Thanks Clayton!
Now if I could find a small commercial az-el rotator for an Arrow, that would be ideal!
Lee
Clayton Coleman W5PFG wrote:
Lee,
I have yet to find a better solution for FO-29, SO-50, and AO-27 mobile than a combination of small UHF yagi with preamp for the downlink and a VHF vertical for the uplink. While the quadrifilar helix, eggbeaters, and 19" whip all work, nothing gives me a 100% copy of all the LEO's from AOS to LOS like the yagi/preamp combination.
I've tested the above mentioned fixed antennas for downlink across a variety of Texas terrain and surrounding noise environments. They all work, some better than others, but are no where near the performance level of a directional antenna. Since I'm a firm believer that hearing the bird is #1, I do not compromise with a vertical. It's safer for me to pull my vehicle over to a parking lot or rest area to work passes. I have done a few passes "in motion" with both the quad and the 19" whip and quite frankly terrain/obstructions play such a huge role I hardly recommend even attempting to do it unless you are on a flat, high plain.
73 Clayton W5PFG
On Thu, May 24, 2012 at 3:02 AM, Lee Maisel <maisel@lobo.net mailto:maisel@lobo.net> wrote:
Any ideas on a good antenna combo for mounting on a large vehicle? Possibly roofrack, specifically for satellite work? Thanks! Lee W5LMM _______________________________________________ Sent via AMSAT-BB@amsat.org <mailto:AMSAT-BB@amsat.org>. 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