Tubes Asylum

RE: RCA MI-9257C

76.73.232.216

In Reply to: RE: RCA MI-9257C posted by Michael Samra on October 02, 2009 at 19:01:15

Hi guys just an update. It was a bad PS cap (well a couple). I did replace them and powered back up. I do have sound but very faint and noisy. Not sure where to go from here as my voltages are all over the place. The 991 tubes that are part of the voltage regulator one seems to be bad. They look like regular light bulbs BUT there posts inside the chassis have 330 volts. I don't know if this would cause the issue with voltages being erratic. I have 364 volts at the first output tube but no plate at the 2nd one. The heater are lit. My guess would be to disconnec the voltage regulator as those 991 tubes seem to be tough to come by. Any ideas or HELP appreciated.
Allen 75's,Eico HF60's Dyanco PAS3x, Orcale Delphi Mark 2, RCA MI-9358A, MI-9257C

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