wrote in message
...
hi guys,
i am restoring an hq180a. been a while since i messed
with tubes,
(abt 20 yrs) am in need of a little direction. i checked
& replaced
bad tubes, verified b+ v. 2 problems, may be related???
on top band,
very poor reception, & when u adj ant. control, u hit a
spot that
causes oscellation or motorboating. prob #2...on top 2
bands, cw sigs
have a raspy note. not t9 at all. it is a high s/n rcvr
6377. kind
of neat, has spinner knobs, noise blanker, & 455 kc if
brought out to
rear apron. i guess previous owner did mod, but it sure
looks
factory....solder connections, etc.
would appreciate any and all guesses.
tnx, pete, k2iqk

Oscillation and tunable hum can be caused by bad
decoupling and by-pass capacitors. If you don't have a
handbook try BAMA for one. You may have to shotgun the caps.


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Richard Knoppow
Los Angeles, CA, USA