[obcbeatle]

Well...after I sprayed (Deoxit) on all the switch and pot. contacts the
402 worked great for a couple days. But today I turned it on and there
was a fairly loud hiss coming from the left channel and the left
channel is weak (low volume) again. I can gently bump the 402 and the
left channel volume increases, but it is still not equal to the right
channel in volume (but close). I can spray the Tone Defeat and Low
Filter switches again (these seemed to be the offending swithes at the
time), as well as ALL the switch/pots, but I have already done that a
couple times. I don't want to over wash. I suspect I have a failing
component, but I don't feel like it's the Tone Defeat and/or Low Filter
switch anymore since there is hiss in the left channel when I turn the
402 on after it has been off for awhile. I can turn the 402 off and
then immediately back on with no hiss. Does anyone have any ideas? Or
does anyone have a schematic for this amp and a suggesttion where I
might probe first to find an offending component? Also, I have a
multi-meter to test components. I just don't know where to start. Or
if anyone has any other suggestions for me, I'd appreciate a reply. I
work on computers for a living and have repaired my guitar pedals and
tube amps in the past, so I'm familiar with safe practices when dealing
with electricity... Otherwise, I guess I'll try to get this 402
repaired by someone else, or buy a new amp Thanks.