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## Re: LF: Re: RX3QFM

 To: [email protected] Re: LF: Re: RX3QFM "Alexander S. Yurkov" <[email protected]> Wed, 18 Sep 2002 21:06:20 +0000 (GMT) <[email protected]> [email protected] <[email protected]>
 ```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 ```
 Current Thread Re: LF: Re: RX3QFM, G0MRF Re: LF: Re: RX3QFM, Alexander S. Yurkov <= Re: LF: Re: RX3QFM, Alexander S. Yurkov Message not available Re: LF: Re: RX3QFM, Rik Strobbe Message not available Re: LF: Re: RX3QFM, Rik Strobbe Re: LF: Re: RX3QFM, Alexander S. Yurkov Re: LF: Re: RX3QFM, Giulio Scaroni LF: ZL6QH beacon test 21 September, Vernall LF: Re: ZL6QH beacon test 21 September, John Andrews Re: LF: Re: RX3QFM, K.Versteeg Re: LF: Re: RX3QFM, Alexander S. Yurkov