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R: AO-40 Squint Angle - reply -



Hi Nick K5QXJ,

I aegree with you on g/t parameter as a figure of merit of a receiving
system.

Using the sun and solar flux data (sfu) my measured g/t  is 7.14 dB
at 2400 MHz

I have sent to you and to Gunther a copy ASAP of the program NOISE.EXE
and a set of solar flux data at 10.7 cm (2800 MHz) daily released by
NRC/DRAO wich i use about every week to performe sun noise measurements
and the above g/t calibration of my system to check if everyting is properly
functioning independently of any AO40 squint angle or any other satellite
condition.

If any other fellow in the BB is interested on it,drop me a line please and
i will send the above ASAP as well.

73" de

i8CVS Domenico

----- Original Message ----
From: nick pugh <quadpugh@bellsouth.net>
To: Gunther Meisse <gmouse@neo.rr.com>; <amsat-bb@AMSAT.Org>
Sent: Monday, June 09, 2003 11:58 AM
Subject: Re: [amsat-bb] AO-40 Squint Angle - reply -


> Using the sun as a reference solves a lot of problems and is well document
> in the ham lit. We should be focused on the g/t as a figure of merit and
we
> should exchange our g/t in our qso. Antenna size or gain only tells part
of
> the story.
> nick k5qxj
>
>
>
> Gunther said
> > Jeff,
> > I think you hit it right on the head. Squint gets worse and as the MA
> > increases up to 128 the distance keeps increasing..
> > Something I do is use the sun as a signal source. It does not have a
> > squint problem and is very consistent, except for large storms. In a
> > given tuning session, it works pretty well. I am going to install a dual
> > band patch next week on my 7.5' dish and I will take sun noise readings
> > first using my James Miller patch and then make the switch and hope the
> > new W0LMD patch is as hot..
> > 73
> > Gunther
> > W8GSM
> >
> >
> >Jeff said
> > This weekend, I decided to try to optimize my helix feed using the AO-40
> > beacon as a signal source. I noticed that AO-40 signal got considerably
> > weaker after the pass band shut down as the MA moved from 130 to about
> > 200 to a point where I can barely make out the beacon. At first, I
> > thought it was my optimization process but when I put the helix back to
> > its original configuration, I noticed the signal was still way down.
> >
>
>
> ----
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