[amsat-bb] Re: Good mobile antennas to use

Bob Bruninga bruninga at usna.edu
Wed Sep 14 18:24:17 PDT 2011

> If you can only work while in motion and driving, 
> well, nevermind, LOL. A 1/4 wave would probably 
> be as best as you can do then, without going to 
> something like one of the quadrifilars...

Remember, the 1/4 wave 19" whip does perfectly fine on the uplink with any 35W mobile.  That is never the problem.  There is a 9 dB link advantage on VHF to boot PLUS the 35 watts!  

The problem is hearing the downlink.  That is why the 19.5" whip is so good.  It acts like a 3/4 wave antenna for the UHF downlink and it has almost 7dBi gain above 30 degrees up to over 70 degrees.  So it beats a quadrifilar easily (only 4 dBi or so overhead).


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