Re: K2 KPA/100 excessive power issue, SSB mode, some bands

Posted by Steve Kavanagh on Aug 28, 2010; 2:21pm
URL: http://elecraft.85.s1.nabble.com/K2-KPA-100-excessive-power-issue-SSB-mode-some-bands-tp5470018p5472818.html

Ken:

The excessive power could also be due to a problem some of us have had where the KPA100 gain is high enough that the ALC circuits do not have enough range to control the power on some bands (typically 80m and/or 40m).  Only SSB is affected, not CW.

See:

http://mailman.qth.net/pipermail/elecraft/2005-December/050672.html

for my symptoms, and

http://mailman.qth.net/pipermail/elecraft/2005-December/050967.html

for a short summary of the cure in my K2.

Try to see what happens on a dummy load...if you still have the problem that would rule out RF feedback. My transmitted signal was quite distorted on SSB...an on air signal quality report might help you determine the source of the problem, too.

73,
Steve VE3SMA


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