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In Reply to: RE: Fixing 70s solid state amps and receivers and common problems. posted by Michael Samra on January 07, 2015 at 17:16:04
Hi Mike,
Now you talking the bulk of what I have. I would add that cold solder joints also are a common problem. I am trying to teach myself how to work on this stuff.
It turns out that my RatShack volt/ohm meter that I bought years ago to measure the throttle positioning sensor on my 86 5 liter Mustang, also has a capacitance meter. Would this be useful in checking these capacitors?
Of course it would be best to replace them with film, but usually there is not enough room, so an electrolytic is required. What electrolytic capacitors do you use to replace them?
TIA,
Dave
Follow Ups:
No, you need an ESR meter to check the small 'lytics. Your VOM will only tell you if the capacitance is correct. Bad caps usually read the same capacitance but have a high ESR.
I knew it was time to pony up the money for an EST meter. Fortunately the are not very expensive.
Dave
Dave, not the go off topic too much but what is a good and inexpensive ESR meter?
I'm assuming my Heathkit CT-1 isn't very useful.
looking for some jazz and a little libations - joe strummer
Hopefully an inmate with more experience them me will chime in. I do repair, but it is pretty basic stuff. Actually, I suspect that as long a the Heathkit is functioning properly, it will do. I don't think it has to be that accurate to see that a capacitor is out of commission.
The Blue looks interesting but I don't really know if it is good (see link). I to have a vintage tube ESR meter that was given to me by a retired TV repair man, but I need to bring it up to spec. He thought it was still usable!
Dave
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