Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: TerryD on September 22, 2014, 08:32:39 pm
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The amp had been running pretty good for a little while. Then I was getting some intermittent (major) distortion and intermittent loss of volume to almost nothing. I messed with some 12ax7s with my hand and it seems like that is the trouble.
I tightened up all the tube sockets. Got some DeOxit Dp5 and used a china tube to clean out the sockets. It sounded tight and strong for a couple of days. Now the intermittent distortion and loss of volume is back. If I jerk around with the phase inverter tube and the one next to it and push them in it plays good for a while. When I had the chassis out everything looked connected.
Any ideas how to resolve this problem??
I usually don't keep the 12ax7 metal tube holders on, as I think they make the sound a little metally.
Thanks, Terry