Re: [amsat-bb] Transystem Set Up Problems

["Gary \"Joe\" Mayfield" <gary_mayfield@xxxxxxxxxxx>]

With the 2' X 3' dish mount the dipole as far from the dish as the bracket
allows.  I've had great luck with this!

73,
Joe
ka0yos@amsat.org

----- Original Message -----
From: <Aszumski@cs.com>
To: <AMSAT-BB@AMSAT.Org>
Sent: Monday, May 28, 2001 3:41 PM
Subject: [amsat-bb] Transystem Set Up Problems


> Saturday morning I made my first attempt to hear the AO-40 beacon on my
> Transystem converter on the 2 X 3 foot BBQ antenna.  Antenna is mounted on
a
> camera tripod using horizontal polarization and moved via the "armstrong"
> method.  Nothing was heard.
>
> I changed to the 8.8125 xtal and cut the stub.  I believe the converter is
> working since I hooked a diode noisemaker up on 30 Mhz and heard a signal
> through the converter (freq would change as I blew on the Transystem
xtal).
> The frequency was down at 143.6 something and I also heard a signal at
143.7
> something.  Is one of these the image that has been discussed here on the
BB?
>   I was surprised to find the signal so low, seems most people have the
> problem of the freq above 144.0 mhz.
>
> I also am unsure of the mounting of the converter.  The instructions that
> came with the converter discuss mounting it on the closest set of holes,
this
> puts the dipole at about 11.5 inches from the front of the ant.  Using a
> formula to find the focal point of a dish indicates the dipole should be
> almost 14 inches.  Dish is 38 inches in the long dimension and 6.5 inches
> deep.  I tried to hear an increase in noise as I pointed the ant at the
sun,
> but the noise actually decreased so I guess I don't have the focal point
> correct.
>
> On Saturday, I varied the distance of the converter and listened on a freq
> range from 143 to 145 mhz (since I am unsure of where the converter output
> is).  Noise on the FT-736 was around S-5.  During my testing squint was 3
to
> 5 and MA was 185 - 200. Up around 145 I heard a pulse signal that I assume
is
> radar.  What does the 2.4 Ghz wireless computer network sound like?  A
> neighbor has one of these.
>
> Any ideas?  How strong a signal can I expect to hear?  Was my ant pointing
> just too far off?
>
> Thanks,
>
> A. J.
>
> W4NM
>
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