View Single Post
  #6   Report Post  
Old January 16th 07, 11:14 PM posted to rec.radio.amateur.antenna
André André is offline
external usenet poster
 
First recorded activity by RadioBanter: Jan 2007
Posts: 11
Default GPA vs Vert dipole


"Cecil Moore" a écrit dans le message de news:
qW5rh.32215

EZNEC agrees closely with your previous values.
--
73, Cecil http://www.w5dxp.com



OK Cecil, thank you for the test.

The question now, is, why a GPA in free space does not present a 36 Ohms
impédance ?


I use a full sized GPA on 40m, 6 meter high and a quasi 1/1 SWR with 50 Ohms
coax line;
with 36 Ohms in free space I had 14 Ohms for losses in the ground and 36
Ohms for my correspondant;
but now, it is 28 Ohms for the ground and 22 for the QSO...


To night, I can not open your page www.qsl.net/w5dxp/dipvsver.htm

I was interested to see if you get the same results,
I use also a half wave dipole 16m high and the GPA, with a slight advantage
for the GPA during the night and distant stations, and the opposite during
the day time and short distances;
the ground is very poor here.


73

André
http://f5ad.free.fr/