Hello Chris.
I listen daily to AO-73 to gather the telemetry data.
I use a 12 elements cross yagi and can switch between left CP or right CP.
At low elevations (between 0 and 10 degrees) I also suffer from deep
fadings where the signal is in the noise and then slowly coming back.
73,
Eric.
Amateur radio station ON4HF
Satellite manager UBA
Member Amsat-UK
Member Amsat-ON
Eric Knaps
Waterstraat 30
B-3980 Tessenderlo
Belgium
http://www.on4hf.be
Chris Thompson schreef op 5/05/2014 21:25:
I've also heard a very strong downlink of my signal on a couple of
occasions, but not had any replies. I am on the East Coast of the US in
Brooklyn.
That said, I get very deep fades with AO-73. I think the antennae are in
the x-y plane and are dipoles. They are therefore rotating as the
satellite rotates about Z. If you are using an arrow antenna, or similar,
then you get a deep null periodically and you can completely loose your
signal if you are not careful. Does a CP antenna help with this? Can
anyone using CP confirm?
I understand AO-73 rotates about once a minute, or once every two minutes.
So you should have a null every 30 seconds or so but it _seems_ worse than
that and it's enough to throw you off, especially if you have struggled to
find your signal in the narrow downlink in the first place.
Then of course it goes into sunlight and your signal pops out of
existence....
All in all, a tricky sat to work. I'm looking forward to my first contact
through it.
73
Chris
ac2cz
On Mon, May 5, 2014 at 2:18 PM, Paul Stoetzer <n...@arrl.net> wrote:
Agree. It isn't quite as loud or as easy to get a signal into as
VO-52, but it's very close.
I had a 70+ degree pass yesterday and my return signal was S8 with 500
mW to an Elk antenna. Unfortunately, all I heard were people trying to
find their signals until the end of the pass.
Looking forward to the FUNcube-2 payload on UKube-1 and the FUNcube-3
payload on QB50p2, apparently both launching June 19th, but I see
conflicting information about the DNEPR launch for QB50p1 and QB50p2
(with a FM transponder from AMSAT-F). Can anyone confirm that date?
73,
Paul, N8HM
On Mon, May 5, 2014 at 12:52 PM, D. Craig Fox <d...@rwglaw.com> wrote:
I was on AO73 last night from southern Cal (DM13) at around 0555z,
calling many CQs. I kept my downlink at about 145.955. My sigs peaked at S9
(no preamp), 5 el fixed at 30 deg.
AO73 was very loud. I had no replies and heard no one but myself. It
does take a little more work to keep up with the Doppler, but this is a
great sat and I encourage you to take advantage when the transponder is
turned on.
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