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[CQ-Contest] Accounting For Feedline Loss - Legal?

Subject: [CQ-Contest] Accounting For Feedline Loss - Legal?
From: k0hb@arrl.org (Hans - K0HB)
Date: Mon Jan 31 09:38:25 2000
Nat Heatwole wrote:
> 
> Hello. Let's take the following situation:
> 
> -Contester X owns an Alpha 91B amp that will produce 2500w output on CW.
> -Contester X's feed line to his antenna is 250' long.
> -Contester X knows that he is losing 25% of his power in his feed line.
> 
> So, would it be legal for Contester X (under current FCC rules for the
> amateur service) to do the following:
> 
> -Run his Alpha 91B at 2000w on CW to account for the feed line loss.
> Allowing the input to his antenna to be 1500w, and 500w to be consumed by
> his feed line.

Your non-existant friend would be violating the rules.  The 1500W
PEP is measured at the transmitter, not at the far end of the feed
line.  The language is quite clear.

   "§97.313 Transmitter power standards. 

    (a) An amateur station must use the minimum transmitter power necessary 
        to carry out the desired communications. 

    (b) No station may transmit with a transmitter power exceeding 1.5 kW
PEP."


73, Hans, K0HB


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