Electronics Repair

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Audio power amp protection circuit function?

http://home.graffiti.net/diverse:graffiti.net/prot.jpg The thermal switch monitors the heatsink but what is the functio...
4 comments posted 18yrs
posted by diverse8
4 comments posted 18yrs posted by diverse8

dim VFD

Got this old 80's Panasonic VCR. Been in the family before I was even born. It's VFD screen has gotten ultra dark, and...
5 comments posted 18yrs
posted by blackevilweredragon
5 comments posted 18yrs posted by blackevilweredragon

Mitsubishi HS-661V

Mitsubishi HS-661V When programming there is a option at the end, after the time for a (p) or (t), (p) is the default o...
1 comments posted 18yrs
posted by bm
1 comments posted 18yrs posted by bm

Reparing a AA Duracel Flashlight

I have a common Duracell flashlight that uses two AA batteries. One of the two orange buttons on either side that hold...
8 comments posted 18yrs
posted by wolf_tracks
8 comments posted 18yrs posted by wolf_tracks

Humming noise.

A few hours ago, I turned on my old antique electric table fan on the little end table by doggy's end of her couch.At a...
19 comments posted 18yrs
posted by cuhulin
19 comments posted 18yrs posted by cuhulin

"Heat Sink Putty" ?

Any such thing? I'll have a little bridge rectifier and voltage regulator serving a bicycle hub alternator (6v 4w) and...
17 comments posted 18yrs
posted by x
17 comments posted 18yrs posted by x

quiet or torriodal linear supply?

hi was trying to find a power supply i could use with my ham gear , thats around 13v dc and 30-50 amps and must be anal...
12 comments posted 18yrs
posted by m
12 comments posted 18yrs posted by m

help identify component

Hello, this looks like a japanese transistor (same case of the 2sd973 for example), marked as N1215 '95 ('95 could be a...
13 comments posted 18yrs
posted by francesco.messineo
13 comments posted 18yrs posted by francesco.messineo

Question......I am no expert but.....

can I replace a 4.7 uf 250 volt cap with a 4.7 uf 350 volt capacitor without doing damage or does it have to be the same...
5 comments posted 18yrs
posted by andy
5 comments posted 18yrs posted by andy

Old radio ...

I don't suppose by any remote chance, that anyone has got the old 'Trader' service sheet for a Roberts model RMB from 19...
9 comments posted 18yrs
posted by arfa.daily
9 comments posted 18yrs posted by arfa.daily

Digicrystal SDT-9077P STB remote control problems

I've been investigating intermittent temperature-related strange remote control operation in a brand new SDT-9077P. Whe...
7 comments posted 18yrs
posted by bobp.deletethis
7 comments posted 18yrs posted by bobp.deletethis

TO220 , TOP3 etc mounting washers ?

Not the usual nylon or whatever ones that I never trust for high temperatures (soften and deform over time, loosening t...
13 comments posted 18yrs
posted by diverse8
13 comments posted 18yrs posted by diverse8

Please, help me

Good morning, I search a contact for HH Scott (for vintage products, electrical schemes and manual). I find the site of...
4 comments posted 18yrs
posted by radudd23
4 comments posted 18yrs posted by radudd23

Some Litton Microwave Parts Still Available

Some Litton Microwave Parts Still Available Litton was taken over by Maytag, but as of now, parts are still available f...
17 comments posted 18yrs
posted by prototech
17 comments posted 18yrs posted by prototech

Belts Radio Shack SCT-540

I need a source for drive belts for a Optimus / Radio shack Tape deck. Cat # 140-0678 Model SCT-540 Reference # 44 1218...
1 comments posted 18yrs
posted by hobbob123
1 comments posted 18yrs posted by hobbob123