K2 #771, the world's most experienced Elecraft, popped D1 and D2 on the
KAT2. I fear that it also took out the two ADC inputs on U1. CALn does not
work after replacing the diodes. The reading is very noisy. There is also
not any power control which could mean something else is also fried.
Happened to me. Had to buy new output transistors. They included several
other parts I needed to replace. There was talk about providing matched
output devices and I was to get a set. But it never happened. Anyway was only
about $15.00+ fix.. 72 Geo/w2bpi
Steve,
You should be able to balance the wattmeter bridge even if the ADC
inputs to U1 are damaged open - if they are damaged in a shorted
condition, yes they would interfere with the balance adjustment.
I suggest that you try rotating the pots to the full CCW position and
then attempt to
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