[Elecraft] Modulation interference KPA100

[Don Wilhelm]

Harry,

Try a test - move the K2 4 to 5 feet away from anything that could possibly
contain a transformer and see if the 'modulation' goes away.  If that
eliminates the modulation, you can either rearrange the shack so the
transformer fields are not close to the K2 or you can add the VCOSHLDKT
available from Elecraft.

73,
Don W3FPR

> -----Original Message-----
>
> I just finished the KPA100 without problems.
> With the first test I hear that the sound of the modulation is
> not good, it
> looks like a interference with a 50 Hz sound.
> That is always, with 1 Watt output or 100 Watt output, it make's no
> difference. My powersupply is good.
> I check the alignment specialy the bias, that is good!
> I was listning to the modulation with the KPA100 next to the K2 and
> everything was normal.
> Hear is the problem: With the KPA100 in the K2 the sound is bad!
> What can I do? I check the cables, everything is normal.
>
> Harry PA3CWQ.
>