Dave xxxx wrote:
one or more output valves start glowing on and off like buggery,
loudspeakers drivers being thrown fully out and back again, loud pops.
this is happening with or without music playing



ta in advance


Dave

Much more information is needed:

Type of amp?
*ALL* Tubes involved?
Age of amp?
How long have you had it?
How long has this been happening?
How much do you know about tube-based electronics?
What, if anything has been done to it by you or to your knowledge?

and so forth...

NOTE: Do not screw around inside the amp unless you know what you are
doing. Lethal voltages are present.

Peter Wieck
Wyncote, PA