I'm trying to bring this dinosaur back to life.
It's an Ampex amplifier for driving AC motors. 300/350 Transport.
It's capable of putting out up to 130V but now its 21v :'(
I've replaced all el.caps and checked resistors and filmcaps
everything seems fine and the DC voltages looks like the ones on the schematic
so I suspect the output tubes but before I start ordering these rare beasts
do the signal voltages looks normal until the output(the red ones)?
It's an Ampex amplifier for driving AC motors. 300/350 Transport.
It's capable of putting out up to 130V but now its 21v :'(
I've replaced all el.caps and checked resistors and filmcaps
everything seems fine and the DC voltages looks like the ones on the schematic
so I suspect the output tubes but before I start ordering these rare beasts
do the signal voltages looks normal until the output(the red ones)?