Re: [Amps] High SWR,

[Roger Parsons <ve3zi@yahoo.com>]

I know this has been said before, but just because your SWR meter says there is 
x Watts of power coming back down the line, it doesn't mean that it is being 
dissipated in your transmitter. All it means is that the transmitter sees a 
load other than 50 Ohms (or whatever) - and it may or may not be able to match 
it. If you have a really bad mismatch you can (apparently) have the situation 
that your 100W transmitter is (say) transmitting 1kW and getting 900W back. 
Obviously that can't really happen - the reason that it seems to is that the 
SWR meter is measuring Volt-Amperes (reactive power) rather than Watts (real 
power) - that is that the current and voltage are not in phase - except in the 
special case of a 1:1 SWR.

73 Roger
VE3ZI



      
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