[Elecraft] Modulation interference KPA100

[David A. Belsley]

Harry:  Let me speculate.  When the KPA100 is "next to" the K2, you  
have it everything on your bench and away from the power supply.  But  
when you have the KPA100 "in the K2", you have returned everything to  
the operating position, which is near the power supply.  Obviously, I  
could be very wrong in my speculation, but it sure sounds to me like  
you're too near a linear power supply or other source of AC magnetic  
field once you try the K2 with the KPA100 in place.  Try moving it  
away from the problem source.

best wishes,

dave belsley, w1euy



On Mar 27, 2006, at 3:14 PM, Harry de Grood wrote:

> Hello,
>
> 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.
>
>
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