wight [email protected] wrote:
Seems like your Doppler shift might be opposite. I normally start high & work my way down during the satellite pass... (For instance, I would start at 435.180 for AO-85 and then work my way down to 435.160 as the satellite 'sunsets' on my horizon). Doppler shift should be higher frequency during approach, near zero when the satellite is overhead, and lower after the satellite passes.
73,
Daniel, KD7LEE
On Wed, Jun 6, 2018, 17:27 Andrew Glasbrenner [email protected] wrote:
You've discovered one of the reasons full duplex is best on the FM sats...you have no idea if you are getting through, because you can't
hear
while transmitting.
Got another radio so you can work full duplex?
73, Drew KO4MA
-----Original Message----- From: AMSAT-BB [email protected] On Behalf Of Hugo Dominguez, Jr. Sent: Wednesday, June 06, 2018 7:41 PM To: [email protected] Subject: [amsat-bb] Unsuccessful Uplinks - AO-92
I’ve just started playing with talking on satellites. I’m able to hear
all
the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on
my
Kenwood TH-D74, which I use with my Elk dual band periodic log antenna. However no one can hear me or responds to me. I’ve only been successful with my uplink (being heard) on AO-91 on several passes. I triple checked my frequencies on my radio and the 67 Hz tone and they are set as
follows:
Sat. Xmit Tone SO-50 145.850 67.0 Hz AO-85 435.170 67.0 Hz AO-91 435.250 67.0 HZ AO-92 435.350 67.0 Hz These are the frequencies used when the bird is at its peak. I adjust for doppler on 440 by starting out 10 khz less, e.g AO-85 435.160, 435.165, 435.170, 435.175, 435.180.
Any ideas if something has changed from what is published or am I missing something? Like I said, i’ve been able to communicate on AO-91.
— Hugo Dominguez, Jr. _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite
program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership.
Opinions
expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite
program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Thanks. All the web pages I read said to perform doppler shift by starting 10 kHz below and work your way up. Even this amsat website has instructions to do it how I am doing it: https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/
I also just noticed that there is a schedule for the L-band for uplink which i’m interpreting that UHF won’t work when the bird is setup for the L-band for uplink. Maybe I was trying to make contact when it was on the L band.
— Hugo Dominguez, Jr.
On Jun 6, 2018, at 21:07, Daniel Wight [email protected] wrote:
Seems like your Doppler shift might be opposite. I normally start high & work my way down during the satellite pass... (For instance, I would start at 435.180 for AO-85 and then work my way down to 435.160 as the satellite 'sunsets' on my horizon). Doppler shift should be higher frequency during approach, near zero when the satellite is overhead, and lower after the satellite passes.
73,
Daniel, KD7LEE
On Wed, Jun 6, 2018, 17:27 Andrew Glasbrenner [email protected] wrote: You've discovered one of the reasons full duplex is best on the FM sats...you have no idea if you are getting through, because you can't hear while transmitting.
Got another radio so you can work full duplex?
73, Drew KO4MA
-----Original Message----- From: AMSAT-BB [email protected] On Behalf Of Hugo Dominguez, Jr. Sent: Wednesday, June 06, 2018 7:41 PM To: [email protected] Subject: [amsat-bb] Unsuccessful Uplinks - AO-92
I’ve just started playing with talking on satellites. I’m able to hear all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on my Kenwood TH-D74, which I use with my Elk dual band periodic log antenna. However no one can hear me or responds to me. I’ve only been successful with my uplink (being heard) on AO-91 on several passes. I triple checked my frequencies on my radio and the 67 Hz tone and they are set as follows: Sat. Xmit Tone SO-50 145.850 67.0 Hz AO-85 435.170 67.0 Hz AO-91 435.250 67.0 HZ AO-92 435.350 67.0 Hz These are the frequencies used when the bird is at its peak. I adjust for doppler on 440 by starting out 10 khz less, e.g AO-85 435.160, 435.165, 435.170, 435.175, 435.180.
Any ideas if something has changed from what is published or am I missing something? Like I said, i’ve been able to communicate on AO-91.
— Hugo Dominguez, Jr. _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
As Gabe pointed out, I may have this backwards as I started out on SO-50 (V/U) & then applied my original techniques to the Fox (U/V) birds in error (i.e. your initial settings are probably correct). I need to do some more research before I understand this fully, but it looks like I've been using the wrong uplink frequencies on my IC-W32A. My apologies for the mistake. Looks like I'll be reprogramming my radio soon....
73,
Daniel, KD7LEE
On Wed, Jun 6, 2018, 21:50 Hugo Dominguez, Jr. [email protected] wrote:
Thanks. All the web pages I read said to perform doppler shift by starting 10 kHz below and work your way up. Even this amsat website has instructions to do it how I am doing it: https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/
I also just noticed that there is a schedule for the L-band for uplink which i’m interpreting that UHF won’t work when the bird is setup for the L-band for uplink. Maybe I was trying to make contact when it was on the L band.
— Hugo Dominguez, Jr.
On Jun 6, 2018, at 21:07, Daniel Wight [email protected] wrote:
Seems like your Doppler shift might be opposite. I normally start high & work my way down during the satellite pass... (For instance, I would start at 435.180 for AO-85 and then work my way down to 435.160 as the satellite 'sunsets' on my horizon). Doppler shift should be higher frequency during approach, near zero when the satellite is overhead, and lower after the satellite passes.
73,
Daniel, KD7LEE
On Wed, Jun 6, 2018, 17:27 Andrew Glasbrenner [email protected] wrote:
You've discovered one of the reasons full duplex is best on the FM sats...you have no idea if you are getting through, because you can't hear while transmitting.
Got another radio so you can work full duplex?
73, Drew KO4MA
-----Original Message----- From: AMSAT-BB [email protected] On Behalf Of Hugo Dominguez, Jr. Sent: Wednesday, June 06, 2018 7:41 PM To: [email protected] Subject: [amsat-bb] Unsuccessful Uplinks - AO-92
I’ve just started playing with talking on satellites. I’m able to hear all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on my Kenwood TH-D74, which I use with my Elk dual band periodic log antenna. However no one can hear me or responds to me. I’ve only been successful with my uplink (being heard) on AO-91 on several passes. I triple checked my frequencies on my radio and the 67 Hz tone and they are set as follows: Sat. Xmit Tone SO-50 145.850 67.0 Hz AO-85 435.170 67.0 Hz AO-91 435.250 67.0 HZ AO-92 435.350 67.0 Hz These are the frequencies used when the bird is at its peak. I adjust for doppler on 440 by starting out 10 khz less, e.g AO-85 435.160, 435.165, 435.170, 435.175, 435.180.
Any ideas if something has changed from what is published or am I missing something? Like I said, i’ve been able to communicate on AO-91.
— Hugo Dominguez, Jr. _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Someone mentioned to me that AO-91 was made to be worked by handhelds. They also mentioned that AO-85 actually has a damaged receive antenna and that you need more power. Is that correct? Is 5 watts sufficient for AO-92, AO-85 and SO-50?
— Hugo Dominguez, Jr.
On Jun 6, 2018, at 23:08, Daniel Wight [email protected] wrote:
As Gabe pointed out, I may have this backwards as I started out on SO-50 (V/U) & then applied my original techniques to the Fox (U/V) birds in error (i.e. your initial settings are probably correct). I need to do some more research before I understand this fully, but it looks like I've been using the wrong uplink frequencies on my IC-W32A. My apologies for the mistake. Looks like I'll be reprogramming my radio soon....
73,
Daniel, KD7LEE
On Wed, Jun 6, 2018, 21:50 Hugo Dominguez, Jr. [email protected] wrote: Thanks. All the web pages I read said to perform doppler shift by starting 10 kHz below and work your way up. Even this amsat website has instructions to do it how I am doing it: https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/
I also just noticed that there is a schedule for the L-band for uplink which i’m interpreting that UHF won’t work when the bird is setup for the L-band for uplink. Maybe I was trying to make contact when it was on the L band.
— Hugo Dominguez, Jr.
On Jun 6, 2018, at 21:07, Daniel Wight [email protected] wrote:
Seems like your Doppler shift might be opposite. I normally start high & work my way down during the satellite pass... (For instance, I would start at 435.180 for AO-85 and then work my way down to 435.160 as the satellite 'sunsets' on my horizon). Doppler shift should be higher frequency during approach, near zero when the satellite is overhead, and lower after the satellite passes.
73,
Daniel, KD7LEE
On Wed, Jun 6, 2018, 17:27 Andrew Glasbrenner [email protected] wrote: You've discovered one of the reasons full duplex is best on the FM sats...you have no idea if you are getting through, because you can't hear while transmitting.
Got another radio so you can work full duplex?
73, Drew KO4MA
-----Original Message----- From: AMSAT-BB [email protected] On Behalf Of Hugo Dominguez, Jr. Sent: Wednesday, June 06, 2018 7:41 PM To: [email protected] Subject: [amsat-bb] Unsuccessful Uplinks - AO-92
I’ve just started playing with talking on satellites. I’m able to hear all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on my Kenwood TH-D74, which I use with my Elk dual band periodic log antenna. However no one can hear me or responds to me. I’ve only been successful with my uplink (being heard) on AO-91 on several passes. I triple checked my frequencies on my radio and the 67 Hz tone and they are set as follows: Sat. Xmit Tone SO-50 145.850 67.0 Hz AO-85 435.170 67.0 Hz AO-91 435.250 67.0 HZ AO-92 435.350 67.0 Hz These are the frequencies used when the bird is at its peak. I adjust for doppler on 440 by starting out 10 khz less, e.g AO-85 435.160, 435.165, 435.170, 435.175, 435.180.
Any ideas if something has changed from what is published or am I missing something? Like I said, i’ve been able to communicate on AO-91.
— Hugo Dominguez, Jr. _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Hugo,
Just to share experience.
3B8GZ (not on the BB, but in copy) is working very well AO-91 and AO92, crystal clear above 10 deg. ele. with 2 Baofengs and a home brew Arrow type of antenna while on the beach this side of the globe. He made QSO’s with South Africa, Madagascar and locals with less than 4W.
SO-50 is a little more tricky as a 74Hz CTCSS required to trigger the repeater, then you need to switch CTCSS to 67Hz to QSO. Also it need a few more W for clear QSO.
AO-85 is quite hard-hearing and depending on its path you need between 15 and 50 W with a 10-15 ele yagi to go through reasonably.
Hope this help.
73
Jean Marc (3B8DU)
On Jun 7, 2018, at 9:04 PM, Hugo Dominguez, Jr. [email protected] wrote:
Someone mentioned to me that AO-91 was made to be worked by handhelds. They also mentioned that AO-85 actually has a damaged receive antenna and that you need more power. Is that correct? Is 5 watts sufficient for AO-92, AO-85 and SO-50?
— Hugo Dominguez, Jr.
On Jun 6, 2018, at 23:08, Daniel Wight [email protected] wrote:
As Gabe pointed out, I may have this backwards as I started out on SO-50 (V/U) & then applied my original techniques to the Fox (U/V) birds in error (i.e. your initial settings are probably correct). I need to do some more research before I understand this fully, but it looks like I've been using the wrong uplink frequencies on my IC-W32A. My apologies for the mistake. Looks like I'll be reprogramming my radio soon....
73,
Daniel, KD7LEE
On Wed, Jun 6, 2018, 21:50 Hugo Dominguez, Jr. [email protected] wrote: Thanks. All the web pages I read said to perform doppler shift by starting 10 kHz below and work your way up. Even this amsat website has instructions to do it how I am doing it: https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/
I also just noticed that there is a schedule for the L-band for uplink which i’m interpreting that UHF won’t work when the bird is setup for the L-band for uplink. Maybe I was trying to make contact when it was on the L band.
— Hugo Dominguez, Jr.
On Jun 6, 2018, at 21:07, Daniel Wight [email protected] wrote:
Seems like your Doppler shift might be opposite. I normally start high & work my way down during the satellite pass... (For instance, I would start at 435.180 for AO-85 and then work my way down to 435.160 as the satellite 'sunsets' on my horizon). Doppler shift should be higher frequency during approach, near zero when the satellite is overhead, and lower after the satellite passes.
73,
Daniel, KD7LEE
On Wed, Jun 6, 2018, 17:27 Andrew Glasbrenner [email protected] wrote: You've discovered one of the reasons full duplex is best on the FM sats...you have no idea if you are getting through, because you can't hear while transmitting.
Got another radio so you can work full duplex?
73, Drew KO4MA
-----Original Message----- From: AMSAT-BB [email protected] On Behalf Of Hugo Dominguez, Jr. Sent: Wednesday, June 06, 2018 7:41 PM To: [email protected] Subject: [amsat-bb] Unsuccessful Uplinks - AO-92
I’ve just started playing with talking on satellites. I’m able to hear all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on my Kenwood TH-D74, which I use with my Elk dual band periodic log antenna. However no one can hear me or responds to me. I’ve only been successful with my uplink (being heard) on AO-91 on several passes. I triple checked my frequencies on my radio and the 67 Hz tone and they are set as follows: Sat. Xmit Tone SO-50 145.850 67.0 Hz AO-85 435.170 67.0 Hz AO-91 435.250 67.0 HZ AO-92 435.350 67.0 Hz These are the frequencies used when the bird is at its peak. I adjust for doppler on 440 by starting out 10 khz less, e.g AO-85 435.160, 435.165, 435.170, 435.175, 435.180.
Any ideas if something has changed from what is published or am I missing something? Like I said, i’ve been able to communicate on AO-91.
— Hugo Dominguez, Jr. _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Thanks for the feedback. I’ll keep trying. Is the Baofang being used the 5 watt or 8 watt version? Right now it is hard holding two radios and the antenna. Maybe I can strap it to my antenna and use it for listening for myself. I should also look at mounting my antenna to an old camera tripod to free my hand
— Hugo Dominguez, Jr.
On Jun 7, 2018, at 10:30, Jean Marc Momple [email protected] wrote:
Hugo,
Just to share experience.
3B8GZ (not on the BB, but in copy) is working very well AO-91 and AO92, crystal clear above 10 deg. ele. with 2 Baofengs and a home brew Arrow type of antenna while on the beach this side of the globe. He made QSO’s with South Africa, Madagascar and locals with less than 4W.
SO-50 is a little more tricky as a 74Hz CTCSS required to trigger the repeater, then you need to switch CTCSS to 67Hz to QSO. Also it need a few more W for clear QSO.
AO-85 is quite hard-hearing and depending on its path you need between 15 and 50 W with a 10-15 ele yagi to go through reasonably.
Hope this help.
73
Jean Marc (3B8DU)
On Jun 7, 2018, at 9:04 PM, Hugo Dominguez, Jr. [email protected] wrote:
Someone mentioned to me that AO-91 was made to be worked by handhelds. They also mentioned that AO-85 actually has a damaged receive antenna and that you need more power. Is that correct? Is 5 watts sufficient for AO-92, AO-85 and SO-50?
— Hugo Dominguez, Jr.
On Jun 6, 2018, at 23:08, Daniel Wight [email protected] wrote:
As Gabe pointed out, I may have this backwards as I started out on SO-50 (V/U) & then applied my original techniques to the Fox (U/V) birds in error (i.e. your initial settings are probably correct). I need to do some more research before I understand this fully, but it looks like I've been using the wrong uplink frequencies on my IC-W32A. My apologies for the mistake. Looks like I'll be reprogramming my radio soon....
73,
Daniel, KD7LEE
On Wed, Jun 6, 2018, 21:50 Hugo Dominguez, Jr. [email protected] wrote: Thanks. All the web pages I read said to perform doppler shift by starting 10 kHz below and work your way up. Even this amsat website has instructions to do it how I am doing it: https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/
I also just noticed that there is a schedule for the L-band for uplink which i’m interpreting that UHF won’t work when the bird is setup for the L-band for uplink. Maybe I was trying to make contact when it was on the L band.
— Hugo Dominguez, Jr.
On Jun 6, 2018, at 21:07, Daniel Wight [email protected] wrote:
Seems like your Doppler shift might be opposite. I normally start high & work my way down during the satellite pass... (For instance, I would start at 435.180 for AO-85 and then work my way down to 435.160 as the satellite 'sunsets' on my horizon). Doppler shift should be higher frequency during approach, near zero when the satellite is overhead, and lower after the satellite passes.
73,
Daniel, KD7LEE
On Wed, Jun 6, 2018, 17:27 Andrew Glasbrenner [email protected] wrote: You've discovered one of the reasons full duplex is best on the FM sats...you have no idea if you are getting through, because you can't hear while transmitting.
Got another radio so you can work full duplex?
73, Drew KO4MA
-----Original Message----- From: AMSAT-BB [email protected] On Behalf Of Hugo Dominguez, Jr. Sent: Wednesday, June 06, 2018 7:41 PM To: [email protected] Subject: [amsat-bb] Unsuccessful Uplinks - AO-92
I’ve just started playing with talking on satellites. I’m able to hear all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on my Kenwood TH-D74, which I use with my Elk dual band periodic log antenna. However no one can hear me or responds to me. I’ve only been successful with my uplink (being heard) on AO-91 on several passes. I triple checked my frequencies on my radio and the 67 Hz tone and they are set as follows: Sat. Xmit Tone SO-50 145.850 67.0 Hz AO-85 435.170 67.0 Hz AO-91 435.250 67.0 HZ AO-92 435.350 67.0 Hz These are the frequencies used when the bird is at its peak. I adjust for doppler on 440 by starting out 10 khz less, e.g AO-85 435.160, 435.165, 435.170, 435.175, 435.180.
Any ideas if something has changed from what is published or am I missing something? Like I said, i’ve been able to communicate on AO-91.
— Hugo Dominguez, Jr. _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Hugo,
Actually the Baofengs UR-5R that Francois is using are transmitting with only 2 watts on 70cm. Works very well. Sorry for having stated 4W (Vhf power)
I will send you separately a small presentation I did for the local OM’s which trigger Francois venture on the birds.
73
Jean Marc
On Jun 7, 2018, at 9:41 PM, Hugo Dominguez, Jr. [email protected] wrote:
Thanks for the feedback. I’ll keep trying. Is the Baofang being used the 5 watt or 8 watt version? Right now it is hard holding two radios and the antenna. Maybe I can strap it to my antenna and use it for listening for myself. I should also look at mounting my antenna to an old camera tripod to free my hand
— Hugo Dominguez, Jr.
On Jun 7, 2018, at 10:30, Jean Marc Momple [email protected] wrote:
Hugo,
Just to share experience.
3B8GZ (not on the BB, but in copy) is working very well AO-91 and AO92, crystal clear above 10 deg. ele. with 2 Baofengs and a home brew Arrow type of antenna while on the beach this side of the globe. He made QSO’s with South Africa, Madagascar and locals with less than 4W.
SO-50 is a little more tricky as a 74Hz CTCSS required to trigger the repeater, then you need to switch CTCSS to 67Hz to QSO. Also it need a few more W for clear QSO.
AO-85 is quite hard-hearing and depending on its path you need between 15 and 50 W with a 10-15 ele yagi to go through reasonably.
Hope this help.
73
Jean Marc (3B8DU)
On Jun 7, 2018, at 9:04 PM, Hugo Dominguez, Jr. [email protected] wrote:
Someone mentioned to me that AO-91 was made to be worked by handhelds. They also mentioned that AO-85 actually has a damaged receive antenna and that you need more power. Is that correct? Is 5 watts sufficient for AO-92, AO-85 and SO-50?
— Hugo Dominguez, Jr.
On Jun 6, 2018, at 23:08, Daniel Wight [email protected] wrote:
As Gabe pointed out, I may have this backwards as I started out on SO-50 (V/U) & then applied my original techniques to the Fox (U/V) birds in error (i.e. your initial settings are probably correct). I need to do some more research before I understand this fully, but it looks like I've been using the wrong uplink frequencies on my IC-W32A. My apologies for the mistake. Looks like I'll be reprogramming my radio soon....
73,
Daniel, KD7LEE
On Wed, Jun 6, 2018, 21:50 Hugo Dominguez, Jr. [email protected] wrote: Thanks. All the web pages I read said to perform doppler shift by starting 10 kHz below and work your way up. Even this amsat website has instructions to do it how I am doing it: https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/
I also just noticed that there is a schedule for the L-band for uplink which i’m interpreting that UHF won’t work when the bird is setup for the L-band for uplink. Maybe I was trying to make contact when it was on the L band.
— Hugo Dominguez, Jr.
On Jun 6, 2018, at 21:07, Daniel Wight [email protected] wrote:
Seems like your Doppler shift might be opposite. I normally start high & work my way down during the satellite pass... (For instance, I would start at 435.180 for AO-85 and then work my way down to 435.160 as the satellite 'sunsets' on my horizon). Doppler shift should be higher frequency during approach, near zero when the satellite is overhead, and lower after the satellite passes.
73,
Daniel, KD7LEE
> On Wed, Jun 6, 2018, 17:27 Andrew Glasbrenner [email protected] wrote: > You've discovered one of the reasons full duplex is best on the FM sats...you have no idea if you are getting through, because you can't hear while transmitting. > > Got another radio so you can work full duplex? > > 73, Drew KO4MA > > -----Original Message----- > From: AMSAT-BB [email protected] On Behalf Of Hugo Dominguez, Jr. > Sent: Wednesday, June 06, 2018 7:41 PM > To: [email protected] > Subject: [amsat-bb] Unsuccessful Uplinks - AO-92 > > I’ve just started playing with talking on satellites. I’m able to hear all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on my Kenwood TH-D74, which I use with my Elk dual band periodic log antenna. However no one can hear me or responds to me. I’ve only been successful with my uplink (being heard) on AO-91 on several passes. I triple checked my frequencies on my radio and the 67 Hz tone and they are set as follows: > Sat. Xmit Tone > SO-50 145.850 67.0 Hz > AO-85 435.170 67.0 Hz > AO-91 435.250 67.0 HZ > AO-92 435.350 67.0 Hz > These are the frequencies used when the bird is at its peak. I adjust for doppler on 440 by starting out 10 khz less, e.g AO-85 435.160, 435.165, 435.170, 435.175, 435.180. > > Any ideas if something has changed from what is published or am I missing something? Like I said, i’ve been able to communicate on AO-91. > > — > Hugo Dominguez, Jr. > _______________________________________________ > Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb > > _______________________________________________ > Sent via [email protected]. AMSAT-NA makes this open forum available > to all interested persons worldwide without requiring membership. Opinions expressed > are solely those of the author, and do not reflect the official views of AMSAT-NA. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
My FM operating is has been dual HTs and portable, I.E. not tripod, no table, just me and what I can hold. I am working on a SSB setup but only tried it a few times thus far, but that includes a backpack.
Yes, holding 2 radios and an antenna is difficult at best, and risky for the equipment. That is why I took the suggestion to use a piece of wood in the end of my Arrow to mount the RX radio to. This was a major improvement in the setup. Pictures and credit for the ideas are available at hamqth.com/KB2YSI
SO-50 has been my go to satellite and 5w has worked very well for me. AO-85 is my unicorn, sometimes I have no issues getting in, others nothing I do seems to work. My money is on operater error. Hihi. AO-91 & AO-92 are crazy easy to use once I had a full duplex (using 2 radios and a duplexer as a filter) setup.
I am still new, have not been operating a year yet, but am willing to talk offline if anyone is interested. I may have learned a lot the hard way, but it has been incredibly fun time!
73, Don KB2YSI
On Thu, Jun 7, 2018, 14:03 Jean Marc Momple [email protected] wrote:
Hugo,
Actually the Baofengs UR-5R that Francois is using are transmitting with only 2 watts on 70cm. Works very well. Sorry for having stated 4W (Vhf power)
I will send you separately a small presentation I did for the local OM’s which trigger Francois venture on the birds.
73
Jean Marc
On Jun 7, 2018, at 9:41 PM, Hugo Dominguez, Jr. [email protected]
wrote:
Thanks for the feedback. I’ll keep trying. Is the Baofang being used the
5 watt or 8 watt version? Right now it is hard holding two radios and the antenna. Maybe I can strap it to my antenna and use it for listening for myself. I should also look at mounting my antenna to an old camera tripod to free my hand
— Hugo Dominguez, Jr.
On Jun 7, 2018, at 10:30, Jean Marc Momple [email protected]
wrote:
Hugo,
Just to share experience.
3B8GZ (not on the BB, but in copy) is working very well AO-91 and AO92,
crystal clear above 10 deg. ele. with 2 Baofengs and a home brew Arrow type of antenna while on the beach this side of the globe. He made QSO’s with South Africa, Madagascar and locals with less than 4W.
SO-50 is a little more tricky as a 74Hz CTCSS required to trigger the
repeater, then you need to switch CTCSS to 67Hz to QSO. Also it need a few more W for clear QSO.
AO-85 is quite hard-hearing and depending on its path you need between
15 and 50 W with a 10-15 ele yagi to go through reasonably.
Hope this help.
73
Jean Marc (3B8DU)
On Jun 7, 2018, at 9:04 PM, Hugo Dominguez, Jr. [email protected]
wrote:
Someone mentioned to me that AO-91 was made to be worked by handhelds.
They also mentioned that AO-85 actually has a damaged receive antenna and that you need more power. Is that correct? Is 5 watts sufficient for AO-92, AO-85 and SO-50?
— Hugo Dominguez, Jr.
On Jun 6, 2018, at 23:08, Daniel Wight [email protected] wrote:
As Gabe pointed out, I may have this backwards as I started out on
SO-50 (V/U) & then applied my original techniques to the Fox (U/V) birds in error (i.e. your initial settings are probably correct). I need to do some more research before I understand this fully, but it looks like I've been using the wrong uplink frequencies on my IC-W32A. My apologies for the mistake. Looks like I'll be reprogramming my radio soon....
73,
Daniel, KD7LEE
On Wed, Jun 6, 2018, 21:50 Hugo Dominguez, Jr. [email protected]
wrote:
Thanks. All the web pages I read said to perform doppler shift by
starting 10 kHz below and work your way up. Even this amsat website has instructions to do it how I am doing it: https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/
I also just noticed that there is a schedule for the L-band for
uplink which i’m interpreting that UHF won’t work when the bird is setup for the L-band for uplink. Maybe I was trying to make contact when it was on the L band.
— Hugo Dominguez, Jr.
> On Jun 6, 2018, at 21:07, Daniel Wight [email protected] wrote: > > Seems like your Doppler shift might be opposite. I normally start
high & work my way down during the satellite pass... (For instance, I would start at 435.180 for AO-85 and then work my way down to 435.160 as the satellite 'sunsets' on my horizon). Doppler shift should be higher frequency during approach, near zero when the satellite is overhead, and lower after the satellite passes.
> > 73, > > Daniel, KD7LEE > >> On Wed, Jun 6, 2018, 17:27 Andrew Glasbrenner <
[email protected]> wrote:
>> You've discovered one of the reasons full duplex is best on the FM
sats...you have no idea if you are getting through, because you can't hear while transmitting.
>> >> Got another radio so you can work full duplex? >> >> 73, Drew KO4MA >> >> -----Original Message----- >> From: AMSAT-BB [email protected] On Behalf Of Hugo
Dominguez, Jr.
>> Sent: Wednesday, June 06, 2018 7:41 PM >> To: [email protected] >> Subject: [amsat-bb] Unsuccessful Uplinks - AO-92 >> >> I’ve just started playing with talking on satellites. I’m able to
hear all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on my Kenwood TH-D74, which I use with my Elk dual band periodic log antenna. However no one can hear me or responds to me. I’ve only been successful with my uplink (being heard) on AO-91 on several passes. I triple checked my frequencies on my radio and the 67 Hz tone and they are set as follows:
>> Sat. Xmit Tone >> SO-50 145.850 67.0 Hz >> AO-85 435.170 67.0 Hz >> AO-91 435.250 67.0 HZ >> AO-92 435.350 67.0 Hz >> These are the frequencies used when the bird is at its peak. I
adjust for doppler on 440 by starting out 10 khz less, e.g AO-85 435.160, 435.165, 435.170, 435.175, 435.180.
>> >> Any ideas if something has changed from what is published or am I
missing something? Like I said, i’ve been able to communicate on AO-91.
>> >> — >> Hugo Dominguez, Jr. >> _______________________________________________ >> Sent via [email protected]. AMSAT-NA makes this open forum
available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite
program!
>> Subscription settings:
http://www.amsat.org/mailman/listinfo/amsat-bb
>> >> _______________________________________________ >> Sent via [email protected]. AMSAT-NA makes this open forum
available
>> to all interested persons worldwide without requiring membership.
Opinions expressed
>> are solely those of the author, and do not reflect the official
views of AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite
program!
>> Subscription settings:
http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership.
Opinions expressed
are solely those of the author, and do not reflect the official views
of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite
program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
It was suggested that you need "a few more watts" to use SO-50. That is definitely not the case. I have worked it many times with only 500 mW, even on busy passes, getting in full-quieting. I have also gotten into it with an acceptable signal with only 50 mW on empty relatively high elevation passes. It does has a relatively weak downlink though (250 mW).
Regarding AO-85, it is a little deaf and it's true it's because of an antenna issue. I have some info about it and a "twist trick" fix documented here:
https://spacecomms.wordpress.com/ao-85-twist-trick-and-other-hints/
73, John Brier KG4AKV
On Thu, Jun 7, 2018 at 2:57 PM, Don KB2YSI [email protected] wrote:
My FM operating is has been dual HTs and portable, I.E. not tripod, no table, just me and what I can hold. I am working on a SSB setup but only tried it a few times thus far, but that includes a backpack.
Yes, holding 2 radios and an antenna is difficult at best, and risky for the equipment. That is why I took the suggestion to use a piece of wood in the end of my Arrow to mount the RX radio to. This was a major improvement in the setup. Pictures and credit for the ideas are available at hamqth.com/KB2YSI
SO-50 has been my go to satellite and 5w has worked very well for me. AO-85 is my unicorn, sometimes I have no issues getting in, others nothing I do seems to work. My money is on operater error. Hihi. AO-91 & AO-92 are crazy easy to use once I had a full duplex (using 2 radios and a duplexer as a filter) setup.
I am still new, have not been operating a year yet, but am willing to talk offline if anyone is interested. I may have learned a lot the hard way, but it has been incredibly fun time!
73, Don KB2YSI
On Thu, Jun 7, 2018, 14:03 Jean Marc Momple [email protected] wrote:
Hugo,
Actually the Baofengs UR-5R that Francois is using are transmitting with only 2 watts on 70cm. Works very well. Sorry for having stated 4W (Vhf power)
I will send you separately a small presentation I did for the local OM’s which trigger Francois venture on the birds.
73
Jean Marc
On Jun 7, 2018, at 9:41 PM, Hugo Dominguez, Jr. [email protected]
wrote:
Thanks for the feedback. I’ll keep trying. Is the Baofang being used
the
5 watt or 8 watt version? Right now it is hard holding two radios and the antenna. Maybe I can strap it to my antenna and use it for listening for myself. I should also look at mounting my antenna to an old camera tripod to free my hand
— Hugo Dominguez, Jr.
On Jun 7, 2018, at 10:30, Jean Marc Momple <
wrote:
Hugo,
Just to share experience.
3B8GZ (not on the BB, but in copy) is working very well AO-91 and
AO92,
crystal clear above 10 deg. ele. with 2 Baofengs and a home brew Arrow
type
of antenna while on the beach this side of the globe. He made QSO’s with South Africa, Madagascar and locals with less than 4W.
SO-50 is a little more tricky as a 74Hz CTCSS required to trigger the
repeater, then you need to switch CTCSS to 67Hz to QSO. Also it need a
few
more W for clear QSO.
AO-85 is quite hard-hearing and depending on its path you need between
15 and 50 W with a 10-15 ele yagi to go through reasonably.
Hope this help.
73
Jean Marc (3B8DU)
On Jun 7, 2018, at 9:04 PM, Hugo Dominguez, Jr. [email protected]
wrote:
Someone mentioned to me that AO-91 was made to be worked by
handhelds.
They also mentioned that AO-85 actually has a damaged receive antenna and that you need more power. Is that correct? Is 5 watts sufficient for
AO-92,
AO-85 and SO-50?
— Hugo Dominguez, Jr.
On Jun 6, 2018, at 23:08, Daniel Wight [email protected] wrote:
As Gabe pointed out, I may have this backwards as I started out on
SO-50 (V/U) & then applied my original techniques to the Fox (U/V) birds
in
error (i.e. your initial settings are probably correct). I need to do
some
more research before I understand this fully, but it looks like I've been using the wrong uplink frequencies on my IC-W32A. My apologies for the mistake. Looks like I'll be reprogramming my radio soon....
73,
Daniel, KD7LEE
> On Wed, Jun 6, 2018, 21:50 Hugo Dominguez, Jr. [email protected]
wrote:
> Thanks. All the web pages I read said to perform doppler shift by
starting 10 kHz below and work your way up. Even this amsat website has instructions to do it how I am doing it: https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/
> > I also just noticed that there is a schedule for the L-band for
uplink which i’m interpreting that UHF won’t work when the bird is setup for the L-band for uplink. Maybe I was trying to make contact when it was on the L band.
> > — > Hugo Dominguez, Jr. > >> On Jun 6, 2018, at 21:07, Daniel Wight [email protected] wrote: >> >> Seems like your Doppler shift might be opposite. I normally start
high & work my way down during the satellite pass... (For instance, I
would
start at 435.180 for AO-85 and then work my way down to 435.160 as the satellite 'sunsets' on my horizon). Doppler shift should be higher frequency during approach, near zero when the satellite is overhead, and lower after the satellite passes.
>> >> 73, >> >> Daniel, KD7LEE >> >>> On Wed, Jun 6, 2018, 17:27 Andrew Glasbrenner <
[email protected]> wrote:
>>> You've discovered one of the reasons full duplex is best on the
FM
sats...you have no idea if you are getting through, because you can't
hear
while transmitting.
>>> >>> Got another radio so you can work full duplex? >>> >>> 73, Drew KO4MA >>> >>> -----Original Message----- >>> From: AMSAT-BB [email protected] On Behalf Of Hugo
Dominguez, Jr.
>>> Sent: Wednesday, June 06, 2018 7:41 PM >>> To: [email protected] >>> Subject: [amsat-bb] Unsuccessful Uplinks - AO-92 >>> >>> I’ve just started playing with talking on satellites. I’m able to
hear all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on my Kenwood TH-D74, which I use with my Elk dual band
periodic
log antenna. However no one can hear me or responds to me. I’ve only been successful with my uplink (being heard) on AO-91 on several passes. I triple checked my frequencies on my radio and the 67 Hz tone and they are set as follows:
>>> Sat. Xmit Tone >>> SO-50 145.850 67.0 Hz >>> AO-85 435.170 67.0 Hz >>> AO-91 435.250 67.0 HZ >>> AO-92 435.350 67.0 Hz >>> These are the frequencies used when the bird is at its peak. I
adjust for doppler on 440 by starting out 10 khz less, e.g AO-85 435.160, 435.165, 435.170, 435.175, 435.180.
>>> >>> Any ideas if something has changed from what is published or am I
missing something? Like I said, i’ve been able to communicate on AO-91.
>>> >>> — >>> Hugo Dominguez, Jr. >>> _______________________________________________ >>> Sent via [email protected]. AMSAT-NA makes this open forum
available to all interested persons worldwide without requiring
membership.
Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA.
>>> Not an AMSAT-NA member? Join now to support the amateur satellite
program!
>>> Subscription settings:
http://www.amsat.org/mailman/listinfo/amsat-bb
>>> >>> _______________________________________________ >>> Sent via [email protected]. AMSAT-NA makes this open forum
available
>>> to all interested persons worldwide without requiring membership.
Opinions expressed
>>> are solely those of the author, and do not reflect the official
views of AMSAT-NA.
>>> Not an AMSAT-NA member? Join now to support the amateur satellite
program!
>>> Subscription settings:
http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum
available
to all interested persons worldwide without requiring membership.
Opinions expressed
are solely those of the author, and do not reflect the official views
of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite
program!
Subscription settings: http://www.amsat.org/mailman/
listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership.
Opinions
expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite
program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Hugo,
As regards SO-50:
The advices of John (KG2YSI) are much more relevant than mine as he is an expert in portable satellite work and have made many successful demonstrations of same, more experience than me with portable work anyway as being a time to time portable OP.
I was never successful to work SO-50 portable (Baofengs, 2W & Arrow), however perfect on it at main QTH station with 5W (transceiver minimum), 30M of RG213 into a 15 ele X-yagi.
73
Jean Marc (3B8DU)
On Jun 7, 2018, at 11:30 PM, John Brier <[email protected] mailto:[email protected]> wrote:
It was suggested that you need "a few more watts" to use SO-50. That is definitely not the case. I have worked it many times with only 500 mW, even on busy passes, getting in full-quieting. I have also gotten into it with an acceptable signal with only 50 mW on empty relatively high elevation passes. It does has a relatively weak downlink though (250 mW).
Regarding AO-85, it is a little deaf and it's true it's because of an antenna issue. I have some info about it and a "twist trick" fix documented here:
https://spacecomms.wordpress.com/ao-85-twist-trick-and-other-hints/ https://spacecomms.wordpress.com/ao-85-twist-trick-and-other-hints/
73, John Brier KG4AKV
On Thu, Jun 7, 2018 at 2:57 PM, Don KB2YSI <[email protected] mailto:[email protected]> wrote: My FM operating is has been dual HTs and portable, I.E. not tripod, no table, just me and what I can hold. I am working on a SSB setup but only tried it a few times thus far, but that includes a backpack.
Yes, holding 2 radios and an antenna is difficult at best, and risky for the equipment. That is why I took the suggestion to use a piece of wood in the end of my Arrow to mount the RX radio to. This was a major improvement in the setup. Pictures and credit for the ideas are available at hamqth.com/KB2YSI http://hamqth.com/KB2YSI
SO-50 has been my go to satellite and 5w has worked very well for me. AO-85 is my unicorn, sometimes I have no issues getting in, others nothing I do seems to work. My money is on operater error. Hihi. AO-91 & AO-92 are crazy easy to use once I had a full duplex (using 2 radios and a duplexer as a filter) setup.
I am still new, have not been operating a year yet, but am willing to talk offline if anyone is interested. I may have learned a lot the hard way, but it has been incredibly fun time!
73, Don KB2YSI
On Thu, Jun 7, 2018, 14:03 Jean Marc Momple <[email protected] mailto:[email protected]> wrote:
Hugo,
Actually the Baofengs UR-5R that Francois is using are transmitting with only 2 watts on 70cm. Works very well. Sorry for having stated 4W (Vhf power)
I will send you separately a small presentation I did for the local OM’s which trigger Francois venture on the birds.
73
Jean Marc
On Jun 7, 2018, at 9:41 PM, Hugo Dominguez, Jr. <[email protected] mailto:[email protected]>
wrote:
Thanks for the feedback. I’ll keep trying. Is the Baofang being used the
5 watt or 8 watt version? Right now it is hard holding two radios and the antenna. Maybe I can strap it to my antenna and use it for listening for myself. I should also look at mounting my antenna to an old camera tripod to free my hand
— Hugo Dominguez, Jr.
On Jun 7, 2018, at 10:30, Jean Marc Momple <[email protected] mailto:[email protected]>
wrote:
Hugo,
Just to share experience.
3B8GZ (not on the BB, but in copy) is working very well AO-91 and AO92,
crystal clear above 10 deg. ele. with 2 Baofengs and a home brew Arrow type of antenna while on the beach this side of the globe. He made QSO’s with South Africa, Madagascar and locals with less than 4W.
SO-50 is a little more tricky as a 74Hz CTCSS required to trigger the
repeater, then you need to switch CTCSS to 67Hz to QSO. Also it need a few more W for clear QSO.
AO-85 is quite hard-hearing and depending on its path you need between
15 and 50 W with a 10-15 ele yagi to go through reasonably.
Hope this help.
73
Jean Marc (3B8DU)
On Jun 7, 2018, at 9:04 PM, Hugo Dominguez, Jr. <[email protected] mailto:[email protected]>
wrote:
Someone mentioned to me that AO-91 was made to be worked by handhelds.
They also mentioned that AO-85 actually has a damaged receive antenna and that you need more power. Is that correct? Is 5 watts sufficient for AO-92, AO-85 and SO-50?
— Hugo Dominguez, Jr.
On Jun 6, 2018, at 23:08, Daniel Wight <[email protected] mailto:[email protected]> wrote:
As Gabe pointed out, I may have this backwards as I started out on
SO-50 (V/U) & then applied my original techniques to the Fox (U/V) birds in error (i.e. your initial settings are probably correct). I need to do some more research before I understand this fully, but it looks like I've been using the wrong uplink frequencies on my IC-W32A. My apologies for the mistake. Looks like I'll be reprogramming my radio soon....
73,
Daniel, KD7LEE
> On Wed, Jun 6, 2018, 21:50 Hugo Dominguez, Jr. <[email protected] mailto:[email protected]>
wrote:
> Thanks. All the web pages I read said to perform doppler shift by
starting 10 kHz below and work your way up. Even this amsat website has instructions to do it how I am doing it: https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/ https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/
> > I also just noticed that there is a schedule for the L-band for
uplink which i’m interpreting that UHF won’t work when the bird is setup for the L-band for uplink. Maybe I was trying to make contact when it was on the L band.
> > — > Hugo Dominguez, Jr. > >> On Jun 6, 2018, at 21:07, Daniel Wight <[email protected] mailto:[email protected]> wrote: >> >> Seems like your Doppler shift might be opposite. I normally start
high & work my way down during the satellite pass... (For instance, I would start at 435.180 for AO-85 and then work my way down to 435.160 as the satellite 'sunsets' on my horizon). Doppler shift should be higher frequency during approach, near zero when the satellite is overhead, and lower after the satellite passes.
>> >> 73, >> >> Daniel, KD7LEE >> >>> On Wed, Jun 6, 2018, 17:27 Andrew Glasbrenner <
[email protected] mailto:[email protected]> wrote:
>>> You've discovered one of the reasons full duplex is best on the FM
sats...you have no idea if you are getting through, because you can't hear while transmitting.
>>> >>> Got another radio so you can work full duplex? >>> >>> 73, Drew KO4MA >>> >>> -----Original Message----- >>> From: AMSAT-BB <[email protected] mailto:[email protected]> On Behalf Of Hugo
Dominguez, Jr.
>>> Sent: Wednesday, June 06, 2018 7:41 PM >>> To: [email protected] mailto:[email protected] >>> Subject: [amsat-bb] Unsuccessful Uplinks - AO-92 >>> >>> I’ve just started playing with talking on satellites. I’m able to
hear all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on my Kenwood TH-D74, which I use with my Elk dual band periodic log antenna. However no one can hear me or responds to me. I’ve only been successful with my uplink (being heard) on AO-91 on several passes. I triple checked my frequencies on my radio and the 67 Hz tone and they are set as follows:
>>> Sat. Xmit Tone >>> SO-50 145.850 67.0 Hz >>> AO-85 435.170 67.0 Hz >>> AO-91 435.250 67.0 HZ >>> AO-92 435.350 67.0 Hz >>> These are the frequencies used when the bird is at its peak. I
adjust for doppler on 440 by starting out 10 khz less, e.g AO-85 435.160, 435.165, 435.170, 435.175, 435.180.
>>> >>> Any ideas if something has changed from what is published or am I
missing something? Like I said, i’ve been able to communicate on AO-91.
>>> >>> — >>> Hugo Dominguez, Jr. >>> _______________________________________________ >>> Sent via [email protected] mailto:[email protected]. AMSAT-NA makes this open forum
available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA.
>>> Not an AMSAT-NA member? Join now to support the amateur satellite
program!
>>> Subscription settings:
http://www.amsat.org/mailman/listinfo/amsat-bb http://www.amsat.org/mailman/listinfo/amsat-bb
>>> >>> _______________________________________________ >>> Sent via [email protected] mailto:[email protected]. AMSAT-NA makes this open forum
available
>>> to all interested persons worldwide without requiring membership.
Opinions expressed
>>> are solely those of the author, and do not reflect the official
views of AMSAT-NA.
>>> Not an AMSAT-NA member? Join now to support the amateur satellite
program!
>>> Subscription settings:
http://www.amsat.org/mailman/listinfo/amsat-bb http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected] mailto:[email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership.
Opinions expressed
are solely those of the author, and do not reflect the official views
of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite
program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected] mailto:[email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected] mailto:[email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb http://www.amsat.org/mailman/listinfo/amsat-bb
Thanks everyone for the feedback. I do have other handhelds. Is there a way to connect a splitter on my Elk antenna so that I can connect two handhelds? Will that degrade my signal in and/or out? Do I need to filter the signals to split off the VHF and UHF signals? Right now I just try to lay one handheld with its own HT antenna somewhere in case it is able to receive a signal or I try to get someone to hold it for me. Most of the times i’m by myself.
— Hugo Dominguez, Jr.
On Jun 7, 2018, at 11:57, Don KB2YSI [email protected] wrote:
My FM operating is has been dual HTs and portable, I.E. not tripod, no table, just me and what I can hold. I am working on a SSB setup but only tried it a few times thus far, but that includes a backpack.
Yes, holding 2 radios and an antenna is difficult at best, and risky for the equipment. That is why I took the suggestion to use a piece of wood in the end of my Arrow to mount the RX radio to. This was a major improvement in the setup. Pictures and credit for the ideas are available at hamqth.com/KB2YSI
SO-50 has been my go to satellite and 5w has worked very well for me. AO-85 is my unicorn, sometimes I have no issues getting in, others nothing I do seems to work. My money is on operater error. Hihi. AO-91 & AO-92 are crazy easy to use once I had a full duplex (using 2 radios and a duplexer as a filter) setup.
I am still new, have not been operating a year yet, but am willing to talk offline if anyone is interested. I may have learned a lot the hard way, but it has been incredibly fun time!
73, Don KB2YSI
On Thu, Jun 7, 2018, 14:03 Jean Marc Momple [email protected] wrote: Hugo,
Actually the Baofengs UR-5R that Francois is using are transmitting with only 2 watts on 70cm. Works very well. Sorry for having stated 4W (Vhf power)
I will send you separately a small presentation I did for the local OM’s which trigger Francois venture on the birds.
73
Jean Marc
On Jun 7, 2018, at 9:41 PM, Hugo Dominguez, Jr. [email protected] wrote:
Thanks for the feedback. I’ll keep trying. Is the Baofang being used the 5 watt or 8 watt version? Right now it is hard holding two radios and the antenna. Maybe I can strap it to my antenna and use it for listening for myself. I should also look at mounting my antenna to an old camera tripod to free my hand
— Hugo Dominguez, Jr.
On Jun 7, 2018, at 10:30, Jean Marc Momple [email protected] wrote:
Hugo,
Just to share experience.
3B8GZ (not on the BB, but in copy) is working very well AO-91 and AO92, crystal clear above 10 deg. ele. with 2 Baofengs and a home brew Arrow type of antenna while on the beach this side of the globe. He made QSO’s with South Africa, Madagascar and locals with less than 4W.
SO-50 is a little more tricky as a 74Hz CTCSS required to trigger the repeater, then you need to switch CTCSS to 67Hz to QSO. Also it need a few more W for clear QSO.
AO-85 is quite hard-hearing and depending on its path you need between 15 and 50 W with a 10-15 ele yagi to go through reasonably.
Hope this help.
73
Jean Marc (3B8DU)
On Jun 7, 2018, at 9:04 PM, Hugo Dominguez, Jr. [email protected] wrote:
Someone mentioned to me that AO-91 was made to be worked by handhelds. They also mentioned that AO-85 actually has a damaged receive antenna and that you need more power. Is that correct? Is 5 watts sufficient for AO-92, AO-85 and SO-50?
— Hugo Dominguez, Jr.
On Jun 6, 2018, at 23:08, Daniel Wight [email protected] wrote:
As Gabe pointed out, I may have this backwards as I started out on SO-50 (V/U) & then applied my original techniques to the Fox (U/V) birds in error (i.e. your initial settings are probably correct). I need to do some more research before I understand this fully, but it looks like I've been using the wrong uplink frequencies on my IC-W32A. My apologies for the mistake. Looks like I'll be reprogramming my radio soon....
73,
Daniel, KD7LEE
> On Wed, Jun 6, 2018, 21:50 Hugo Dominguez, Jr. [email protected] wrote: > Thanks. All the web pages I read said to perform doppler shift by starting 10 kHz below and work your way up. Even this amsat website has instructions to do it how I am doing it: https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/ > > I also just noticed that there is a schedule for the L-band for uplink which i’m interpreting that UHF won’t work when the bird is setup for the L-band for uplink. Maybe I was trying to make contact when it was on the L band. > > — > Hugo Dominguez, Jr. > >> On Jun 6, 2018, at 21:07, Daniel Wight [email protected] wrote: >> >> Seems like your Doppler shift might be opposite. I normally start high & work my way down during the satellite pass... (For instance, I would start at 435.180 for AO-85 and then work my way down to 435.160 as the satellite 'sunsets' on my horizon). Doppler shift should be higher frequency during approach, near zero when the satellite is overhead, and lower after the satellite passes. >> >> 73, >> >> Daniel, KD7LEE >> >>> On Wed, Jun 6, 2018, 17:27 Andrew Glasbrenner [email protected] wrote: >>> You've discovered one of the reasons full duplex is best on the FM sats...you have no idea if you are getting through, because you can't hear while transmitting. >>> >>> Got another radio so you can work full duplex? >>> >>> 73, Drew KO4MA >>> >>> -----Original Message----- >>> From: AMSAT-BB [email protected] On Behalf Of Hugo Dominguez, Jr. >>> Sent: Wednesday, June 06, 2018 7:41 PM >>> To: [email protected] >>> Subject: [amsat-bb] Unsuccessful Uplinks - AO-92 >>> >>> I’ve just started playing with talking on satellites. I’m able to hear all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on my Kenwood TH-D74, which I use with my Elk dual band periodic log antenna. However no one can hear me or responds to me. I’ve only been successful with my uplink (being heard) on AO-91 on several passes. I triple checked my frequencies on my radio and the 67 Hz tone and they are set as follows: >>> Sat. Xmit Tone >>> SO-50 145.850 67.0 Hz >>> AO-85 435.170 67.0 Hz >>> AO-91 435.250 67.0 HZ >>> AO-92 435.350 67.0 Hz >>> These are the frequencies used when the bird is at its peak. I adjust for doppler on 440 by starting out 10 khz less, e.g AO-85 435.160, 435.165, 435.170, 435.175, 435.180. >>> >>> Any ideas if something has changed from what is published or am I missing something? Like I said, i’ve been able to communicate on AO-91. >>> >>> — >>> Hugo Dominguez, Jr. >>> _______________________________________________ >>> Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. >>> Not an AMSAT-NA member? Join now to support the amateur satellite program! >>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb >>> >>> _______________________________________________ >>> Sent via [email protected]. AMSAT-NA makes this open forum available >>> to all interested persons worldwide without requiring membership. Opinions expressed >>> are solely those of the author, and do not reflect the official views of AMSAT-NA. >>> Not an AMSAT-NA member? Join now to support the amateur satellite program! >>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
What I have done is to hook the common port to the antenna that I want and then the HT up to the side of the duplexer that I want to use. I found it easier to use the VHF side of the Arrow for this setup.
73, Don KB2YSI
On Fri, Jun 8, 2018, 08:37 Hugo Dominguez, Jr. [email protected] wrote:
Thanks everyone for the feedback. I do have other handhelds. Is there a way to connect a splitter on my Elk antenna so that I can connect two handhelds? Will that degrade my signal in and/or out? Do I need to filter the signals to split off the VHF and UHF signals? Right now I just try to lay one handheld with its own HT antenna somewhere in case it is able to receive a signal or I try to get someone to hold it for me. Most of the times i’m by myself.
— Hugo Dominguez, Jr.
On Jun 7, 2018, at 11:57, Don KB2YSI [email protected] wrote:
My FM operating is has been dual HTs and portable, I.E. not tripod, no table, just me and what I can hold. I am working on a SSB setup but only tried it a few times thus far, but that includes a backpack.
Yes, holding 2 radios and an antenna is difficult at best, and risky for the equipment. That is why I took the suggestion to use a piece of wood in the end of my Arrow to mount the RX radio to. This was a major improvement in the setup. Pictures and credit for the ideas are available at hamqth.com/KB2YSI
SO-50 has been my go to satellite and 5w has worked very well for me. AO-85 is my unicorn, sometimes I have no issues getting in, others nothing I do seems to work. My money is on operater error. Hihi. AO-91 & AO-92 are crazy easy to use once I had a full duplex (using 2 radios and a duplexer as a filter) setup.
I am still new, have not been operating a year yet, but am willing to talk offline if anyone is interested. I may have learned a lot the hard way, but it has been incredibly fun time!
73, Don KB2YSI
On Thu, Jun 7, 2018, 14:03 Jean Marc Momple [email protected] wrote:
Hugo,
Actually the Baofengs UR-5R that Francois is using are transmitting with only 2 watts on 70cm. Works very well. Sorry for having stated 4W (Vhf power)
I will send you separately a small presentation I did for the local OM’s which trigger Francois venture on the birds.
73
Jean Marc
On Jun 7, 2018, at 9:41 PM, Hugo Dominguez, Jr. [email protected]
wrote:
Thanks for the feedback. I’ll keep trying. Is the Baofang being used
the 5 watt or 8 watt version? Right now it is hard holding two radios and the antenna. Maybe I can strap it to my antenna and use it for listening for myself. I should also look at mounting my antenna to an old camera tripod to free my hand
— Hugo Dominguez, Jr.
On Jun 7, 2018, at 10:30, Jean Marc Momple [email protected]
wrote:
Hugo,
Just to share experience.
3B8GZ (not on the BB, but in copy) is working very well AO-91 and
AO92, crystal clear above 10 deg. ele. with 2 Baofengs and a home brew Arrow type of antenna while on the beach this side of the globe. He made QSO’s with South Africa, Madagascar and locals with less than 4W.
SO-50 is a little more tricky as a 74Hz CTCSS required to trigger the
repeater, then you need to switch CTCSS to 67Hz to QSO. Also it need a few more W for clear QSO.
AO-85 is quite hard-hearing and depending on its path you need between
15 and 50 W with a 10-15 ele yagi to go through reasonably.
Hope this help.
73
Jean Marc (3B8DU)
On Jun 7, 2018, at 9:04 PM, Hugo Dominguez, Jr. [email protected]
wrote:
Someone mentioned to me that AO-91 was made to be worked by
handhelds. They also mentioned that AO-85 actually has a damaged receive antenna and that you need more power. Is that correct? Is 5 watts sufficient for AO-92, AO-85 and SO-50?
— Hugo Dominguez, Jr.
On Jun 6, 2018, at 23:08, Daniel Wight [email protected] wrote:
As Gabe pointed out, I may have this backwards as I started out on
SO-50 (V/U) & then applied my original techniques to the Fox (U/V) birds in error (i.e. your initial settings are probably correct). I need to do some more research before I understand this fully, but it looks like I've been using the wrong uplink frequencies on my IC-W32A. My apologies for the mistake. Looks like I'll be reprogramming my radio soon....
73,
Daniel, KD7LEE
> On Wed, Jun 6, 2018, 21:50 Hugo Dominguez, Jr. [email protected]
wrote:
> Thanks. All the web pages I read said to perform doppler shift by
starting 10 kHz below and work your way up. Even this amsat website has instructions to do it how I am doing it: https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/
> > I also just noticed that there is a schedule for the L-band for
uplink which i’m interpreting that UHF won’t work when the bird is setup for the L-band for uplink. Maybe I was trying to make contact when it was on the L band.
> > — > Hugo Dominguez, Jr. > >> On Jun 6, 2018, at 21:07, Daniel Wight [email protected] wrote: >> >> Seems like your Doppler shift might be opposite. I normally start
high & work my way down during the satellite pass... (For instance, I would start at 435.180 for AO-85 and then work my way down to 435.160 as the satellite 'sunsets' on my horizon). Doppler shift should be higher frequency during approach, near zero when the satellite is overhead, and lower after the satellite passes.
>> >> 73, >> >> Daniel, KD7LEE >> >>> On Wed, Jun 6, 2018, 17:27 Andrew Glasbrenner <
[email protected]> wrote:
>>> You've discovered one of the reasons full duplex is best on the
FM sats...you have no idea if you are getting through, because you can't hear while transmitting.
>>> >>> Got another radio so you can work full duplex? >>> >>> 73, Drew KO4MA >>> >>> -----Original Message----- >>> From: AMSAT-BB [email protected] On Behalf Of Hugo
Dominguez, Jr.
>>> Sent: Wednesday, June 06, 2018 7:41 PM >>> To: [email protected] >>> Subject: [amsat-bb] Unsuccessful Uplinks - AO-92 >>> >>> I’ve just started playing with talking on satellites. I’m able to
hear all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on my Kenwood TH-D74, which I use with my Elk dual band periodic log antenna. However no one can hear me or responds to me. I’ve only been successful with my uplink (being heard) on AO-91 on several passes. I triple checked my frequencies on my radio and the 67 Hz tone and they are set as follows:
>>> Sat. Xmit Tone >>> SO-50 145.850 67.0 Hz >>> AO-85 435.170 67.0 Hz >>> AO-91 435.250 67.0 HZ >>> AO-92 435.350 67.0 Hz >>> These are the frequencies used when the bird is at its peak. I
adjust for doppler on 440 by starting out 10 khz less, e.g AO-85 435.160, 435.165, 435.170, 435.175, 435.180.
>>> >>> Any ideas if something has changed from what is published or am I
missing something? Like I said, i’ve been able to communicate on AO-91.
>>> >>> — >>> Hugo Dominguez, Jr. >>> _______________________________________________ >>> Sent via [email protected]. AMSAT-NA makes this open forum
available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA.
>>> Not an AMSAT-NA member? Join now to support the amateur satellite
program!
>>> Subscription settings:
http://www.amsat.org/mailman/listinfo/amsat-bb
>>> >>> _______________________________________________ >>> Sent via [email protected]. AMSAT-NA makes this open forum
available
>>> to all interested persons worldwide without requiring membership.
Opinions expressed
>>> are solely those of the author, and do not reflect the official
views of AMSAT-NA.
>>> Not an AMSAT-NA member? Join now to support the amateur satellite
program!
>>> Subscription settings:
http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership.
Opinions expressed
are solely those of the author, and do not reflect the official views
of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite
program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
MFJ sells a duplexer (aka Diplexer). The model number is MFJ-916B. There are other manufacturers also such as Comet and Diamond, etc.
There was an article not long ago in the Amsat Journal, (or was it QST?), comparing different models.
73 Rolf NR0T EN34it
On Fri, Jun 8, 2018 at 8:10 AM, Don KB2YSI [email protected] wrote:
What I have done is to hook the common port to the antenna that I want and then the HT up to the side of the duplexer that I want to use. I found it easier to use the VHF side of the Arrow for this setup.
73, Don KB2YSI
On Fri, Jun 8, 2018, 08:37 Hugo Dominguez, Jr. [email protected] wrote:
Thanks everyone for the feedback. I do have other handhelds. Is there a way to connect a splitter on my Elk antenna so that I can connect two handhelds? Will that degrade my signal in and/or out? Do I need to filter the signals to split off the VHF and UHF signals? Right now I just try to lay one handheld with its own HT antenna somewhere in case it is able to receive a signal or I try to get someone to hold it for me. Most of the times i’m by myself.
— Hugo Dominguez, Jr.
On Jun 7, 2018, at 11:57, Don KB2YSI [email protected] wrote:
My FM operating is has been dual HTs and portable, I.E. not tripod, no table, just me and what I can hold. I am working on a SSB setup but only tried it a few times thus far, but that includes a backpack.
Yes, holding 2 radios and an antenna is difficult at best, and risky for the equipment. That is why I took the suggestion to use a piece of wood
in
the end of my Arrow to mount the RX radio to. This was a major
improvement
in the setup. Pictures and credit for the ideas are available at hamqth.com/KB2YSI
SO-50 has been my go to satellite and 5w has worked very well for me. AO-85 is my unicorn, sometimes I have no issues getting in, others
nothing
I do seems to work. My money is on operater error. Hihi. AO-91 & AO-92
are
crazy easy to use once I had a full duplex (using 2 radios and a duplexer as a filter) setup.
I am still new, have not been operating a year yet, but am willing to
talk
offline if anyone is interested. I may have learned a lot the hard way,
but
it has been incredibly fun time!
73, Don KB2YSI
On Thu, Jun 7, 2018, 14:03 Jean Marc Momple [email protected] wrote:
Hugo,
Actually the Baofengs UR-5R that Francois is using are transmitting with only 2 watts on 70cm. Works very well. Sorry for having stated 4W (Vhf power)
I will send you separately a small presentation I did for the local OM’s which trigger Francois venture on the birds.
73
Jean Marc
On Jun 7, 2018, at 9:41 PM, Hugo Dominguez, Jr. [email protected]
wrote:
Thanks for the feedback. I’ll keep trying. Is the Baofang being used
the 5 watt or 8 watt version? Right now it is hard holding two radios
and
the antenna. Maybe I can strap it to my antenna and use it for listening for myself. I should also look at mounting my antenna to an old camera tripod to free my hand
— Hugo Dominguez, Jr.
On Jun 7, 2018, at 10:30, Jean Marc Momple <
wrote:
Hugo,
Just to share experience.
3B8GZ (not on the BB, but in copy) is working very well AO-91 and
AO92, crystal clear above 10 deg. ele. with 2 Baofengs and a home brew Arrow type of antenna while on the beach this side of the globe. He made QSO’s with South Africa, Madagascar and locals with less than 4W.
SO-50 is a little more tricky as a 74Hz CTCSS required to trigger the
repeater, then you need to switch CTCSS to 67Hz to QSO. Also it need a
few
more W for clear QSO.
AO-85 is quite hard-hearing and depending on its path you need
between
15 and 50 W with a 10-15 ele yagi to go through reasonably.
Hope this help.
73
Jean Marc (3B8DU)
On Jun 7, 2018, at 9:04 PM, Hugo Dominguez, Jr. [email protected]
wrote:
Someone mentioned to me that AO-91 was made to be worked by
handhelds. They also mentioned that AO-85 actually has a damaged receive antenna and that you need more power. Is that correct? Is 5 watts sufficient for AO-92, AO-85 and SO-50?
— Hugo Dominguez, Jr.
> On Jun 6, 2018, at 23:08, Daniel Wight [email protected] wrote: > > As Gabe pointed out, I may have this backwards as I started out on
SO-50 (V/U) & then applied my original techniques to the Fox (U/V)
birds in
error (i.e. your initial settings are probably correct). I need to do
some
more research before I understand this fully, but it looks like I've
been
using the wrong uplink frequencies on my IC-W32A. My apologies for the mistake. Looks like I'll be reprogramming my radio soon....
> > 73, > > Daniel, KD7LEE > >> On Wed, Jun 6, 2018, 21:50 Hugo Dominguez, Jr. [email protected]
wrote:
>> Thanks. All the web pages I read said to perform doppler shift by
starting 10 kHz below and work your way up. Even this amsat website has instructions to do it how I am doing it: https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/
>> >> I also just noticed that there is a schedule for the L-band for
uplink which i’m interpreting that UHF won’t work when the bird is setup for the L-band for uplink. Maybe I was trying to make contact when it
was
on the L band.
>> >> — >> Hugo Dominguez, Jr. >> >>> On Jun 6, 2018, at 21:07, Daniel Wight [email protected] wrote: >>> >>> Seems like your Doppler shift might be opposite. I normally start
high & work my way down during the satellite pass... (For instance, I
would
start at 435.180 for AO-85 and then work my way down to 435.160 as the satellite 'sunsets' on my horizon). Doppler shift should be higher frequency during approach, near zero when the satellite is overhead, and lower after the satellite passes.
>>> >>> 73, >>> >>> Daniel, KD7LEE >>> >>>> On Wed, Jun 6, 2018, 17:27 Andrew Glasbrenner <
[email protected]> wrote:
>>>> You've discovered one of the reasons full duplex is best on the
FM sats...you have no idea if you are getting through, because you can't hear while transmitting.
>>>> >>>> Got another radio so you can work full duplex? >>>> >>>> 73, Drew KO4MA >>>> >>>> -----Original Message----- >>>> From: AMSAT-BB [email protected] On Behalf Of Hugo
Dominguez, Jr.
>>>> Sent: Wednesday, June 06, 2018 7:41 PM >>>> To: [email protected] >>>> Subject: [amsat-bb] Unsuccessful Uplinks - AO-92 >>>> >>>> I’ve just started playing with talking on satellites. I’m able
to
hear all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on my Kenwood TH-D74, which I use with my Elk dual band
periodic
log antenna. However no one can hear me or responds to me. I’ve only
been
successful with my uplink (being heard) on AO-91 on several passes. I triple checked my frequencies on my radio and the 67 Hz tone and they
are
set as follows:
>>>> Sat. Xmit Tone >>>> SO-50 145.850 67.0 Hz >>>> AO-85 435.170 67.0 Hz >>>> AO-91 435.250 67.0 HZ >>>> AO-92 435.350 67.0 Hz >>>> These are the frequencies used when the bird is at its peak. I
adjust for doppler on 440 by starting out 10 khz less, e.g AO-85
435.160,
435.165, 435.170, 435.175, 435.180.
>>>> >>>> Any ideas if something has changed from what is published or am
I
missing something? Like I said, i’ve been able to communicate on AO-91.
>>>> >>>> — >>>> Hugo Dominguez, Jr. >>>> _______________________________________________ >>>> Sent via [email protected]. AMSAT-NA makes this open forum
available to all interested persons worldwide without requiring
membership.
Opinions expressed are solely those of the author, and do not reflect
the
official views of AMSAT-NA.
>>>> Not an AMSAT-NA member? Join now to support the amateur
satellite
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>>>> Subscription settings:
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>>>> >>>> _______________________________________________ >>>> Sent via [email protected]. AMSAT-NA makes this open forum
available
>>>> to all interested persons worldwide without requiring
membership.
Opinions expressed
>>>> are solely those of the author, and do not reflect the official
views of AMSAT-NA.
>>>> Not an AMSAT-NA member? Join now to support the amateur
satellite
program!
>>>> Subscription settings:
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Sent via [email protected]. AMSAT-NA makes this open forum
available
to all interested persons worldwide without requiring membership.
Opinions expressed
are solely those of the author, and do not reflect the official
views
of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite
program!
Subscription settings: http://www.amsat.org/mailman/
listinfo/amsat-bb
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Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
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Rolf,
I don't know about the magazines, but I saw a review online comparing the MFJ-916B to a Diamond MX-72:
http://www.w4gso.org/news/comparing-duplexers-mfj-vs-diamond/
The MFJ unit outperformed the Diamond unit.
I have been using the MFJ units for years. They are made in Taiwan, and are priced at about half the price of the equivalent Diamond or Comet units. They are rugged, and work well.
73!
Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/ Twitter: @WD9EWK or http://twitter.com/WD9EWK
On Friday, June 8, 2018, Rolf Krogstad [email protected] wrote:
MFJ sells a duplexer (aka Diplexer). The model number is MFJ-916B. There are other manufacturers also such as Comet and Diamond, etc.
There was an article not long ago in the Amsat Journal, (or was it QST?), comparing different models.
73 Rolf NR0T
Another good article on the topic is:
A Survey of 2 Meter/70 Centimeter Diplexers >> http://www.dci.ca/pdf/qst-dec-2004.pdf
73, Adrian AA5UK
On Friday, June 8, 2018, 9:42:43 AM CDT, Patrick STODDARD (WD9EWK/VA7EWK) [email protected] wrote:
Rolf,
I don't know about the magazines, but I saw a review online comparing the MFJ-916B to a Diamond MX-72:
http://www.w4gso.org/news/comparing-duplexers-mfj-vs-diamond/
The MFJ unit outperformed the Diamond unit.
I have been using the MFJ units for years. They are made in Taiwan, and are priced at about half the price of the equivalent Diamond or Comet units. They are rugged, and work well.
73!
Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/ Twitter: @WD9EWK or http://twitter.com/WD9EWK
On Friday, June 8, 2018, Rolf Krogstad [email protected] wrote:
MFJ sells a duplexer (aka Diplexer). The model number is MFJ-916B. There are other manufacturers also such as Comet and Diamond, etc.
There was an article not long ago in the Amsat Journal, (or was it QST?), comparing different models.
73 Rolf NR0T
_______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Thanks so much. The MFJ seems perfect with good reviews. Then I can rig my baofeng for receive to the Elk and hand hold my D74 for transmitting or vice versa so that I can use the D74 to record the received signal. I Was going to order one from Amazon but it is $7 cheaper at HRO. Hoping to get one by Saturday and be more successful. It is getting very sad not hearing anyone come back to me, especially when the bird isn’t busy. I heard two DX stations last night probably from Mexico or South America on AO-92. No response from anyone of course.
— Hugo Dominguez, Jr.
On Jun 8, 2018, at 06:34, Rolf Krogstad [email protected] wrote:
MFJ sells a duplexer (aka Diplexer). The model number is MFJ-916B. There are other manufacturers also such as Comet and Diamond, etc.
There was an article not long ago in the Amsat Journal, (or was it QST?), comparing different models.
73 Rolf NR0T EN34it
On Fri, Jun 8, 2018 at 8:10 AM, Don KB2YSI [email protected] wrote: What I have done is to hook the common port to the antenna that I want and then the HT up to the side of the duplexer that I want to use. I found it easier to use the VHF side of the Arrow for this setup.
73, Don KB2YSI
On Fri, Jun 8, 2018, 08:37 Hugo Dominguez, Jr. [email protected] wrote:
Thanks everyone for the feedback. I do have other handhelds. Is there a way to connect a splitter on my Elk antenna so that I can connect two handhelds? Will that degrade my signal in and/or out? Do I need to filter the signals to split off the VHF and UHF signals? Right now I just try to lay one handheld with its own HT antenna somewhere in case it is able to receive a signal or I try to get someone to hold it for me. Most of the times i’m by myself.
— Hugo Dominguez, Jr.
On Jun 7, 2018, at 11:57, Don KB2YSI [email protected] wrote:
My FM operating is has been dual HTs and portable, I.E. not tripod, no table, just me and what I can hold. I am working on a SSB setup but only tried it a few times thus far, but that includes a backpack.
Yes, holding 2 radios and an antenna is difficult at best, and risky for the equipment. That is why I took the suggestion to use a piece of wood in the end of my Arrow to mount the RX radio to. This was a major improvement in the setup. Pictures and credit for the ideas are available at hamqth.com/KB2YSI
SO-50 has been my go to satellite and 5w has worked very well for me. AO-85 is my unicorn, sometimes I have no issues getting in, others nothing I do seems to work. My money is on operater error. Hihi. AO-91 & AO-92 are crazy easy to use once I had a full duplex (using 2 radios and a duplexer as a filter) setup.
I am still new, have not been operating a year yet, but am willing to talk offline if anyone is interested. I may have learned a lot the hard way, but it has been incredibly fun time!
73, Don KB2YSI
On Thu, Jun 7, 2018, 14:03 Jean Marc Momple [email protected] wrote:
Hugo,
Actually the Baofengs UR-5R that Francois is using are transmitting with only 2 watts on 70cm. Works very well. Sorry for having stated 4W (Vhf power)
I will send you separately a small presentation I did for the local OM’s which trigger Francois venture on the birds.
73
Jean Marc
On Jun 7, 2018, at 9:41 PM, Hugo Dominguez, Jr. [email protected]
wrote:
Thanks for the feedback. I’ll keep trying. Is the Baofang being used
the 5 watt or 8 watt version? Right now it is hard holding two radios and the antenna. Maybe I can strap it to my antenna and use it for listening for myself. I should also look at mounting my antenna to an old camera tripod to free my hand
— Hugo Dominguez, Jr.
On Jun 7, 2018, at 10:30, Jean Marc Momple [email protected]
wrote:
Hugo,
Just to share experience.
3B8GZ (not on the BB, but in copy) is working very well AO-91 and
AO92, crystal clear above 10 deg. ele. with 2 Baofengs and a home brew Arrow type of antenna while on the beach this side of the globe. He made QSO’s with South Africa, Madagascar and locals with less than 4W.
SO-50 is a little more tricky as a 74Hz CTCSS required to trigger the
repeater, then you need to switch CTCSS to 67Hz to QSO. Also it need a few more W for clear QSO.
AO-85 is quite hard-hearing and depending on its path you need between
15 and 50 W with a 10-15 ele yagi to go through reasonably.
Hope this help.
73
Jean Marc (3B8DU)
> On Jun 7, 2018, at 9:04 PM, Hugo Dominguez, Jr. [email protected]
wrote:
> > Someone mentioned to me that AO-91 was made to be worked by
handhelds. They also mentioned that AO-85 actually has a damaged receive antenna and that you need more power. Is that correct? Is 5 watts sufficient for AO-92, AO-85 and SO-50?
> > — > Hugo Dominguez, Jr. > >> On Jun 6, 2018, at 23:08, Daniel Wight [email protected] wrote: >> >> As Gabe pointed out, I may have this backwards as I started out on
SO-50 (V/U) & then applied my original techniques to the Fox (U/V) birds in error (i.e. your initial settings are probably correct). I need to do some more research before I understand this fully, but it looks like I've been using the wrong uplink frequencies on my IC-W32A. My apologies for the mistake. Looks like I'll be reprogramming my radio soon....
>> >> 73, >> >> Daniel, KD7LEE >> >>> On Wed, Jun 6, 2018, 21:50 Hugo Dominguez, Jr. [email protected]
wrote:
>>> Thanks. All the web pages I read said to perform doppler shift by
starting 10 kHz below and work your way up. Even this amsat website has instructions to do it how I am doing it: https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/
>>> >>> I also just noticed that there is a schedule for the L-band for
uplink which i’m interpreting that UHF won’t work when the bird is setup for the L-band for uplink. Maybe I was trying to make contact when it was on the L band.
>>> >>> — >>> Hugo Dominguez, Jr. >>> >>>> On Jun 6, 2018, at 21:07, Daniel Wight [email protected] wrote: >>>> >>>> Seems like your Doppler shift might be opposite. I normally start
high & work my way down during the satellite pass... (For instance, I would start at 435.180 for AO-85 and then work my way down to 435.160 as the satellite 'sunsets' on my horizon). Doppler shift should be higher frequency during approach, near zero when the satellite is overhead, and lower after the satellite passes.
>>>> >>>> 73, >>>> >>>> Daniel, KD7LEE >>>> >>>>> On Wed, Jun 6, 2018, 17:27 Andrew Glasbrenner <
[email protected]> wrote:
>>>>> You've discovered one of the reasons full duplex is best on the
FM sats...you have no idea if you are getting through, because you can't hear while transmitting.
>>>>> >>>>> Got another radio so you can work full duplex? >>>>> >>>>> 73, Drew KO4MA >>>>> >>>>> -----Original Message----- >>>>> From: AMSAT-BB [email protected] On Behalf Of Hugo
Dominguez, Jr.
>>>>> Sent: Wednesday, June 06, 2018 7:41 PM >>>>> To: [email protected] >>>>> Subject: [amsat-bb] Unsuccessful Uplinks - AO-92 >>>>> >>>>> I’ve just started playing with talking on satellites. I’m able to
hear all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on my Kenwood TH-D74, which I use with my Elk dual band periodic log antenna. However no one can hear me or responds to me. I’ve only been successful with my uplink (being heard) on AO-91 on several passes. I triple checked my frequencies on my radio and the 67 Hz tone and they are set as follows:
>>>>> Sat. Xmit Tone >>>>> SO-50 145.850 67.0 Hz >>>>> AO-85 435.170 67.0 Hz >>>>> AO-91 435.250 67.0 HZ >>>>> AO-92 435.350 67.0 Hz >>>>> These are the frequencies used when the bird is at its peak. I
adjust for doppler on 440 by starting out 10 khz less, e.g AO-85 435.160, 435.165, 435.170, 435.175, 435.180.
>>>>> >>>>> Any ideas if something has changed from what is published or am I
missing something? Like I said, i’ve been able to communicate on AO-91.
>>>>> >>>>> — >>>>> Hugo Dominguez, Jr. >>>>> _______________________________________________ >>>>> Sent via [email protected]. AMSAT-NA makes this open forum
available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA.
>>>>> Not an AMSAT-NA member? Join now to support the amateur satellite
program!
>>>>> Subscription settings:
http://www.amsat.org/mailman/listinfo/amsat-bb
>>>>> >>>>> _______________________________________________ >>>>> Sent via [email protected]. AMSAT-NA makes this open forum
available
>>>>> to all interested persons worldwide without requiring membership.
Opinions expressed
>>>>> are solely those of the author, and do not reflect the official
views of AMSAT-NA.
>>>>> Not an AMSAT-NA member? Join now to support the amateur satellite
program!
>>>>> Subscription settings:
http://www.amsat.org/mailman/listinfo/amsat-bb
> _______________________________________________ > Sent via [email protected]. AMSAT-NA makes this open forum available > to all interested persons worldwide without requiring membership.
Opinions expressed
> are solely those of the author, and do not reflect the official views
of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite
program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Use the D74 on receiving, it is very important to hear as well as possible! Not to mention that you can use the built-in recorder, as I do, which is very handy.
The Btech uv-5x3 day I use for TX cannot hear very well at all; I tried it on RX once and never tried a second time.
73, Don KB2YSI
On Tue, Jun 12, 2018, 08:43 Hugo Dominguez, Jr. [email protected] wrote:
Thanks so much. The MFJ seems perfect with good reviews. Then I can rig my baofeng for receive to the Elk and hand hold my D74 for transmitting or vice versa so that I can use the D74 to record the received signal. I Was going to order one from Amazon but it is $7 cheaper at HRO. Hoping to get one by Saturday and be more successful. It is getting very sad not hearing anyone come back to me, especially when the bird isn’t busy. I heard two DX stations last night probably from Mexico or South America on AO-92. No response from anyone of course.
— Hugo Dominguez, Jr.
On Jun 8, 2018, at 06:34, Rolf Krogstad [email protected] wrote:
MFJ sells a duplexer (aka Diplexer). The model number is MFJ-916B. There are other manufacturers also such as Comet and Diamond, etc.
There was an article not long ago in the Amsat Journal, (or was it QST?), comparing different models.
73 Rolf NR0T EN34it
On Fri, Jun 8, 2018 at 8:10 AM, Don KB2YSI [email protected] wrote:
What I have done is to hook the common port to the antenna that I want and then the HT up to the side of the duplexer that I want to use. I found it easier to use the VHF side of the Arrow for this setup.
73, Don KB2YSI
On Fri, Jun 8, 2018, 08:37 Hugo Dominguez, Jr. [email protected] wrote:
Thanks everyone for the feedback. I do have other handhelds. Is there a way to connect a splitter on my Elk antenna so that I can connect two handhelds? Will that degrade my signal in and/or out? Do I need to
filter
the signals to split off the VHF and UHF signals? Right now I just try
to
lay one handheld with its own HT antenna somewhere in case it is able to receive a signal or I try to get someone to hold it for me. Most of the times i’m by myself.
— Hugo Dominguez, Jr.
On Jun 7, 2018, at 11:57, Don KB2YSI [email protected] wrote:
My FM operating is has been dual HTs and portable, I.E. not tripod, no table, just me and what I can hold. I am working on a SSB setup but only tried it a few times thus far, but that includes a backpack.
Yes, holding 2 radios and an antenna is difficult at best, and risky for the equipment. That is why I took the suggestion to use a piece of wood
in
the end of my Arrow to mount the RX radio to. This was a major
improvement
in the setup. Pictures and credit for the ideas are available at hamqth.com/KB2YSI
SO-50 has been my go to satellite and 5w has worked very well for me. AO-85 is my unicorn, sometimes I have no issues getting in, others
nothing
I do seems to work. My money is on operater error. Hihi. AO-91 & AO-92
are
crazy easy to use once I had a full duplex (using 2 radios and a
duplexer
as a filter) setup.
I am still new, have not been operating a year yet, but am willing to
talk
offline if anyone is interested. I may have learned a lot the hard way,
but
it has been incredibly fun time!
73, Don KB2YSI
On Thu, Jun 7, 2018, 14:03 Jean Marc Momple <[email protected]
wrote:
Hugo,
Actually the Baofengs UR-5R that Francois is using are transmitting
with
only 2 watts on 70cm. Works very well. Sorry for having stated 4W (Vhf power)
I will send you separately a small presentation I did for the local
OM’s
which trigger Francois venture on the birds.
73
Jean Marc
On Jun 7, 2018, at 9:41 PM, Hugo Dominguez, Jr. [email protected]
wrote:
Thanks for the feedback. I’ll keep trying. Is the Baofang being used
the 5 watt or 8 watt version? Right now it is hard holding two radios
and
the antenna. Maybe I can strap it to my antenna and use it for
listening
for myself. I should also look at mounting my antenna to an old camera tripod to free my hand
— Hugo Dominguez, Jr.
On Jun 7, 2018, at 10:30, Jean Marc Momple <
wrote:
Hugo,
Just to share experience.
3B8GZ (not on the BB, but in copy) is working very well AO-91 and
AO92, crystal clear above 10 deg. ele. with 2 Baofengs and a home brew Arrow type of antenna while on the beach this side of the globe. He
made
QSO’s with South Africa, Madagascar and locals with less than 4W.
SO-50 is a little more tricky as a 74Hz CTCSS required to trigger
the
repeater, then you need to switch CTCSS to 67Hz to QSO. Also it need a
few
more W for clear QSO.
AO-85 is quite hard-hearing and depending on its path you need
between
15 and 50 W with a 10-15 ele yagi to go through reasonably.
Hope this help.
73
Jean Marc (3B8DU)
> On Jun 7, 2018, at 9:04 PM, Hugo Dominguez, Jr. [email protected]
wrote:
> > Someone mentioned to me that AO-91 was made to be worked by
handhelds. They also mentioned that AO-85 actually has a damaged
receive
antenna and that you need more power. Is that correct? Is 5 watts sufficient for AO-92, AO-85 and SO-50?
> > — > Hugo Dominguez, Jr. > >> On Jun 6, 2018, at 23:08, Daniel Wight [email protected] wrote: >> >> As Gabe pointed out, I may have this backwards as I started out on
SO-50 (V/U) & then applied my original techniques to the Fox (U/V)
birds in
error (i.e. your initial settings are probably correct). I need to do
some
more research before I understand this fully, but it looks like I've
been
using the wrong uplink frequencies on my IC-W32A. My apologies for the mistake. Looks like I'll be reprogramming my radio soon....
>> >> 73, >> >> Daniel, KD7LEE >> >>> On Wed, Jun 6, 2018, 21:50 Hugo Dominguez, Jr. <[email protected]
wrote:
>>> Thanks. All the web pages I read said to perform doppler shift by
starting 10 kHz below and work your way up. Even this amsat website has instructions to do it how I am doing it: https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/
>>> >>> I also just noticed that there is a schedule for the L-band for
uplink which i’m interpreting that UHF won’t work when the bird is
setup
for the L-band for uplink. Maybe I was trying to make contact when it
was
on the L band.
>>> >>> — >>> Hugo Dominguez, Jr. >>> >>>> On Jun 6, 2018, at 21:07, Daniel Wight [email protected]
wrote:
>>>> >>>> Seems like your Doppler shift might be opposite. I normally
start
high & work my way down during the satellite pass... (For instance, I
would
start at 435.180 for AO-85 and then work my way down to 435.160 as the satellite 'sunsets' on my horizon). Doppler shift should be higher frequency during approach, near zero when the satellite is overhead,
and
lower after the satellite passes.
>>>> >>>> 73, >>>> >>>> Daniel, KD7LEE >>>> >>>>> On Wed, Jun 6, 2018, 17:27 Andrew Glasbrenner <
[email protected]> wrote:
>>>>> You've discovered one of the reasons full duplex is best on the
FM sats...you have no idea if you are getting through, because you
can't
hear while transmitting.
>>>>> >>>>> Got another radio so you can work full duplex? >>>>> >>>>> 73, Drew KO4MA >>>>> >>>>> -----Original Message----- >>>>> From: AMSAT-BB [email protected] On Behalf Of Hugo
Dominguez, Jr.
>>>>> Sent: Wednesday, June 06, 2018 7:41 PM >>>>> To: [email protected] >>>>> Subject: [amsat-bb] Unsuccessful Uplinks - AO-92 >>>>> >>>>> I’ve just started playing with talking on satellites. I’m able
to
hear all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on my Kenwood TH-D74, which I use with my Elk dual band
periodic
log antenna. However no one can hear me or responds to me. I’ve only
been
successful with my uplink (being heard) on AO-91 on several passes. I triple checked my frequencies on my radio and the 67 Hz tone and they
are
set as follows:
>>>>> Sat. Xmit Tone >>>>> SO-50 145.850 67.0 Hz >>>>> AO-85 435.170 67.0 Hz >>>>> AO-91 435.250 67.0 HZ >>>>> AO-92 435.350 67.0 Hz >>>>> These are the frequencies used when the bird is at its peak. I
adjust for doppler on 440 by starting out 10 khz less, e.g AO-85
435.160,
435.165, 435.170, 435.175, 435.180.
>>>>> >>>>> Any ideas if something has changed from what is published or
am I
missing something? Like I said, i’ve been able to communicate on AO-91.
>>>>> >>>>> — >>>>> Hugo Dominguez, Jr. >>>>> _______________________________________________ >>>>> Sent via [email protected]. AMSAT-NA makes this open forum
available to all interested persons worldwide without requiring
membership.
Opinions expressed are solely those of the author, and do not reflect
the
official views of AMSAT-NA.
>>>>> Not an AMSAT-NA member? Join now to support the amateur
satellite
program!
>>>>> Subscription settings:
http://www.amsat.org/mailman/listinfo/amsat-bb
>>>>> >>>>> _______________________________________________ >>>>> Sent via [email protected]. AMSAT-NA makes this open forum
available
>>>>> to all interested persons worldwide without requiring
membership.
Opinions expressed
>>>>> are solely those of the author, and do not reflect the official
views of AMSAT-NA.
>>>>> Not an AMSAT-NA member? Join now to support the amateur
satellite
program!
>>>>> Subscription settings:
http://www.amsat.org/mailman/listinfo/amsat-bb
> _______________________________________________ > Sent via [email protected]. AMSAT-NA makes this open forum
available
> to all interested persons worldwide without requiring membership.
Opinions expressed
> are solely those of the author, and do not reflect the official
views
of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite
program!
> Subscription settings:
http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views
of
AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite
program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
On 6/7/2018 12:04, Hugo Dominguez, Jr. wrote:
Someone mentioned to me that AO-91 was made to be worked by handhelds. They also mentioned that AO-85 actually has a damaged receive antenna and that you need more power. Is that correct?
I talk about AO-85's hearing problem along with some images, in my YouTube video "The Good and The Bad With AO-91" https://youtu.be/no4pHx02lSI
Jerry Buxton, NØJY
Daniel, et al, There might be a bit of confusion about the references used in various posts: note below where one talks about transmit frequency and another talks about receive frequency. The behavior of any satellite's radio signals is always the same, regardless of which band is uplinked and which band is downlinked. To (hopefully) clarify this topic, please note: - Receive frequency is higher at AOS (satellite is approaching you) and drifts lower towards LOS (going away from you) - Transmit frequency must be tuned lower at AOS and is adjusted/tuned higher towards LOS (to match satellite's receiver)
The receive tuning is fairly apparent as you can hear the satellite, but the amount of transmit "adjustment" isn't, especially if you don't have a full duplex radio (as Drew suggests, may be a good investment in stress reduction). The various tables published for the satellites list suggested frequencies, and these are handy if you are adept at changing memories quickly. If you want to (or have to) do it manually, you could use this as a guide: UHF +/- 10 kHz and VHF +/- 3 kHz for a full/high pass of near 90 degrees elevation (at a TCA of only 45 degrees, use half of those shift frequencies... start in the middle of your memory set). Many suggest leaving the VHF uplink at a center frequency: that is convenient but my experience is your signal is not nearly as likely to be successful in a crowded pass (the satellite receiver picks the biggest dog in the pack to repeat).
If you are chasing grids, try very low passes (less than 20 degrees at TCA), use a high gain directional antenna or stand directly in front of your car as a useful reflector (truck beds especially good for this), and just tune the center of the band for both T & R.
73, Jerry, K5OE/G
-----Original Message----- From: AMSAT-BB [email protected] On Behalf Of Hugo Dominguez, Jr. Sent: Thursday, June 7, 2018 5:50 AM To: Daniel Wight [email protected] Cc: [email protected] Subject: Re: [amsat-bb] Unsuccessful Uplinks - AO-92
Thanks. All the web pages I read said to perform doppler shift by starting 10 kHz below and work your way up. Even this amsat website has instructions to do it how I am doing it: https://amsat-uk.org/2018/01/26/ao-92-open-for-amateur-radio-use/
I also just noticed that there is a schedule for the L-band for uplink which i’m interpreting that UHF won’t work when the bird is setup for the L-band for uplink. Maybe I was trying to make contact when it was on the L band.
— Hugo Dominguez, Jr.
On Jun 6, 2018, at 21:07, Daniel Wight [email protected] wrote:
Seems like your Doppler shift might be opposite. I normally start high & work my way down during the satellite pass... (For instance, I would start at 435.180 for AO-85 and then work my way down to 435.160 as the satellite 'sunsets' on my horizon). Doppler shift should be higher frequency during approach, near zero when the satellite is overhead, and lower after the satellite passes.
73,
Daniel, KD7LEE
On Wed, Jun 6, 2018, 17:27 Andrew Glasbrenner [email protected] wrote: You've discovered one of the reasons full duplex is best on the FM sats...you have no idea if you are getting through, because you can't hear while transmitting.
Got another radio so you can work full duplex?
73, Drew KO4MA
-----Original Message----- From: AMSAT-BB [email protected] On Behalf Of Hugo Dominguez, Jr. Sent: Wednesday, June 06, 2018 7:41 PM To: [email protected] Subject: [amsat-bb] Unsuccessful Uplinks - AO-92
I’ve just started playing with talking on satellites. I’m able to hear all the satellites (AO-85, AO-91, AO-92 and SO-50) that I have programmed on my Kenwood TH-D74, which I use with my Elk dual band periodic log antenna. However no one can hear me or responds to me. I’ve only been successful with my uplink (being heard) on AO-91 on several passes. I triple checked my frequencies on my radio and the 67 Hz tone and they are set as follows: Sat. Xmit Tone SO-50 145.850 67.0 Hz AO-85 435.170 67.0 Hz AO-91 435.250 67.0 HZ AO-92 435.350 67.0 Hz These are the frequencies used when the bird is at its peak. I adjust for doppler on 440 by starting out 10 khz less, e.g AO-85 435.160, 435.165, 435.170, 435.175, 435.180.
Any ideas if something has changed from what is published or am I missing something? Like I said, i’ve been able to communicate on AO-91.
— Hugo Dominguez, Jr. _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
_______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
participants (12)
-
Adrian Engele -
Andrew Glasbrenner -
Daniel Wight -
Don KB2YSI -
Gabriel Zeifman -
Hugo Dominguez, Jr. -
Jean Marc Momple -
Jerry Buxton -
John Brier -
k5oe＠aol.com -
Patrick STODDARD (WD9EWK/VA7EWK) -
Rolf Krogstad