It's probably one of the three electrolytics in the can. Two are
the power supply filters, and the small value goes to the 6AQ5 audio
amp. I got a literal smoke test when I tested my HQ-145 and I saw the
smoke coming from the rectifier. I just recapped those three and the
receiver works fine now. The values in the can are not standard values
today, so I used a 47 and 60 mircro farad, 450 volt. I was able to get
the same value for the 50 volt audio electrolytic. Recapping was a one
week project to order and receive the caps and about 30 minutes to
install them. I also got a four or five post terminal soldering
strip, one of them grounded to place the caps. An ambitious person
could try to stuff the caps into the metal can in a rebuild, but that
is a bit too much authenticity for me. These 45 year old caps do dry
out. It might be possible to reform them with a Variac brought up
slowly, but I've never tried it. This is not a '64 Mustang
convertable or an ancient Corvette. My view is that even when new,
non-orignal parts were substituted in any routine repair.

Just remember to replace any jumpers on the relay outlet on the back
panel. The radio doesn't work without it. You either need the jumper
or a contact on a relay as I discovered in a very frustrating trouble
shooting session. Duh!

Jon W3JT


On Thu, 05 Jun 2008 16:07:39 GMT, "Count Floyd"
wrote:

I just received the radio, brought up the power, played well for about
five minutes, then the hum started, a noise like sizzling bacon, a
faint burning odor, then I shut off power immediately. Is it the
electrolytic capacitors, the rectifier, both? Any suggestions would
help.
Thanks,
Bob Grimes