Hi, Group.
On Wed, 18 Sep 2002 [email protected] wrote:
Just a thought, but isn't an antenna current of 2.75A a bit low for 0.5W ERP?
I recall running 8 Amps to a 300 foot wire with the top at 150 feet high and
Jim measured it at 0.5W ERP. Or does Vlad have something really high up?
Vlad has Heff ABT 15 m (horizontal part of antenna is 150 m). So radiation
resistanse is:
Rrad = 1600*(Heff/lambda)^2=0.073 Ohm
P = I^2*Rrad= 0.56 Watts.
I do not know why your PWR is not high as follow:
Rrad = 1600*(45/2200)^2 = 0.67 Ohm
P = 8*8*0.67 = 43 Watts
If only one end of wire has H=45m then Heff=22.5 m and P=11 Watts
73 de RA9MB/Alex
http://www.qsl.net/ra9mb
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