[amsat-bb] Re: Re eggbeater performance - mobile

Nate Duehr nate at natetech.com
Sun May 31 14:31:12 PDT 2009

On May 30, 2009, at 6:19 AM, Bob Bruninga wrote:

> Absolutely, For a 19.5" whip in center of roof:
> 1) Has 5 dBi gain above 20 deg on 2m
> 2) Has 7+ dBi gain above 30 deg on 70cm
> 3) Is an omni
> 4) does not sacrifice 3 dB for circular
> 5) Above 25 deg, satellite is 6 to 10 dB closer!
> 6) works the birds solid for the center of high passes
> 7) Simplicity at its best!

As an "aside" to Bob's comments, the higher takeoff angle of a 1/4  
wave on 2m or 70cm is something that astute FM/repeater users in the  
mountainous areas of the country have always known... when you're at  
the bottom of a canyon, and the station/repeater you want to work is a  
couple of canyons over... a 1/4 wave will work because it'll get the  
signal "up and out" of the terrain via bouncing off rock walls, better  
than higher gain antennas.  Everyone should have a basic 1/4 wave  
antenna available for their mobile station, for use in certain  

Nate Duehr
nate at natetech.com

More information about the AMSAT-BB mailing list