I have a TR-751 2m allmode mobile and when power is first applied you'll
hear about 1 second of USB "hiss" which fades into squelch. Turning the
squelch control does nothing at that poin, it's all squelched. Strong
signals are heard, so I know the RX is okay. Using a dowloaded copy of the
service manual I tried a few things, and while adjusting VR14 "Tight
Squelch" I accidently also touched the chassis (thus it was grounded).
Squelch went away and hiss was normal. Unfortunetely, the schematic is
blurry so I can't trace (or for that matter, even FIND VR14). I was thinking
it might be a capacitor, which would account for the hiss and quick fade
into squelch, but with the blurry schematic - forget it. So, does anyone
have any idea if it's okay to just permanently ground VR14? I realize I
won't have squelch for FM, but I only bought the rig for 2m SSB.
TIA
Woody