Quote:
Originally Posted by Olorin67
lack of hum doesn't mean they are good, they could be shorted. you get hum when they dry out and have less capacity. if they short out, you don't get hum, you get smoke!
if here are wax capacitors they should be changes to they get electrically leaky as the oiled paper oxidizes and degrades. paper and electrolytic caps go bad from age, if they are not bad already, they will be soon.
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There are no paper capacitors in this unit, all ceramic capacitors, I didn't see where the power supply capacitors where in there, because like I said everything was on a printed circuit board that's attached to a metal chassis and then has a power transformer in it for isolation.
Edit: Found the power supply filter caps, it was a cardboard "can" with 4 wires coming out of one end, and the thing looks like it had gotten hot enough in its past to boil the wax coating a couple of times because the wax coating had bubbled up in several places and even leaked onto the plywood underneath that the case of the record player is made of and it looks like the capacitor might of even vented one or twice as the top of the capacitor housing was bulging pretty badly so I'm guessing that its going to need some new filter caps, its a 3 section can 100 MFD 400V, 75 MFD 400V and 70 MFD 25V. I have some pictures of what the capacitor looks like posted below.
The capacitor has some rather odd values in it so it might be a little hard to find some replacements for them. I'm sure my friend isn't going to be very happy to find out that the record player is going to need new power supply capacitors, because most of the record players he's bought haven't needed to have any work done to them except for having tube sockets cleaned or having to clean the cabinets or straightening out knob shafts that were bent. other than that they were working as found without needing any additional work done to them.