[Hammarlund] HQ 140 X sensitivity

[Rodney Bunt]

Leaky caps. Throwing the Standby switch only removes volts from the IF amp, all other voltages are
on. Time and heat and a raised HT because there is no load from part of the circuit (standby
switch thrown) is a way to leaky caps.

Replace the caps before you get too scientific.

PS: My HQ-140 is fine....

Rodney
VK2KTZ

--- Andy Bullington <abullington@comcast.net> wrote:
> After installing a nice 12AU7 (thanks Ralph) in my HQ 140x its sounding great. The sensitivity
> issue I noticed when I first got it seemed much better after I cleaned the variable cap contacts
> and put a little Progold 
> on them...until....I threw the standby switch for a half hour or so while I
> was teaching. When I got back and flipped the switch back to receive,
> I could get no signals, just background noise. I turned the radio completely off and back on and
> signals all over the place. Flipping the 
> send/receive switch kills the sensitivity pretty much every time. It doesn't seem to be in the
> switch itself which feels and sounds solid
> and spraying tuner cleaner in it made zero difference. Any ideas?
> Thanks.                       Andy W1AWB
> 
> 
> 
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