I recently completed the assembly of a K1 Sn#2905.  I really cannot tell if the 
thing works as there is an irregular but frequent and rather intense popping 
that is cannot determine the cause.

This occurs with just the rf  board and front panel installed.

The panel keys appear to function and all else seems to function.

I have check and recheck part placement and every solder connection.

I also have the uncomfortable 60 cycle hum that I can control by shifting the 
K1 around into different positions.  I use the power supply for a K3 without 
any problem.

Any suggestions?

Thanks,

Charlie White
K6TBB
San Diego
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