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 _______________________________________________