[amsat-bb] Lindenblad or DCA???

[skristof at etczone.com]

Bob, when you say "big ground plane", how big is "big"? If you have a
link to the appropriate webpage on your APRS site, that would be great. 

Thanks! 

Steve AI9IN 

On 2018-04-02 13:02, Robert Bruninga wrote:

> Great plots... Now add a 1/4 wave monopole plot.  It has a null straight
> up, but the time any satellite is in that null is less than 5% of the
> time, and at those higher elevations, the satellite is 10 dB stronger
> anyway.  So the impact is minimal...   And it has a smooth response
> without all those nulls of the others...    And include a 3/4 wave
> vertical plot and pick up another 2 dBi... above 30 deg.
> 
> -----Original Message-----
> From:  Roland Zurmely via AMSAT-BB
> Sent: Monday, April 02, 2018 12:28 PM
> Subject: [amsat-bb] Lindenblad or DCA???
> 
> See here comparison of 4 omnidirectional antennas: DCA, Lindenblad,
> turnstile and QFH:
> <http://www.qsl.net/py4zbz/4ant.htm>
> 73 de Roland PY4ZBX
> _______________________________________________