Quote:
Originally Posted by maxhifi
Double check that all the tubes are in the right places. The 35Z5 can cause hum related problems sometimes, try replacing it.
I think checking the radio against the schematic will probably find the problem faster than typing on here. Measure all the voltages too, and compare vs riders. Double check elecrolytic capacitors for polarity.
When you check the wiring, don't take for granted anything in that radio is correct - the speaker is already at least 15 years newer than the radio itself, so who knows what else was changed.
If it's not a tube, or something simple, Use signal tracing to fix the radio. Go through the radio stage by stage, and touch the grid of each tube with a screwdriver. Work backwards, starting with the 50L6. You should hear a noise in the speaker each time you touch the grid. When you hear nothing, you have isolated the stage where the signal is dissapearing.
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Thanks ,I'll try that this weekend I have got some time to go through everything and try to isolate the problem.