Hi Bob,
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 hand.
Keep trying!
Greg KO6TH
----Original Message Follows---- From: [email protected] To: [email protected] Subject: [amsat-bb] no go 1.2 on AO-51 Date: Thu, 21 Jun 2007 18:24:28 +0000
Hello 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 Seattle _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
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