glasman wrote:The only time I have seen balancing resistor open up is where one of the output tubes decided to take a dump and short out. Usually takes the balancing resistors and sometimes the screen resistors.
Gary
Gary
Yeah same here..I've never seen a blowout on the balancing resistors due to
preamp filament lift .... Something else has happend.
Tony
" The psychics on my bench is the same as Dumble'"
I had my heater artificial center tap resistors on my amp fail when I had a short in the relay power supply. (a piece of metal lodged between the relay board and the chassis)
Fried them big time.
New 12v transformer and two new 100R resistors and I was back in the game.
Thanks Dave, it helped. I'm lucky that it all works again.
Gary, I did get a tiny spark ( o, this sounds dumb ) when using my multimeter and pulling away the probes. It was really small, but I think that killed the resistors. I'm very happy that the PT is OK. That would have been crap time and moneywise, and would have to wait to show off this amp to my friends. The loose solder connection on the PI is a lesson to check stuff even more next time. I swapped a lot of tubes and used brandnew quality sockets, so the sockets have moved a lot since assembly. With my next build, I will try to make the same problem impossible to happen.
Chip, I will try that. Would be cool if that works.
Something else has happend.
