[amsat-bb] Re: no go 1.2 on AO-51
ko6th_greg at hotmail.com
Fri Jun 22 00:22:20 PDT 2007
Wow, that should work. I've got the same rig, 60' of hardline and about 7'
of RG-8 at each end. The antenna is a 9-element Quagi from the ARRL Antenna
Handbook, polarized horizontally.
The start of a pass is around 1268.670, climbing up to 1268.730 at the end
of the pass. I generally don't get into the bird until it's around 20
degrees up, partly due to trees. The downlink side I have a 2x8 element
Yagi with a preamp, and find that polarization changes during the pass,
seemingly at random. I generally follow doppler by keying up and tuning
around to find the edges where I get fuzzy, then center it. It just takes a
second or two. I also find that my computer prediction is about 5khz low
(so tune 5 khz higher than it says), but otherwise pretty accurate. Others
have similar offsets in the 2-5 khz range. You don't seem to need the 67 hz
tone (and it sounds a lot better without it!). My rotors and receive rig
(Yaesu 736R) are computer controlled; I have to run the transmit side by
----Original Message Follows----
From: w7lrd at comcast.net
To: amsat-bb at amsat.org
Subject: [amsat-bb] no go 1.2 on AO-51
Date: Thu, 21 Jun 2007 18:24:28 +0000
I'm not sure if I have some "operator trouble" or equipment snafus. Running
an IC1271A 10 watts to a homebrew 40 T helix via 45 feet of 1/2 hardline.
With a questionable connector. Eight feet of LMR400 to the antenna. I can
hear some you you guys, but my up link is a no go. I'm transmitting on
1268.700 +/- 20. Considering doppler what is your uplink freq? I also
might have some questionable construction methods with my antenna. I
suppose if this were easy everyone would be doing it!
73 Bob W7LRD
AMSAT member 28498
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