Re: [amsat-bb] AO-40 reception

["Paul Willmott" <pwillmott@xxxxxxxxxxxx>]

For your tests with AO-40, ...

post-perigee reception has almost dried up, ... its still worth listening
for it, and any bad CRCC data is much appreciated, ... but don't expect
solid copy!

pre-perigee MA 235-253 is now the best time to listen! With MA 245-251
getting the best CRCC OK copy.

Cheers and good luck!

Paul, VP9MU

----- Original Message -----
From: "Dr. Jim Akers" <jakers@ECE.MsState.EDU>
To: "Mark L. Hammond" <hammond@surrealnet.net>
Cc: "Jesse Morris" <w4mvb@juno.com>; <amsat-bb@AMSAT.Org>
Sent: Tuesday, March 27, 2001 16:23
Subject: Re: [amsat-bb] AO-40 reception


> Mark,
>
> I did not get up and listen for the down link last night.  I did hear the
> recent pass but not as well as I had hoped for.  I am using the BBQ dish
> with a Drake 2880 to a FT-736 with 144 MHz IF.  I got only about a s-2 max
> reading.  I have a preamp but have not put it on line as I wanted to
> experiment with the Drake by itself.  Here is what I have found so far.  I
> can hear UO-11 from about a 25 deg elevation to 25 deg elevation as it
> passes almost overhead.  It doesn't even move the s-meter.  I cannot hear
> AO-16 even on an almost direct overhead pass...84 deg elevation.  I get
> about an s-2 on AO-40.  So I guess it is time to put the preamp on line
> and see what happens.
>
> That should give you something to experiment with in the long absence of
> AO-40.  I look at these passes as ways to "tweak" my system a bit. I may
> even get it to the point where I can send some telemetry to the AO-16
> command team;-))
>
> Let me know how you fare on some of these signals.
>
> 73...Jim...W5VZF.
>
> Dr. Jim Akers
> Dept. of Electrical
> and Computer Engineering
> Miss. State Univ.
>
>
> On Tue, 27 Mar 2001, Mark L. Hammond wrote:
>
> > Wow, glad to have somebody confirm weak signals last night, Jess!
> >
> > Yesterday, I got the new 3' BBQ dish+TranSystem downconverter, mounted
it
> > on the array, and did a few quick "harmonics tests."  All seemed to be
> > okay, and the quick bench tests suggested an improvement over the Drake
(no
> > surprise).
> >
> > I got up for the pass, and only heard ONE tiny little "grind" out of
AO-40,
> > about MA 7-ish.  I think pointing accuracy was a factor, but was really
> > disappointed since I have clearly heard better signals from the
Drake+Wimo
> > 30 turn helix on previous passes.
> >
> > So, it is reassuring that signals were indeed weak last night.  I was
> > afraid the new downconverter+dish wasn't any better than the Drake+Wimo
> > helix.  Obviously, I need many more passes before I can get much of a
> > hands-on opinion of the two systems.  Too bad it takes so long for good
> > perigee passes---but that's the nature of the bird for now.
> >
> > 73 and keep the signal reports coming in gang!  Misery loves company ;-)
> >
> > Mark N8MH
> >
> >
> >
> > At 09:04 AM 3/27/01 -0500, Jesse Morris wrote:
> > >Good Morning,
> > >
> > >I was able to make it up to listen for AO-40 at 06:28Z this morning.
The
> > >signal at AOS was not quite as strong as it was at LOS on Sunday and
did
> > >not last very long.  By 06:40Z (phase 7) the signal was in the noise.
> > >Based on the lat two receiptions I guess the antenna angle for me is
best
> > >when the satellite is hiding behind the earth!
> > >
> > >73 de Jess - W4MVB
> > >----
> > >Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> > >To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
> >
> >
> >
> > Mark L. Hammond  [N8MH]
> >
> > ----
> > Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> > To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
> >
>
> ----
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