If there is a relay in the rx signal path, check the contacts. I had that 
happen with my Alpha recently. Of all the possibilities that was the easiest 
thing to fix. Thankfully that was the problem :-). 
73,
Bill WE5P

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On Feb 10, 2020, 17:52, at 17:52, [email protected] wrote:
>I am looking for thoughts and suggestions to diagnosis what I am
>seeing.
>When the amp is changed from STBY to OPER the receive signal drops by
>multiple db and the general background seems to increase significantly.
>The
>tuner seems to work the same with or without the amp. When I transmit
>it
>appears I am getting full power output. I am driving the KPA-500 with a
>K3.
>
> 
>
>Thanks in advance
>
> 
>
>Allan
>
>WA7BKD
>
> 
>
> 
>
> 
>
> 
>
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