[Elecraft] SWR and Power Output

[W2xj]

I think that this was covered. You don’t run a solid state unit into a mismatch. The antenna tuner in effect takes the place of the output network that existed with tube rigs. 

Sent from my iPhone

> On Apr 10, 2019, at 11:39, Eugene <earobinson at sbcglobal.net> wrote:
> 
> The reason SWR should be of concern is the effect it has on what is presented to the solid state output device(s) in your radio. 
> The output power and final stage current is determined by the load presented by the antenna/tuner and the output matching network. 
> The output power is, P= supply voltage squared divided by 2xR(load). A 2:1 SWR could present a load either half or twice the design load for the 1:1 (50 ohm) SWR match or some where in between those two points with a complex impedance being presented to the output device(s).
> Thus, the output power delivered by your radio and the final output device current and efficiency  is directly related to the "match" presented to your radio by your antenna and/or tuner.
> 
> Gene, N5LDX
> 
> Sent from my iPad
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