crosley Model 10-135

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crosley Model 10-135

Post by addase on Tue Mar 12, 2013 5:40 pm

Hi, I have a Crosley model 10-135 and I am having issues with the voltages on the heater string. Issue is at the Audio output tube 50C5 where pin 4 the voltage is correct at around 80v but drops to 7.7v at pin 3 instead of 36v. This is then connected to 12BA6 tube where the heater pins 4 and 3 go from 7.7v to 0v and then the rest of the heater string values for the other remaining tubes shows a reading of 0v.
I checked continuity of the wiring between the heater pins of all sockets and they are great. All tubes test good. Not sure what else it could be as to why 50C5 tube uses up 70v at the heater pins when it should be using only 50v. This in turn results in both the 12BE6(converter) and the 12AV6(Det & 1st Audio amp) tube to have no voltage on the heater pins. I am stumped.

addase
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Re: crosley Model 10-135

Post by Bill Cahill on Tue Mar 12, 2013 6:07 pm

I'm locking this thread because there are already replies to it in the other section, and, two posts are not needed.
Bill Cahill

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