[Elecraft] K3 unstable ssb power

[Jan Erik Holm]

Doesn´t seem to be a fix. My K3 is just about the same.

Jim SM2EKM
--------------
Juha Kasari wrote:
> 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.
>>