RE: [amsat-bb] ao-40

["Gunther Meisse" <gjmouse@xxxxxxxxxx>]

Don,

I have virtually the same setup. I get s5 for noise floor on my Icom 910H.
Beacon is s9 with the QSOs down ten db as is expected. That puts them at s6.
Not much margin, I conclude that the Airlink 60cm dish does not cut it. It
is linear polarization for starters.I have not had the guts to try to open
the AirLink radom. It is bonded to the dish. The solution: First go to RHCP
which is +3db, I am going to the new Patch feed which can muster about an
additional db.  I am going to switch to a 1.2 meter Channel Master Offset
dish with this Patch Feed. The result should be about + 10db. This should do
the trick.
Next problem? Pointing the dish. I am looking at a way to mount the dish on
the 5500 rotor system, just over the motors so I do not present a weighted
leverage problem to the system. The overall weight is not an issue. The
final question will be if the 5500 will be accurate enough due to the couple
of db 1/2 power beam width. We'll see.
73
Gunther Meisse
W8GSM


-----Original Message-----
From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org]On
Behalf Of Don Blachura
Sent: Saturday, August 04, 2001 10:41 AM
To: amsat-bb
Subject: [amsat-bb] ao-40


Hello, I am using an Airlink 24" dish and a uek-3000 downconverter. Can work
the bird when its in my window. but only in cw. The signals for ssb are in
the noise. I have the dish on my boom and use 70cm for the uplink.  The
noise on the downconverter is about a s-3 so when I hear the ssb  qso's Its
low and in the noise. Downconverter is mounted rite at the dish so the lead
is short. Using 9913 coax. Can anyone suggest improvements?

Thanks
 Don...w2xb

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