did i kill my pt?

[scole]

i think i might need a new pt for my pr build. i was planning to use the 50v bias tap availible on my allen pt, so i put a 470 ohm bias resistor in but at the last second i wired the bias supply from the rectifier. when i fired up the amp i got crazy ma reading something like 10k or 100 ma, i shut it down, looked inside and saw what i did so i changed the bias resistor to the correct value(100k) and the amp worked great, for a while, then the rev and trem stopped working. then i noticed if i turn the amp off then on the rev and trem worked for a minute, then went off. i checked inside and found the rev driver tube voltage was very low so i put in a new tube and all was good , anyway the amp worked fine for a while then it started humming. i turn the amp off then on again and it works for a minute the hums again, it did this for 30 minutes or so and finally went strait to full blown hum, loud like touching the speaker wires together. anyway i think firing the amp up with the small bias resister killed the tranny. but im not sure.

[tubeswell]

Hi Scott - Did you try a third tube? (the 2nd one could've been a dud)

[scole]

yes i did try a few tubes. i wonder if it could be a bad tube socket. i used the mojo fake beltons.

[loudthud]

You should check the caps in your bias supply. They probably got hit with some serious voltage when the 470 was in there. Other than that, I don't think anything you did would cause the PT to fail.

[scole]

man thats good news. im going to look into that in the am, thank you loudthud

[scole]

no good. the cap and diode are ok, what next?

[tubeswell]

Have you got a B+ voltage, and what are your voltages at the filter cap nodes?