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RE: AO-40 Squint Angle - reply -



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


-----Original Message-----
From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org] On
Behalf Of K7XQ
Sent: Sunday, June 08, 2003 8:07 PM
To: amsat-bb@AMSAT.Org
Subject: [amsat-bb] AO-40 Squint Angle



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.
 
Is this because the squint angle gets considerable larger after 130 MA
looking farther away from earth ???


K7XQ   Jeff   Atwater, CA.
Grid: CM97qi
EME, Satellites, Meteor Scatter
JT-44, FSK441 ( WSJT ) , CW

144 MHz: 4 X 3 W.L. 800 Watts single 3CX800A7
Initials: 61

432 MHz: 2 X 9 W.L. 800 Watts 2 X 4CX400A7
Initials: 5

1296 MHz: 3.1 M Dish 150 Watts 2 X 2C39 water-cooled
Minimum dish elevation of 20 degrees :<
Initials: 22

K7XQ Homepage: http://www.elite.net/~k7xq/k7xq.html

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