daggerlee
500+ Head-Fier
- Joined
- Jan 11, 2004
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Took the amp out of storage where it had been for a couple of years.
Tubes seem to be okay, both glow and voltage is stable.
Right MOSFET channel measures 0 mV no matter what - turn the trimpot all the way clockwise, then 10-20 turns counterclockwise, nothing, although sometimes the mV will fluctuate between 200mV - 1V, but move the trimpot anymore and it goes ack to 0.
Left MOSFET channel is stable and can be adjusted by the trimpot.
I switched the tubes to make sure it wasn't the tubes that was causing the problem.
Any ideas?
Tubes seem to be okay, both glow and voltage is stable.
Right MOSFET channel measures 0 mV no matter what - turn the trimpot all the way clockwise, then 10-20 turns counterclockwise, nothing, although sometimes the mV will fluctuate between 200mV - 1V, but move the trimpot anymore and it goes ack to 0.
Left MOSFET channel is stable and can be adjusted by the trimpot.
I switched the tubes to make sure it wasn't the tubes that was causing the problem.
Any ideas?