[Elecraft] [K3] power output

Mike Clarke clarkema at clarkema.org
Sat Jan 21 07:18:24 EST 2012


Hi Mike,

Thanks for the reply.  I've just done some more tests here into a
dummy load. 

Set for 100W output, the K3's meter  shows me exactly that on CW.
On SSB I can get as much as two extra bars above the 100W mark.
If I turn compression off this happens considerably less often,
but the meter will still bounce up there occasionally.

Having perused the manual a bit more, there is a note on the
bottom of page 28 which suggests that voice power and CW power
are not the same; presumably the power the user requests is
considered in 'CW' terms, even in voice modes; in which case
fiddling with CONFIG:TXG VCE should sort things out.

So in summary it seems I led myself astray by imagining that
there is more feedback from the meter to the PA than is, in fact,
the case; hence wondering why the K3 was telling me it was giving
me 120W when I asked for 100.

73,

-- 
Mike, M0PRL


On 18/Jan 10:18, Mike Rodgers wrote:

> My k3/10 puts out slightly more. Sometimes 9 or 9.5 watts equals 10. 
> Since that drives the 100w pa I would expect a greater amount at 100w. 
> I just figured it had to do with compression on ssb. Try it with zero compression. Also advise how much more it's putting out. 
> 
> 73
> Mike R
> 
> Sent from my spy ring
> 
> Amateur/Ham Radio KE5GBC
> HF & Echolink
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