[amsat-bb] Unsuccessful Uplinks - AO-92

Fri Jun 8 13:10:56 UTC 2018

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 at 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 at 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 at 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 at 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 at 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 at 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 at 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 at 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 at 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 at 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 at amsat.org> On Behalf Of Hugo
>> Dominguez, Jr.
>> >>>>>>> Sent: Wednesday, June 06, 2018 7:41 PM
>> >>>>>>> To: amsat-bb at 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.
>> >>>>>>> _______________________________________________
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>> official views of AMSAT-NA.
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>> >>>>>>>
>> >>>>>>> _______________________________________________
>> >>>>>>> Sent via AMSAT-BB at 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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>> >>> _______________________________________________
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>> >>> to all interested persons worldwide without requiring membership.
>> Opinions expressed
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>> of AMSAT-NA.
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>>
>> _______________________________________________
>> Sent via AMSAT-BB at 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
>>
>