Hi all, Just something else to try. A 1 wavelength 1 Turn QFH. best gain @ 30 degrees instead of 90 where you do not need it.
Art, KC6UQH ----- Original Message ----- From: "SV1BSX" [email protected] To: [email protected]; "Amsat-BULL" [email protected] Sent: Tuesday, August 29, 2006 7:22 AM Subject: [amsat-bb] Re: FO-29 Minimum antenna system to work.
yes, I had tried to listen the FO-29's downlink with QFH-antennas on several arrangements and I noticed that the QFH is the most reliable omni Satellite-antenna. The downlink signal was superior in comparison with other omni-antennas. (My QFH was based on *excellent* articles of I8CVS & W3KH respectively, with infinity baluns).
The most important point (as usual) it's the length of coaxial between QFH and Receiver. On my experiments onto my roof by using just a few feet of cables, the QFH was pretty good for FO-29 reception. The problem began when connected with my long-long coaxial cable up to my shack, even in case which I used good quality cable. It's obvious that, the QFH with long coaxial needs a preamp, anyhow. But in this case, you need hard work in order to be able to achieve the best result for good reception.
However, even if QFH is the best Satellite omni-antenna, my experiments proved me that for Linear birds, like FO-29, the QFH is worst than any small UHF-Yagi (ie 5-7 El). The superiority of Yagi antenna is obvious especially in weak signals (Q5 upto 1-3 S Unit). On the other hand, for FM-birds the QFH is good enough and that probably has to do with limiter-stages in FM-mode receivers. Just keep in mind.
73, Mak SV1BSX
[email protected] http://www.qsl.net/sv1bsx
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----- Original Message ----- From: "Joe Leikhim" [email protected] To: [email protected] Sent: Tuesday, August 29, 2006 8:38 AM Subject: [amsat-bb] FO-29 Minimum antenna system to work.
Has anyone tried working FO-29 with egg beaters or other omni directional array? I have plenty of power and a good preamp. I have yet to put my yagi's together (after my last move) and wonder if I can cobble together something that will work.
-- Joe Leikhim K4SAT "The RFI-EMI-GUY"©
"Treason doth never prosper: what's the reason? For if it prosper, none dare call it treason."
"Follow The Money" ;-P
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