[Elecraft] Re: K3 SSB power setting

[wayne burdick]

Dr. Werner Furlan wrote:

> when I transmit in SSB I am not able to get 100 % HF output.
> peak power is around 40 Watts whatever I do, reading on the LP-100 peak
> power meter. (using a Heil Proset with HC 5 Element)
> RF display is about 40 % max.
>
> But! when I key the transceiver with the CW paddle in SSB (new feature,
> very welcome!)  I suddenly get full output also with normal speech.
>
> If I twist the power a little up or down, I am back on 40 % output, 
> with one Dit
> in CW I can have the full power back.
>
> I am curious, if I am the only one with this problem.
> btw, modulation reports on the air are excellent. Loud and clear, vy 
> good
> readability.

Hi Werner,

Have you tried doing power calibration on all bands as described in the 
manual? You need to do TUNE on each band, into a dummy load, at both 5 
W and 50 W. This should get you reasonably close at 100 W.

However, for best initial power-setting accuracy in SSB modes and in 
DATA A and AFSK A, I'd recommend doing a quick TUNE. This is more 
accurate than setting the POWER control, which at present uses a lookup 
table to determine the approximate drive value required.

You can also use a non-zero value of CONFIG:TXG VCE to adjust the 
nominal drive level in voice modes vs. CW mode. You might try setting 
this to +1.0 or so.

73,
Wayne
N6KR


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