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 kb2ysi@gmail.com 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. hugois@gmail.com 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 kb2ysi@gmail.com 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 jean.marc.momple@gmail.com 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. hugois@gmail.com
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 <
jean.marc.momple@gmail.com>
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. hugois@gmail.com
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 kd7lee@gmail.com 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. hugois@gmail.com
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 kd7lee@gmail.com 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 <
glasbrenner@mindspring.com> 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 amsat-bb-bounces@amsat.org On Behalf Of Hugo
Dominguez, Jr.
>>>> Sent: Wednesday, June 06, 2018 7:41 PM >>>> To: amsat-bb@amsat.org >>>> 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 AMSAT-BB@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.
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>>>> >>>> _______________________________________________ >>>> Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum
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>>>> to all interested persons worldwide without requiring
membership.
Opinions expressed
>>>> are solely those of the author, and do not reflect the official
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>>>> Not an AMSAT-NA member? Join now to support the amateur
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Sent via AMSAT-BB@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!
Subscription settings: http://www.amsat.org/mailman/
listinfo/amsat-bb
Sent via AMSAT-BB@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!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@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! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb