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Re: AO-40 Reception


Unfortunately I went to the AMSAT D.C. meeting and had to leave just when
things were heating up. Don, W4VQA has the same setup I do but didn't hear
anything either. We'll try joining your next session.

By the way, thanks for going out of your way to help us "rookies". I'm
finding there are just a lot of loose ends to tie up if one is to be
successful. Being a coach to help us over the bumps is a wonderful thing to

Art N3OY

----- Original Message -----
From: Alan K. Adamson <ne1h@highrf.com>
To: Art Goldman <artg@home.com>
Cc: <amsat-bb@AMSAT.Org>
Sent: Monday, April 02, 2001 5:30 PM
Subject: RE: [amsat-bb] AO-40 Reception

> Art,
> Were you able to join us yesterday for the net session that I hosted?
> I had the audio from my RX on the net as live mp3 and I served live
> telemetry via the Goddard server.
> I've been doing this from time to time to give those that are trying to
> checkout their systems a chance to do that.
> I've copied the list on this note as well.  It seems a few people have
> this same question.
> My equipment on this end is
> ts-2000 or ft-847 rx (I used the 2000 yesterday as I wanted to play with
> "transvert" option)
> SSB UEK3000SAT Downconverter (.7nf, 30db gain, 432 IF in my case)
> Directivesystems.com 52 element loop yagi setup as horizontally polarized.
> 21dbi on an 8' boom
> Yesterday, I was able to hear it out at 42K km at MA200.  I could hear it
> off and on from then until AOS which was MA253.  I won't say I could copy
> conversation off of it as the spin mod was pretty bad and the off pointing
> was pretty bad.  At the times when I could hear it out that far, it was
> At about MA240, it was up to s2-s3 and it peaked at S9+  It was very loud
> and the Smeter in the new kenwoods are pretty unforgiving as I've found.
> All total, I got 147 packets of telemetry with 30 of them being valid.  I
> was in flipped mode on my rotators and I had to swing around at one time
> I have some offset in my antennas that I've never corrected and I ran out
> room on that side of the turn :(...
> Oh, well, I'll see about putting together another net session soon.
> Hope this helps?
> Alan
> -----Original Message-----
> From: Art Goldman [mailto:artg@home.com]
> Sent: Monday, April 02, 2001 5:08 PM
> To: Alan K. Adamson
> Cc: Don Rees
> Subject: Re: [amsat-bb] AO-40 Reception
> Alan:
> Don, W4VQA and myself were wondering what your setup was like. You got
> fantastic results while we barely were able to see some small squiggles on
> the waterfall. We know there is something there, but the S-meter isn't
> moving.
> We have BBQ grill antennas (+24dBi), DEM converter (+20 dB), and receivers
> in the .2 uv sensitivity range. All things being equal, we should be doing
> better.......
> Tks,
> Art, N3OY
> ----- Original Message -----
> From: Alan K. Adamson <ne1h@highrf.com>
> To: Jesse Morris <w4mvb@juno.com>
> Cc: <amsat-bb@AMSAT.Org>
> Sent: Sunday, April 01, 2001 8:12 PM
> Subject: RE: [amsat-bb] AO-40 Reception
> > Jess, AO-40 was just fine today.  I listened from MA230 - MA253.  Got
> or
> > so telem packets and 30 or so that were good.
> >
> > I was listening to it out at 42K KM at MA230.
> >
> > Doppler and setup today were just fine, it didn't get very loud until
> MA250,
> > then is was S9 at least with a few S9+
> >
> > Just thought I'd let you know.  I hosted live audio from it and live
> > telemetry via p3t and the goddard server.
> >
> > Alan
> >
> > -----Original Message-----
> > From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org]On
> > Behalf Of Jesse Morris
> > Sent: Sunday, April 01, 2001 6:27 PM
> > To: amsat-bb@AMSAT.Org
> > Subject: [amsat-bb] AO-40 Reception
> >
> >
> > Good Evening to all,
> >
> > I heard zip out of AO-40 today and I'm not sure why.  I don't think it
> > was my receive setup because I heard both UO-11 and AO-16 this weekend
> > for the first time and the AO-16 reception was just a couple of hours
> > before I tried AO-40.  Maybe I got a bad set of keps but the pass seemed
> > reasonable - I listened from 1715Z (MA240) until the IT predicted LOS of
> > 1814Z (MA253) but I did not hear a peep.
> >
> > Incidentally, since I put the Drake converter on the mast I have been
> > getting some of the impulse type noise that has previously been
> > here.  I first thought it was interference but I now believe it is
> > internally generated.  In my case however, I am using a grounded feed
> > helix and I have a SM inductor across the input connector of the
> > converter. The noise is not continuous but seems to come and go.  It
> > appears to be somewhat related to the elevation drive but I can't
> > it with movement.  It sounds like static type impulse noise but the
> > blanker does nothing to it so it must have a wide pulse width.  Sounds
> > somewhat like rain static but the weather has been clear when I have
> > heard it.  I'm thinking in terms of running a ground wire from the
> > antenna/converter to the rotor and mast and see what that does.  I'll
> > keep you posted.
> >
> > Hope lots of people heard the signal and I just made some sort of stupid
> > mistake.  Windows 95 (bless it's heart) did adjust the GMT time on my
> > computer for daylight savings but I got that fixed before the pass.
> >
> > I have not completely mastered the IT ALON/ALAT concept.  I assume that
> > since ALAT is currently zero there isn't any reason to change the sign
> > zero!  I added 180 to 170 and used 0/350 as the input for IT.  Of course
> > that wont make any difference in actually hearing the satellite.
> >
> >
> > 73 de Jess - W4MVB
> > ----
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> >
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