> grounds on the power supply board and also the diodes on
> that board. I
> also blew out the amp with compressed air to be sure there
> was no dust
> causing anything to arc. Tubes do not appear to be gassy
> and the amp will
> put out full power. The amp has Amperex tubes. Any
> ideas?
It's a tube Joe. It can't be anything but a tube, and what
you see is typical of a marginal vacuum in a tube.
Once the tube "pops" it probably getters itself (arcs can
clear the gas) just enough to hang on a while and it will be
OK for a while.
73 Tom
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