Hi, Rik and Group.
On Thu, 19 Sep 2002, Rik Strobbe wrote:
Antenna current = 1.8A
Theory : radiated power = 0.06*1.8^2 = 194mW EMRP (= 583mW EIRP or 355mW ERP)
Reality : about 35mW ERP (based on field strength measurement)
Difference : -10dB !
Reason : antenna surrounded by many trees
-10 dB? Hmmmm... To decrease ERP by 10 dB total curent in trees should be
about 67 per cent of antenna current. May be it is some another reason?
2 or 3 dB is not surprise, but 10 dB....
I wonder why my message on RX3QFM does not go to a Group? Two times I try
to send and there is no echo for a long time... But another MSG go
sucsesfully. I'll try ones more...
73 de RA9MB/Alex
http://www.qsl.net/ra9mb
| 