12-16-2011, 03:30 PM
In need of some help on a GE model GD630. Replaced the filter caps and all the paper caps, did not change the brown mica caps and only 4 resistors. All the tubes have been checked and are good. It has a Ballast tube BL-49B, the voltage drop across pins 8&3 is 46.4v and pins 7&8 is 4.7v it is about 2v lower than it should be but steady.
Now the part that has got me going in circles. I turn it on and I get a hum (after it warms up) not real loud but its there as I turn up the vol and get nothing until about 75% rotation on the pot (10k checks out ok) I get sound (stations) but the vol is loud and distorted. All the heater voltages look good (maybe low about 1v) . Could I have the polarity of the filter caps reversed? Bad resistors? When I got the radio the filter caps were missing. Tried to go by the voltage chart but nothing matches up. Any idea's
Eric
Now the part that has got me going in circles. I turn it on and I get a hum (after it warms up) not real loud but its there as I turn up the vol and get nothing until about 75% rotation on the pot (10k checks out ok) I get sound (stations) but the vol is loud and distorted. All the heater voltages look good (maybe low about 1v) . Could I have the polarity of the filter caps reversed? Bad resistors? When I got the radio the filter caps were missing. Tried to go by the voltage chart but nothing matches up. Any idea's
Eric
