"Wayne" wrote in message

Brand new ones will be fine. www.tubesandmore.com

Yours should have had 525-volt, since there's more than 450 volts on
them.



You're right. It's the AB763 schematic which specifies 525. Most of
the working voltages are around 450.

There's also some 25/25 in there. I'll probably just change the
20/525's, the 50/50 in the bias circuit and the 25/25's.

Thanks for the hi-voltage warning, but I'm already familiar with
that. I usually just unplug from the wall and do the screwdriver to
chassis welding function. I used to work on microwave ovens and
those trash cans can flat ruin your day alright.

That's why God invented 100 ohm 5 watt resistors - they take the sting out
of the *welding function*.