[Elecraft] KPA100 and Audio Issue

[Don Wilhelm]

Rich,

Connect an external wattmeter and a dummy load.
Then set the K2 power to 50 watts and do a TUNE.
What is the actual power output?  If it is much greater than 100 watts 
(as I suspect), then you do not have power control and that says that 
the wattmeter in the KPA100 has been damaged - likely from static coming 
in on the feedline.
Replace D16 and D17 in the KPA100 and the problem should go away.

73,
Don W3FPR

On 4/6/2020 11:36 AM, Rich wrote:
> I am having an issue with distorted audio once the KPA100 kicks in at 
> about 10-12v.
> 
> The KPA100 is putting out 100 watts
> 
> I have re-calibrated the radio with no change.
> 
> I am testing with the hand mic and a dummy load.   Which should 
> eliminate any external devices causing it
> 
> Any suggestions as to what can be causing this issue?
>