[Elecraft] build # 6952 smoke! yikes

[John Fritze]

Before turning on power the resistance checks were all good.
Everything looked good, didn't see any problems.  The first 2 tests
went without a hitch, so perhaps I was a bit cocky.

I turned on the power to do alignment and test part 3, got a loud
snap, bit of phenolic smell....

Not exactly what I would have liked to happen:-(   Q7 was toast.  I
thought that perhaps I didn't get the insulator on the screw properly
as it's a bit tricky. I also found I had inadvertently forgot to
install Z1.  So I put it in, and I replaced Q7 with one from the
second K2 kit, but no joy.

I basically now have a 12V short to ground:

Q7 collector 24.5 Ohms
Q6 base 118 Ohms- right where it was before
Q7 base 2 Ohms
U 10, 11, 12 are all as before.

Anyone have any thoughts before I just start pulling the surrounding parts?

John
K2QY

OH NO!  The electricicals are escaping!