"Ray D. O'Mann" wrote in message
om...

Hi All!
Thanks a bunch for the tips, tricks, and advice. It is VERY
appreciated. Everything always tests OK out of circuit and I've been a
bit reluctant to do the in-circuit testing since all I have is a DMM.
The shop where I was testing my tubes now charges a fee for using
their tester. With everything that you all have posted for me, I
believe I can get it to work right. I hope. To answer some of your
questions, it just quits. I test the tubes, then I check the caps,
diodes, connections, etc., plug it back in and it works for a day or
two and then quits. Any thoughts?~~Ray


I'll suggest you start looking for bad solder joints, especially if it's
on a circuit board. The hot/cold cycling can put cracks in the solder
joints, which can open up when the radio warms up. Ususally you can see
the cracks if you are looking right at them. Or maybe not. You might
try touching up all the solder pads if you end up frustrated and have
some free time.

If you can do it safely, try tapping around with the eraser end of a
pencil while the radio is working or after it's just shut down.

Here's a link to a scanned copy of the owner's manual:

http://bama.sbc.edu/knight.htm

These files are kept on a server at a small college, and it's often too
busy to access the files during the day. They are usually available
late at night.

Frank Dresser