08-20-2024, 03:31 PM
A freind asked me to take a look at an PHilco Model 80 Jr with the idea of getting the electronics to work. He's the woodworker in group and did a great job restoring the cathederal cabinet, But I an going crazy with the electronics..It appears there has been to previous attempt at restoration or repair.
When I powered it up using the variable transformer to ease it into operation. I saw all the tubes and pilot light light up. Tried measuring the voltages on the tubes..First thing I noticed that even though voltages were the right magnitude my meter showed them as minus. Also, there is no B+ on the plates of the 42 and the 36 of the detector Oscillator. There is Voltage on the Screen grids. Sooo. Any clues about the polarity issue? I tried using the chassis as a ground and the cathode of tube I was measuring as ground.
Any help would be appreciated?
Brian Cieslak K9WIS
When I powered it up using the variable transformer to ease it into operation. I saw all the tubes and pilot light light up. Tried measuring the voltages on the tubes..First thing I noticed that even though voltages were the right magnitude my meter showed them as minus. Also, there is no B+ on the plates of the 42 and the 36 of the detector Oscillator. There is Voltage on the Screen grids. Sooo. Any clues about the polarity issue? I tried using the chassis as a ground and the cathode of tube I was measuring as ground.
Any help would be appreciated?
Brian Cieslak K9WIS
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