[TowerTalk] ++ High SWR and Modern Transceivers

[Tom Rauch]

> Tom. You are promulgating wrong ideas and concepts which will repeated
> by the neophyte. 

I hope they do grasp the correct concept, then all the folklore about 
SWR and what makes transmitters and tuners hot will cool off.

The only thing SWR does for certain, at least in the systems we 
are using, is cause the load impedance to change. The rest all 
depends on how the impedance changes.

Pete, with his modern transceiver, can't get an accurate short 
answer except one that says, "Well Pete, something probably 
changed. We just don't know what".

Claiming tuners get hotter when feeding loads with high SWR, and 
stating tuners handle more power with a low SWR load, is much 
more likely wrong than right!  

Even in a transmission line, if the line is short in terms of 
wavelength and the impedance moves in the right direction, 
additional SWR can actually ***decrease*** line loss. That's 
because loss is not evenly distributed between voltage and current 
based losses, just as in a radio and a tuner.


73, Tom W8JI
W8JI@contesting.com 

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