I've just started getting on the linear transponders in the last month or so after a 30 year absence from sat work, necessarily with a portable setup, and would be eager to hear experienced opinions on what to do next to improve receive.
I'm running Cheap Yagis on V(3 el) and U(6 el), diplexers, about 10 feet of RG8X, and receiving on an FT817 or 897, usually on FO29 and the XW's, and have up to 25 watts available for the uplink.
Q's are:
1) with those radios and only about 10 feet of feed line, will a preamp help much on 432?
2) If it will, is the 50$ preamp on the AMSAT site a good start? Or? and
3) With relatively short yagis, will it make a noticeable difference going to circular polarization?
WRT to 3, I've pretty much exhausted what I can find the internet, but just don't have a pragmatic sense for what it will do in terms of evening out reception over, say, an FO 29 pass - I read that you nominally lose 3 dbs most all the time but may pick up a lot on the deep fades, but still not sure how that translates to the real world.
Or is the answer that the set up is marginal enough I need to do it all of the above if I want reliable communications above about 5 degrees or so?
Thanks for the bandwidth and any input.
Scott ka9p