Kennyg2209
Well-Known Member
I recently finished my test circuit for my first 2A3 tube amp build. All my voltages where close but the output tube B+ were a little different. I checked the temperature on all my resistors and the cathode bias resistor on the one output tube was hot. I checked the voltage across it and it was 110v. It should have been 45v. After check all my values and connections and everything being okay, I narrowed the problem down to resistance from the grid to ground was off. I disconnected all the wires going to the 2A3, and still had 35k ohms between the grid and plate. I removed both sockets, and removed the tubes. Then the socket in question still had anywhere from 700k up to 30meg. Between any of the pin sockets. The readings were always different. The other socket had no continuity They were brand new sockets . Has anyone else had this problem before?
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