[Elecraft] [KPA500] K3S/KPA500/KAT500 - Adjusting TX Power

Jim Brown jim at audiosystemsgroup.com
Mon Sep 4 12:53:10 EDT 2017


On 9/4/2017 9:43 AM, Bob McGraw K4TAX wrote:
> I rather deal with a bit of SWR.  The loss in the line due to any 
> amount of SWR on the line does not change with the use of a tuner.

There's another important issue that K6XX (engineer at Elecraft) alerted 
me to. The distortion in an output stage increases if it is poorly 
matched to its load. Bob is my neighbor and we're both serious 
contesters. When I moved here, he made sure that I knew that, and that I 
kept my tube amp well tuned. Solid state amps mostly don't have tunable 
output networks, so the antenna tuner must provide that match.

73, Jim K9YC



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