[Elecraft] KXPA100 RF feedback

[Don Wilhelm]

Erik,

Apparently something *did* change in your antenna system.  It may not be 
in the shack.

Look for something that arcs over at higher power or a loose connector 
or a balun that has failed.

73,
Don W3FPR

On 1/22/2017 11:36 AM, E T wrote:
> Today my KXPA100 stopped working properly.  Whenever I transmit I start getting feedback, a sort of electric stuttering effect.  When the amp is bypassed this does not occur.  Also, if I transmit into a dummy load the problem does not occur, indicating that somehow the antenna RF must be affecting the amp in some way?
>
> Nothing has changed in my shack since yesterday, and the problem occurs with both my KX3 and KX2, so it's not the radio.  Everything is fully grounded to a copper bus bar on my desk.  I performed the factory reset through the KXPA Utility with no change.
>
> Has anyone had this happen?
>
>
>   Thanks and 73,
>   Erik Tkal  -  W1QED
>
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