[Elecraft] K3 speaker amp chip bites the dust again

[Dave Hachadorian]

I guess I've blown the speaker amp IC in my K3 again.  This is 
the third time this has happened, twice in one radio and once in 
another.

In this case, the radio had both the AF Output Mod Kit (pair of 
470 ohm resistors) and the E85056 Audio Protection Assembly 
Circuit Board installed.

I was operating on Field Day, with headphones, as I usually do, 
when some onlookers wanted to hear what was going on.  I flipped 
SPKRS+PHONES=YES, then along came a strong signal, and poof! no 
speaker audio.

AGC SLP was zero, and AGC THR was 020.  Front panel AGC was FAST.

This failure is really getting old, especially at $120 a pop to 
get it fixed.

Dave Hachadorian, K6LL
Big Bear Lake, CA














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