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1948 Westinghouse Model 1821 (182) audio problems
#14

Quote:Electrolytics can have health issues in at least two ways. One, mentioned, is that they lose capacitance from "drying out" and the equipment develops hum. The second issue that may occur is that internal leakage can increase, or even a short circuit develop. That may take out the rectifier and the power transformer if you are unlucky.

A more cautious approach would be to check the leakage current if you have the facility to measure it, or follow a more controlled reforming process. There are articles on-line on the subject of re-forming, for example...

Thanks Ed, I will look into those Articles. I am familiar with using a variac and bringing a radio up to half power (60 volts) and then leaving it there for a few minutes to reform power supply capacitors and then bringing it up to full power after about 10 minutes or so of running.

I have seen repair videos online from people like Shango066 and Mr. Carlson's Lab where they do stuff like that (they do eventually replace the original electrolytics with new ones but they power them up that way just to test to see what the radio's current working order is as far as what kind of work its going to need).

I do have a variac, but that's about it, just the variac, I don't have a box or anything that its wired into.


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RE: 1948 Westinghouse Model 1821 (182) audio problems - by captainclock1988 - 04-14-2020, 12:50 PM



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