[amsat-bb] Re: Antenna suggestions for mounting on vehicle for sat work.

[k4rjj at comcast.net]

The company that comes out with an AZ/EL unit that is about $200 is going to sell a million. 

----- Original Message -----
From: "Lee Maisel" <maisel at lobo.net> 
To: "amsat-bb" <amsat-bb at amsat.org> 
Sent: Thursday, May 24, 2012 1:02:39 PM 
Subject: [amsat-bb] Re: Antenna suggestions for mounting on vehicle for sat work. 

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 at lobo.net 
> <mailto:maisel at 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 
> 
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