[Elecraft] K3 unstable ssb power

[Juha Kasari]

Thanks,

Ok, so it is feature!

Yes I have adjust MIC and CMP just like manual, not effect. So there is no
solution to problem.

juha


2010/3/28 Dave, G4AON <elecraft at astromag.co.uk>

> Juha this "problem" is an old one. Some time back the K3 had poor ALC which
> allowed for overshoot on peaks, the firmware was altered to soften the ALC
> control with the results you (and the rest of us) experience. The power can
> slowly increase over the first few seconds on SSB, the effect is less if you
> "TUNE" first via the front panel button. Also, have you checked that you are
> driving the ALC meter reasonably well, as per the manual?
>
> For comparison, my TS-480SAT is also quite soft on ALC control with the
> peak power seeming to vary from one moment to the next. With some previous
> radios I recall seeing the peaks on an oscilloscope looking like a trimmed
> hedge, which is liable to create excessive IMD.
>
> I use an LP-100 peak reading power meter and the K3 is similar in it's
> peaks compared to my TS-480 with the same linear (Acom 1000). I don't think
> it's anything to worry about.
>
> 73 Dave, G4AON
> K3/100 #80 f/w 3.79
> -----------------------------
>
>
> I have K3 #2100. On CW power is very stable, but not on SSB. There is some
> change on output power, it is not constant.
>
>