Such a simple question but I am a loss finding an answer. I've searched many of the AMSAT Journals and only found photos of people using HT's. I looked at "Getting Started" which did list some HT's, but I suspect that booklet may be dated.
So, which HT's are being commonly used by members NOW??
If you wish, to avoid clogging the BB, you may answer directly.
73 & Happy New Year Jerry AB5R
Gerald Patrick WD9EWK has a pretty comprehensive list on his web site.Here is a link to the list:https://linksharing.samsungcloud.com/hr12h4v1M3Wn73Rick Tejera (K7TEJ)Saguaro Astronomy ClubWww.saguaroastro.orgThunderbird Astronomy ClubWww.w7tbc.org -------- Original message --------From: Gerald Payton [email protected] Date: 1/2/21 09:43 (GMT-07:00) To: [email protected] Subject: [AMSAT-BB] Popular HT's for satellite work
Such a simple question but I am a loss finding an answer. I've searched many of the AMSAT Journals and only found photos of people using HT's. I looked at "Getting Started" which did list some HT's, but I suspect that booklet may be dated.
So, which HT's are being commonly used by members NOW??
If you wish, to avoid clogging the BB, you may answer directly.
73 & Happy New Year
Jerry AB5R
But remember that the spreadsheet only lists "A" (US) models. The "E" variant (European) models will all transmit 430-440MHz without modification.
On 02/01/2021 12:26 saguaroastro <[email protected]> wrote: Gerald Patrick WD9EWK has a pretty comprehensive list on his web site. Here is a link to the list: https://linksharing.samsungcloud.com/hr12h4v1M3Wn 73 Rick Tejera (K7TEJ) Saguaro Astronomy Club Www.saguaroastro.org Thunderbird Astronomy Club Www.w7tbc.org -------- Original message -------- From: Gerald Payton <[email protected]> Date: 1/2/21 09:43 (GMT-07:00) To: [email protected] Subject: [AMSAT-BB] Popular HT's for satellite work Such a simple question but I am a loss finding an answer. I've searched many of the AMSAT Journals and only found photos of people using HT's. I looked at "Getting Started" which did list some HT's, but I suspect that booklet may be dated. So, which HT's are being commonly used by members NOW?? If you wish, to avoid clogging the BB, you may answer directly. 73 & Happy New Year Jerry AB5R ----------------------------------------------------------- Sent via AMSAT-BB(a)amsat.org. 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! View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] To unsubscribe send an email to amsat-bb-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org
Nigel A. Gunn, ///shoulders.outwards.resolutions tel +1-937-971-0366 Amateur Radio G8IFF W8IFF and GMRS WRBV701, e-mail [email protected] www http://www.ngunn.net
Nigel,
My spreadsheet that K7TEJ mentioned does not only address US versions of different radios. Where I know - or expect - a modification is needed, I have noted that. This was something Icom and Kenwood did in the 1990s and into the early 2000s with their VHF/UHF FM mobiles and handheld radios. Thankfully, those radios now cover at least 430-450 MHz in the 70cm band, if not the full 30 MHz band - ending the need for that modification.
That spreadsheet is not the definitive source for lists of radios capable of full-duplex operating. I believe there were many Standard HTs and mobile radios that could do that, but I don't have details on which models. There could be other radios from the traditional amateur equipment manufacturers that are also capable of full-duplex operation. I'm happy to add to what I already have, if I become aware of other models that can do this.
73!
Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/ Twitter: @WD9EWK or http://twitter.com/WD9EWK
On Sat, Jan 2, 2021 at 6:39 PM Nigel A. Gunn G8IFF/W8IFF [email protected] wrote:
But remember that the spreadsheet only lists "A" (US) models. The "E" variant (European) models will all transmit 430-440MHz without modification.
I have found using 2 HTs, the best receiver goes on RX, and a filter, BLP-200+, MFJ-916B, etc..., to prevent desensitization works very well.
There is a good case to be made for the IC-2730A, as it is full duplex and can do more than 5w if needed. Cost wise, it is similar to 2 decent HTs, so that is another option too.
On Sat, Jan 2, 2021, 11:44 Gerald Payton [email protected] wrote:
Such a simple question but I am a loss finding an answer. I've searched many of the AMSAT Journals and only found photos of people using HT's. I looked at "Getting Started" which did list some HT's, but I suspect that booklet may be dated.
So, which HT's are being commonly used by members NOW??
If you wish, to avoid clogging the BB, you may answer directly.
73 & Happy New Year Jerry AB5R
Sent via AMSAT-BB(a)amsat.org. 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!
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Another good solution for filtering transmit and receivers is a pair of duplexers. Put one on the 2 m side and one on the 70 cm side with separate feeds to two radios. you can create pretty good isolation between the two radios and avoid defense even on 70 cm with 2 m up. Just make sure you have a 70 CM Radio that has one of the better receivers so it is not just affected by the ambient RF field.
73 Tom N5HYP Sent from my iPhone
On Jan 2, 2021, at 12:14, Don KB2YSI [email protected] wrote:
I have found using 2 HTs, the best receiver goes on RX, and a filter, BLP-200+, MFJ-916B, etc..., to prevent desensitization works very well.
There is a good case to be made for the IC-2730A, as it is full duplex and can do more than 5w if needed. Cost wise, it is similar to 2 decent HTs, so that is another option too.
On Sat, Jan 2, 2021, 11:44 Gerald Payton [email protected] wrote: Such a simple question but I am a loss finding an answer. I've searched many of the AMSAT Journals and only found photos of people using HT's. I looked at "Getting Started" which did list some HT's, but I suspect that booklet may be dated.
So, which HT's are being commonly used by members NOW??
If you wish, to avoid clogging the BB, you may answer directly.
73 & Happy New Year Jerry AB5R
Sent via AMSAT-BB(a)amsat.org. 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!
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I am receiving multiple email comments referring to "Better or Best" HT receiver when using dual (two) HT's. Nobody has suggested which T they think is the better on U or V reception. (That excludes desensing or filtering.)
________________________________ From: Tom Schuessler via AMSAT-BB [email protected] Sent: Saturday, January 2, 2021 1:32 PM To: Don KB2YSI [email protected] Cc: AMSAT BB [email protected] Subject: [AMSAT-BB] Re: Popular HT's for satellite work
Another good solution for filtering transmit and receivers is a pair of duplexers. Put one on the 2 m side and one on the 70 cm side with separate feeds to two radios. you can create pretty good isolation between the two radios and avoid defense even on 70 cm with 2 m up. Just make sure you have a 70 CM Radio that has one of the better receivers so it is not just affected by the ambient RF field.
73 Tom N5HYP Sent from my iPhone
On Jan 2, 2021, at 12:14, Don KB2YSI [email protected] wrote:
I have found using 2 HTs, the best receiver goes on RX, and a filter, BLP-200+, MFJ-916B, etc..., to prevent desensitization works very well.
There is a good case to be made for the IC-2730A, as it is full duplex and can do more than 5w if needed. Cost wise, it is similar to 2 decent HTs, so that is another option too.
On Sat, Jan 2, 2021, 11:44 Gerald Payton <[email protected]mailto:[email protected]> wrote: Such a simple question but I am a loss finding an answer. I've searched many of the AMSAT Journals and only found photos of people using HT's. I looked at "Getting Started" which did list some HT's, but I suspect that booklet may be dated.
So, which HT's are being commonly used by members NOW??
If you wish, to avoid clogging the BB, you may answer directly.
73 & Happy New Year Jerry AB5R
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There is no best. The best radio is the one already in your hand.
On 02/01/2021 14:40 Gerald Payton <[email protected]> wrote: I am receiving multiple email comments referring to "Better or Best" HT receiver when using dual (two) HT's. Nobody has suggested which T they think is the better on U or V reception.
When you are working weak signal FM always look for -
(a) most sensitive receiver i.e. 0.16 micro-volts, lesser is "best" (b) spurious and image rejection ratio of 60 dB or so, more is "better"
As you know FM works best with strong signals... 73!Umesh, k6vug
On Saturday, January 2, 2021, 11:40:52 AM PST, Gerald Payton [email protected] wrote:
I am receiving multiple email comments referring to "Better or Best" HT receiver when using dual (two) HT's. Nobody has suggested which T they think is the better on U or V reception. (That excludes desensing or filtering.) From: Tom Schuessler via AMSAT-BB [email protected] Sent: Saturday, January 2, 2021 1:32 PM To: Don KB2YSI [email protected] Cc: AMSAT BB [email protected] Subject: [AMSAT-BB] Re: Popular HT's for satellite work Another good solution for filtering transmit and receivers is a pair of duplexers. Put one on the 2 m side and one on the 70 cm side with separate feeds to two radios. you can create pretty good isolation between the two radios and avoid defense even on 70 cm with 2 m up. Just make sure you have a 70 CM Radio that has one of the better receivers so it is not just affected by the ambient RF field.
73 Tom N5HYP Sent from my iPhone
On Jan 2, 2021, at 12:14, Don KB2YSI [email protected] wrote:
I have found using 2 HTs, the best receiver goes on RX, and a filter, BLP-200+, MFJ-916B, etc..., to prevent desensitization works very well. There is a good case to be made for the IC-2730A, as it is full duplex and can do more than 5w if needed. Cost wise, it is similar to 2 decent HTs, so that is another option too. On Sat, Jan 2, 2021, 11:44 Gerald Payton [email protected] wrote:
Such a simple question but I am a loss finding an answer. I've searched many of the AMSAT Journals and only found photos of people using HT's. I looked at "Getting Started" which did list some HT's, but I suspect that booklet may be dated. So, which HT's are being commonly used by members NOW?? If you wish, to avoid clogging the BB, you may answer directly. 73 & Happy New YearJerry AB5R
-----------------------------------------------------------
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There is no currently manufactured HT that does both V/U and U/V modes well for us. The Kenwood TH-D723a did - but was recently discontinued by Kenwood.
SO … Use two Has! Use your “better” one for receive, and another for transmit!
And although it is preferable to work true, full-duplex (where you can hear the downlink (earpiece. headset) while you key the mic and transmit, out is NOT absolutely necessary. Better because you can make sure you’re hitting the satellites;;site and also knowing you are not accidentally stepping on someone … but not absolutely mandatory.
If you find that the two-HT method causes de-sense on one unit, separate the antennas a bit. Get a second person involved!
Some fun (and gain-fun) DIY antenna projects on the ANTENNAS page at …
http://www.work-sat.com http://www.work-sat.com/
There’s also links there for not only working the “easy” FM voice birds, but also SSB satellites.
Clint Bradford K6LCS 909-999-SATS
On Jan 2, 2021, at 8:43 AM, Gerald Payton <[email protected] mailto:[email protected]> wrote:
Such a simple question but I am a loss finding an answer.
My go-to satellite HT is the Kenwood TH-D72a, although I've also used the Alinco DJ-G7T. The Kenwood has less de-sense. As others have mentioned, using two HT's is also a good option, but depending on the type of antenna you're using might require a diplexer or bandpass filters. I would go with two HT's before resorting to working half-duplex.
-Stephen N8URE
Jerry:
WD9EWK's info is probably the best overall (he has looked into this a lot). That said; the best recent-manufacture full-duplex dual band HT is the Kenwood DH72. I personally prefer 2 separate HTs (it eliminates any challenges with hitting the wrong buttons). I've used 2 Yaesu HTs I've had on-hand, a VX5 and a VX8. The biggest challenge has been rigging a wiring harness to allow me to use a headset with 2 separate radios (many HT-oriented headsets mold the RX audio into the same connector; the Heil BM17 series is much better in that regards) and put an audio recorder in-line or in parallel with RX audio (while it would be nice to hear my TX audio at a proper volume, if I make it through the satellite, the d/l us good enough for logging the QSO afterwards). To make it easier to manage them, I modified a small clipboard to hold the 2 radios and an old Android phone running tracking software from a camera strap; this makes it a lot easier to manage the antenna, radios, etc without running out of hands!
I'd say any recent manufacture Icom, Kenwood, or Yaesu HT will work well. The Baofengs, etc. seem to be mostly prone to RX desense, especially on mode VU Birds (SO50, AO27, LilacSat2 (when operating)). Less of an issue on AO91, 92, PO101.
Another option: Older smaller dual-band mobile rigs that are full duplex. Kenwood TM700 and older 710s (before GPS was integrated into the radio). Ability to go to 5 or 25w handy on rough passes. With radios like the 700 and 710 that have detachable front panels, you could stuff a battery and the main unit in a shoulder bag or backpack and mount the control head on a chest harness or strap. Or run the whole thing from a table mount, up to you. You do give up portability vs HTs.
If you already have an HT, use it and get another for the 2nd band. Clint's had good success with older Yaesus, per his work-sat web pages.
If you use a single full-duplex radio, you will need a diplexer to split the VHF and UHF sides for antennas like an Arrow (unless you buy the version with a built in diplexer and keep power under 10W!). Or use a single-input dual band antenna like the Elk. If home brewing, simplest is a pair of 2M and 70cm yagis, Arrow style. The WA5VJB "Cheap Yagi's" are very easy to make, trick is making them light enough if you want to hand hold them. If you use a tripod, ability to quickly adjust polarization to match the satellite is essential - I can null out a downlink by twisting my Arrow the "wrong" way.
Hope this helps, there are several experienced operators responding to your email.
73 Steve KS1G
On Sat, Jan 2, 2021 at 11:44 AM Gerald Payton [email protected] wrote:
Such a simple question but I am a loss finding an answer. I've searched many of the AMSAT Journals and only found photos of people using HT's. I looked at "Getting Started" which did list some HT's, but I suspect that booklet may be dated.
So, which HT's are being commonly used by members NOW??
If you wish, to avoid clogging the BB, you may answer directly.
73 & Happy New Year Jerry AB5R
Sent via AMSAT-BB(a)amsat.org. 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!
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I use 2 radios, even while I had a D72. The external recorder, headset, coax tangle was more than enough to push me away from the D72 so I sold it.
I use a TH-D74a on RX, FM and SSB, and an IC-7100 for TX. The build-in recorder on the D74a eliminates a few cables and a whole device from the setup.
As a thread on a VHF contest list just said, "it is your station, do want best fits you!".
On Sat, Jan 2, 2021, 21:41 Stephan Greene [email protected] wrote:
Jerry:
WD9EWK's info is probably the best overall (he has looked into this a lot). That said; the best recent-manufacture full-duplex dual band HT is the Kenwood DH72. I personally prefer 2 separate HTs (it eliminates any challenges with hitting the wrong buttons). I've used 2 Yaesu HTs I've had on-hand, a VX5 and a VX8. The biggest challenge has been rigging a wiring harness to allow me to use a headset with 2 separate radios (many HT-oriented headsets mold the RX audio into the same connector; the Heil BM17 series is much better in that regards) and put an audio recorder in-line or in parallel with RX audio (while it would be nice to hear my TX audio at a proper volume, if I make it through the satellite, the d/l us good enough for logging the QSO afterwards). To make it easier to manage them, I modified a small clipboard to hold the 2 radios and an old Android phone running tracking software from a camera strap; this makes it a lot easier to manage the antenna, radios, etc without running out of hands!
I'd say any recent manufacture Icom, Kenwood, or Yaesu HT will work well. The Baofengs, etc. seem to be mostly prone to RX desense, especially on mode VU Birds (SO50, AO27, LilacSat2 (when operating)). Less of an issue on AO91, 92, PO101.
Another option: Older smaller dual-band mobile rigs that are full duplex. Kenwood TM700 and older 710s (before GPS was integrated into the radio). Ability to go to 5 or 25w handy on rough passes. With radios like the 700 and 710 that have detachable front panels, you could stuff a battery and the main unit in a shoulder bag or backpack and mount the control head on a chest harness or strap. Or run the whole thing from a table mount, up to you. You do give up portability vs HTs.
If you already have an HT, use it and get another for the 2nd band. Clint's had good success with older Yaesus, per his work-sat web pages.
If you use a single full-duplex radio, you will need a diplexer to split the VHF and UHF sides for antennas like an Arrow (unless you buy the version with a built in diplexer and keep power under 10W!). Or use a single-input dual band antenna like the Elk. If home brewing, simplest is a pair of 2M and 70cm yagis, Arrow style. The WA5VJB "Cheap Yagi's" are very easy to make, trick is making them light enough if you want to hand hold them. If you use a tripod, ability to quickly adjust polarization to match the satellite is essential - I can null out a downlink by twisting my Arrow the "wrong" way.
Hope this helps, there are several experienced operators responding to your email.
73 Steve KS1G
On Sat, Jan 2, 2021 at 11:44 AM Gerald Payton [email protected] wrote:
Such a simple question but I am a loss finding an answer. I've searched many of the AMSAT Journals and only found photos of people using HT's. I looked at "Getting Started" which did list some HT's, but I suspect that booklet may be dated.
So, which HT's are being commonly used by members NOW??
If you wish, to avoid clogging the BB, you may answer directly.
73 & Happy New Year Jerry AB5R
Sent via AMSAT-BB(a)amsat.org. 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!
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--
Steve Greene [email protected] <kay ess one gee zero four>@gmail.com
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FYI, Kenwood D72A and D74 are both reportedly discontinued due to a fire at a key parts manufacturer overseas and this has a affected a lot of companies that relied on the AK2330 DAC. I still see the radio for sale at Gigaparts however. Some websites are listing it as discontinued. Excellent HTs
Discussed here
https://www.reddit.com/r/amateurradio/comments/k475ko/well_it_looks_like_the...
https://www.reddit.com/r/amateurradio/comments/k6ebc2/what_happened_to_exist...
https://www.audioholics.com/news/fire-destroys-akm-audio-chip-factory
https://www.hamlife.jp/2020/12/24/jvckenwood-thd74-discontinued/
On Sat, Jan 2, 2021 at 11:15 PM Don KB2YSI [email protected] wrote:
I use 2 radios, even while I had a D72. The external recorder, headset, coax tangle was more than enough to push me away from the D72 so I sold it.
I use a TH-D74a on RX, FM and SSB, and an IC-7100 for TX. The build-in recorder on the D74a eliminates a few cables and a whole device from the setup.
As a thread on a VHF contest list just said, "it is your station, do want best fits you!".
On Sat, Jan 2, 2021, 21:41 Stephan Greene [email protected] wrote:
Jerry:
WD9EWK's info is probably the best overall (he has looked into this a lot). That said; the best recent-manufacture full-duplex dual band HT is the Kenwood DH72. I personally prefer 2 separate HTs (it eliminates any challenges with hitting the wrong buttons). I've used 2 Yaesu HTs I've had on-hand, a VX5 and a VX8. The biggest challenge has been rigging a wiring harness to allow me to use a headset with 2 separate radios (many HT-oriented headsets mold the RX audio into the same connector; the Heil BM17 series is much better in that regards) and put an audio recorder in-line or in parallel with RX audio (while it would be nice to hear my TX audio at a proper volume, if I make it through the satellite, the d/l us good enough for logging the QSO afterwards). To make it easier to manage them, I modified a small clipboard to hold the 2 radios and an old Android phone running tracking software from a camera strap; this makes it a lot easier to manage the antenna, radios, etc without running out of hands!
I'd say any recent manufacture Icom, Kenwood, or Yaesu HT will work well. The Baofengs, etc. seem to be mostly prone to RX desense, especially on mode VU Birds (SO50, AO27, LilacSat2 (when operating)). Less of an issue on AO91, 92, PO101.
Another option: Older smaller dual-band mobile rigs that are full duplex. Kenwood TM700 and older 710s (before GPS was integrated into the radio). Ability to go to 5 or 25w handy on rough passes. With radios like the 700 and 710 that have detachable front panels, you could stuff a battery and the main unit in a shoulder bag or backpack and mount the control head on a chest harness or strap. Or run the whole thing from a table mount, up to you. You do give up portability vs HTs.
If you already have an HT, use it and get another for the 2nd band. Clint's had good success with older Yaesus, per his work-sat web pages.
If you use a single full-duplex radio, you will need a diplexer to split the VHF and UHF sides for antennas like an Arrow (unless you buy the version with a built in diplexer and keep power under 10W!). Or use a single-input dual band antenna like the Elk. If home brewing, simplest is a pair of 2M and 70cm yagis, Arrow style. The WA5VJB "Cheap Yagi's" are very easy to make, trick is making them light enough if you want to hand hold them. If you use a tripod, ability to quickly adjust polarization to match the satellite is essential - I can null out a downlink by twisting my Arrow the "wrong" way.
Hope this helps, there are several experienced operators responding to your email.
73 Steve KS1G
On Sat, Jan 2, 2021 at 11:44 AM Gerald Payton [email protected] wrote:
Such a simple question but I am a loss finding an answer. I've searched many of the AMSAT Journals and only found photos of people using HT's. I looked at "Getting Started" which did list some HT's, but I suspect that booklet may be dated.
So, which HT's are being commonly used by members NOW??
If you wish, to avoid clogging the BB, you may answer directly.
73 & Happy New Year Jerry AB5R
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I forgot to mention it in this post that you need to use a filter on a 2 radio setup to prevent desensitization.
Mini-circuits BLP-200 and MFJ-916B are 2 that I have used, and I know there are other options.
On Sat, Jan 2, 2021, 23:14 Don KB2YSI [email protected] wrote:
I use 2 radios, even while I had a D72. The external recorder, headset, coax tangle was more than enough to push me away from the D72 so I sold it.
I use a TH-D74a on RX, FM and SSB, and an IC-7100 for TX. The build-in recorder on the D74a eliminates a few cables and a whole device from the setup.
As a thread on a VHF contest list just said, "it is your station, do want best fits you!".
On Sat, Jan 2, 2021, 21:41 Stephan Greene [email protected] wrote:
Jerry:
WD9EWK's info is probably the best overall (he has looked into this a lot). That said; the best recent-manufacture full-duplex dual band HT is the Kenwood DH72. I personally prefer 2 separate HTs (it eliminates any challenges with hitting the wrong buttons). I've used 2 Yaesu HTs I've had on-hand, a VX5 and a VX8. The biggest challenge has been rigging a wiring harness to allow me to use a headset with 2 separate radios (many HT-oriented headsets mold the RX audio into the same connector; the Heil BM17 series is much better in that regards) and put an audio recorder in-line or in parallel with RX audio (while it would be nice to hear my TX audio at a proper volume, if I make it through the satellite, the d/l us good enough for logging the QSO afterwards). To make it easier to manage them, I modified a small clipboard to hold the 2 radios and an old Android phone running tracking software from a camera strap; this makes it a lot easier to manage the antenna, radios, etc without running out of hands!
I'd say any recent manufacture Icom, Kenwood, or Yaesu HT will work well. The Baofengs, etc. seem to be mostly prone to RX desense, especially on mode VU Birds (SO50, AO27, LilacSat2 (when operating)). Less of an issue on AO91, 92, PO101.
Another option: Older smaller dual-band mobile rigs that are full duplex. Kenwood TM700 and older 710s (before GPS was integrated into the radio). Ability to go to 5 or 25w handy on rough passes. With radios like the 700 and 710 that have detachable front panels, you could stuff a battery and the main unit in a shoulder bag or backpack and mount the control head on a chest harness or strap. Or run the whole thing from a table mount, up to you. You do give up portability vs HTs.
If you already have an HT, use it and get another for the 2nd band. Clint's had good success with older Yaesus, per his work-sat web pages.
If you use a single full-duplex radio, you will need a diplexer to split the VHF and UHF sides for antennas like an Arrow (unless you buy the version with a built in diplexer and keep power under 10W!). Or use a single-input dual band antenna like the Elk. If home brewing, simplest is a pair of 2M and 70cm yagis, Arrow style. The WA5VJB "Cheap Yagi's" are very easy to make, trick is making them light enough if you want to hand hold them. If you use a tripod, ability to quickly adjust polarization to match the satellite is essential - I can null out a downlink by twisting my Arrow the "wrong" way.
Hope this helps, there are several experienced operators responding to your email.
73 Steve KS1G
On Sat, Jan 2, 2021 at 11:44 AM Gerald Payton [email protected] wrote:
Such a simple question but I am a loss finding an answer. I've searched many of the AMSAT Journals and only found photos of people using HT's. I looked at "Getting Started" which did list some HT's, but I suspect that booklet may be dated.
So, which HT's are being commonly used by members NOW??
If you wish, to avoid clogging the BB, you may answer directly.
73 & Happy New Year Jerry AB5R
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--
Steve Greene [email protected] <kay ess one gee zero four>@gmail.com
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Don, I have considered the Minicircuit BLP-200 for use in my two radio set-up, but Minicircuits rates it for a maximum input power of 0.5 W. Do you transmit through it with a full 5 W or do you bypass it for transmitting or ???
Steve AI9IN
----- Original Message ----- From: Don KB2YSI ([email protected]) Date: 01/03/21 09:02 To: Stephan Greene ([email protected]) Cc: Gerald Payton ([email protected]), AMSAT BB ([email protected]) Subject: [AMSAT-BB] Re: Popular HT's for satellite work
I forgot to mention it in this post that you need to use a filter on a 2 radio setup to prevent desensitization. Mini-circuits BLP-200 and MFJ-916B are 2 that I have used, and I know there are other options.
Steve, It's been extensively discussed on Twitter @AMSAT a while back and I can relate from using my FT-1634 setup using the BLP-200, it is a non-issue for SSB and FM at 5W Dual HTs will be fine. Many rovers are currently using it with no issues with more than 5W power. Obviously not recommended for high power use!!!
73, Adrian AA5UK
On Sunday, January 3, 2021, 8:42:56 AM CST, Steve Kristoff [email protected] wrote:
Don,I have considered the Minicircuit BLP-200 for use in my two radio set-up, but Minicircuits rates it for a maximum input power of 0.5 W. Do you transmit through it with a full 5 W or do you bypass it for transmitting or ??? Steve AI9IN ----- Original Message -----From: Don KB2YSI ([email protected]) Date: 01/03/21 09:02 To: Stephan Greene ([email protected]) Cc: Gerald Payton ([email protected]), AMSAT BB ([email protected]) Subject: [AMSAT-BB] Re: Popular HT's for satellite work I forgot to mention it in this post that you need to use a filter on a 2 radio setup to prevent desensitization. Mini-circuits BLP-200 and MFJ-916B are 2 that I have used, and I know there are other options. -----------------------------------------------------------
Sent via AMSAT-BB(a)amsat.org. 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!
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At least 70 watts has gone through mine, when a few of us at the AMSAT demo station at Dayton in 2019 hooked up an IC-910. Still works great!
I have used mine with 30 watts quite frequently over the past two years that I’ve had it and it still works fine.
I think the power rating assumes a more broadband application where a significant amount of RF is being attenuated. When you’re using it to cut off the third harmonic from a transmitter, you’re really only asking it to block and convert to heat a few milliwatts of RF at most, the rest is passing through.
73,
Paul, N8HM
On Sun, Jan 3, 2021 at 13:44 Adrian Engele via AMSAT-BB [email protected] wrote:
Steve,
It's been extensively discussed on Twitter @AMSAT a while back and I can relate from using my FT-1634 setup using the BLP-200, it is a non-issue for SSB and FM at 5W
Dual HTs will be fine. Many rovers are currently using it with no issues with more than 5W power. Obviously not recommended for high power use!!!
73, Adrian AA5UK
On Sunday, January 3, 2021, 8:42:56 AM CST, Steve Kristoff < [email protected]> wrote:
Don, I have considered the Minicircuit BLP-200 for use in my two radio set-up, but Minicircuits rates it for a maximum input power of 0.5 W. Do you transmit through it with a full 5 W or do you bypass it for transmitting or ???
Steve AI9IN
----- Original Message -----
From: Don KB2YSI ([email protected]) Date: 01/03/21 09:02 To: Stephan Greene ([email protected]) Cc: Gerald Payton ([email protected]), AMSAT BB ([email protected]) Subject: [AMSAT-BB] Re: Popular HT's for satellite work
I forgot to mention it in this post that you need to use a filter on a 2 radio setup to prevent desensitization.
Mini-circuits BLP-200 and MFJ-916B are 2 that I have used, and I know there are other options.
Sent via AMSAT-BB(a)amsat.org. 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!
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Thank you Paul and Adrian for the info, especially when it comes from your first-hand experience! Steve AI9IN
----- Original Message ----- From: Paul Stoetzer ([email protected]) Date: 01/03/21 13:59 To: Adrian Engele ([email protected]) Cc: Steve Kristoff ([email protected]), [email protected] Subject: Re: [AMSAT-BB] Re: Popular HT's for satellite work
At least 70 watts has gone through mine, when a few of us at the AMSAT demo station at Dayton in 2019 hooked up an IC-910. Still works great! I have used mine with 30 watts quite frequently over the past two years that I've had it and it still works fine. I think the power rating assumes a more broadband application where a significant amount of RF is being attenuated. When you're using it to cut off the third harmonic from a transmitter, you're really only asking it to block and convert to heat a few milliwatts of RF at most, the rest is passing through. 73, Paul, N8HM
On Sun, Jan 3, 2021 at 13:44 Adrian Engele via AMSAT-BB [email protected] wrote:
Steve, It's been extensively discussed on Twitter @AMSAT a while back and I can relate from using my FT-1634 setup using the BLP-200, it is a non-issue for SSB and FM at 5W Dual HTs will be fine. Many rovers are currently using it with no issues with more than 5W power. Obviously not recommended for high power use!!! 73, Adrian AA5UK
On Sunday, January 3, 2021, 8:42:56 AM CST, Steve Kristoff [email protected] wrote:
Don, I have considered the Minicircuit BLP-200 for use in my two radio set-up, but Minicircuits rates it for a maximum input power of 0.5 W. Do you transmit through it with a full 5 W or do you bypass it for transmitting or ??? Steve AI9IN
----- Original Message ----- From: Don KB2YSI ([email protected]) Date: 01/03/21 09:02 To: Stephan Greene ([email protected]) Cc: Gerald Payton ([email protected]), AMSAT BB ([email protected]) Subject: [AMSAT-BB] Re: Popular HT's for satellite work
I forgot to mention it in this post that you need to use a filter on a 2 radio setup to prevent desensitization. Mini-circuits BLP-200 and MFJ-916B are 2 that I have used, and I know there are other options.
-----------------------------------------------------------
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-----------------------------------------------------------
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I have transmitted about 20w through the BLP-200 without issue. Others have done a but more also without issue. I have been using it for more than a year now. The weight savings over the MFJ-916B is pretty crazy. Since I do everything portable and handheld, saving weight in the setup is important.
On Sun, Jan 3, 2021, 09:42 Steve Kristoff [email protected] wrote:
Don, I have considered the Minicircuit BLP-200 for use in my two radio set-up, but Minicircuits rates it for a maximum input power of 0.5 W. Do you transmit through it with a full 5 W or do you bypass it for transmitting or ???
Steve AI9IN
----- Original Message -----
From: Don KB2YSI ([email protected]) Date: 01/03/21 09:02 To: Stephan Greene ([email protected]) Cc: Gerald Payton ([email protected]), AMSAT BB ([email protected]) Subject: [AMSAT-BB] Re: Popular HT's for satellite work
I forgot to mention it in this post that you need to use a filter on a 2 radio setup to prevent desensitization.
Mini-circuits BLP-200 and MFJ-916B are 2 that I have used, and I know there are other options.
Sent via AMSAT-BB(a)amsat.org. 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!
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Thanks to Don, too! Didn't see his reply until later.
Steve AI9IN
----- Original Message ----- From: Don KB2YSI ([email protected]) Date: 01/03/21 15:40 To: Steve Kristoff ([email protected]) Cc: AMSAT BB ([email protected]) Subject: [AMSAT-BB] Re: Popular HT's for satellite work
I have transmitted about 20w through the BLP-200 without issue. Others have done a but more also without issue. I have been using it for more than a year now. The weight savings over the MFJ-916B is pretty crazy. Since I do everything portable and handheld, saving weight in the setup is important. On Sun, Jan 3, 2021, 09:42 Steve Kristoff [email protected] wrote:
Don, I have considered the Minicircuit BLP-200 for use in my two radio set-up, but Minicircuits rates it for a maximum input power of 0.5 W. Do you transmit through it with a full 5 W or do you bypass it for transmitting or ???
Steve AI9IN
----- Original Message ----- From: Don KB2YSI ([email protected]) Date: 01/03/21 09:02 To: Stephan Greene ([email protected]) Cc: Gerald Payton ([email protected]), AMSAT BB ([email protected]) Subject: [AMSAT-BB] Re: Popular HT's for satellite work
I forgot to mention it in this post that you need to use a filter on a 2 radio setup to prevent desensitization. Mini-circuits BLP-200 and MFJ-916B are 2 that I have used, and I know there are other options.
-----------------------------------------------------------
Sent via AMSAT-BB(a)amsat.org. 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!
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-----------------------------------------------------------
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One more question. If I had a BLP-200 on the 2m side would it be useful to have high pass filter on the 70 cm side? If so, does anyone have a recommendation or experience with such a thing?
Steve AI9IN
----- Original Message ----- From: Steve Kristoff ([email protected]) Date: 01/03/21 15:55 To: Don KB2YSI ([email protected]) Cc: AMSAT BB ([email protected]) Subject: [AMSAT-BB] Re: Popular HT's for satellite work
Thanks to Don, too! Didn't see his reply until later.
Steve AI9IN ----- Original Message ----- From: Don KB2YSI ([email protected]) Date: 01/03/21 15:40 To: Steve Kristoff ([email protected]) Cc: AMSAT BB ([email protected]) Subject: [AMSAT-BB] Re: Popular HT's for satellite work
I have transmitted about 20w through the BLP-200 without issue. Others have done a but more also without issue. I have been using it for more than a year now. The weight savings over the MFJ-916B is pretty crazy. Since I do everything portable and handheld, saving weight in the setup is important. On Sun, Jan 3, 2021, 09:42 Steve Kristoff [email protected] wrote:
Don, I have considered the Minicircuit BLP-200 for use in my two radio set-up, but Minicircuits rates it for a maximum input power of 0.5 W. Do you transmit through it with a full 5 W or do you bypass it for transmitting or ???
Steve AI9IN
----- Original Message ----- From: Don KB2YSI ([email protected]) Date: 01/03/21 09:02 To: Stephan Greene ([email protected]) Cc: Gerald Payton ([email protected]), AMSAT BB ([email protected]) Subject: [AMSAT-BB] Re: Popular HT's for satellite work
I forgot to mention it in this post that you need to use a filter on a 2 radio setup to prevent desensitization. Mini-circuits BLP-200 and MFJ-916B are 2 that I have used, and I know there are other options.
-----------------------------------------------------------
Sent via AMSAT-BB(a)amsat.org. 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!
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-----------------------------------------------------------
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-----------------------------------------------------------
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Mini-Circuits BHP-400+. High Pass Filter, 395-3200 MHz. Same form factor as the BLP-200. Seems to help a little.
Steve KS1G
On Sun, Jan 3, 2021 at 6:00 PM Steve Kristoff [email protected] wrote:
One more question. If I had a BLP-200 on the 2m side would it be useful to have high pass filter on the 70 cm side? If so, does anyone have a recommendation or experience with such a thing?
Steve AI9IN
----- Original Message -----
From: Steve Kristoff ([email protected]) Date: 01/03/21 15:55 To: Don KB2YSI ([email protected]) Cc: AMSAT BB ([email protected]) Subject: [AMSAT-BB] Re: Popular HT's for satellite work
Thanks to Don, too! Didn't see his reply until later.
Steve AI9IN
----- Original Message -----
From: Don KB2YSI ([email protected]) Date: 01/03/21 15:40 To: Steve Kristoff ([email protected]) Cc: AMSAT BB ([email protected]) Subject: [AMSAT-BB] Re: Popular HT's for satellite work
I have transmitted about 20w through the BLP-200 without issue. Others have done a but more also without issue. I have been using it for more than a year now. The weight savings over the MFJ-916B is pretty crazy. Since I do everything portable and handheld, saving weight in the setup is important.
On Sun, Jan 3, 2021, 09:42 Steve Kristoff [email protected] wrote:
Don, I have considered the Minicircuit BLP-200 for use in my two radio set-up, but Minicircuits rates it for a maximum input power of 0.5 W. Do you transmit through it with a full 5 W or do you bypass it for transmitting or ???
Steve AI9IN
----- Original Message -----
From: Don KB2YSI ([email protected]) Date: 01/03/21 09:02 To: Stephan Greene ([email protected]) Cc: Gerald Payton ([email protected]), AMSAT BB ([email protected]) Subject: [AMSAT-BB] Re: Popular HT's for satellite work
I forgot to mention it in this post that you need to use a filter on a 2 radio setup to prevent desensitization.
Mini-circuits BLP-200 and MFJ-916B are 2 that I have used, and I know there are other options.
Sent via AMSAT-BB(a)amsat.org. 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!
View archives of this mailing list at https://mailman.amsat.org/hyperkitty/list/[email protected] To unsubscribe send an email to amsat-bb-leave(a)amsat.org Manage all of your AMSAT-NA mailing list preferences at https://mailman.amsat.org
Sent via AMSAT-BB(a)amsat.org. 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!
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Sent via AMSAT-BB(a)amsat.org. 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!
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Sent via AMSAT-BB(a)amsat.org. 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!
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participants (14)
-
Adrian Engele -
Brian Wilkins KO4AQF -
Clint Bradford -
Don KB2YSI -
Gerald Payton -
k6vug＠sbcglobal.net -
Nigel A. Gunn G8IFF/W8IFF -
Patrick STODDARD (WD9EWK/VA7EWK) -
Paul Stoetzer -
saguaroastro -
sjdevience＠gmail.com -
Stephan Greene -
Steve Kristoff -
Tom Schuessler