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happy new year friends,
just picked up a clean 4312 here locally. right channel's output is only around 50% of left. when i go to "mono" on tuner, levels are equal. any suggestions what this could be?
a million thanks,
mike
Follow Ups:
and they are most likely being caused from bad capacitors on the emitter bypass or coupling to the base of the input or from the output coupler..If you can solder,you can probably repair it yourself as it's usually a small value electrolytic capacitors in the 1uf to 2.2uf range.
"If it measures good and sounds bad, it is bad; if it measures bad and sounds good, you have measured the wrong thing."
- Daniel R. von Recklinghausen
thank you one and all!
i'm presently fighting the flu ... as soon as i can i'll look at schematic and see if i can find caps you're talking about, michael. i'm comfortable w/ a soldering iron.
thank you again and happy new year,
mike
Looking at the schematic, the only thing easy I can see is to try and clean the selector switch adn separation control pot with tuner cleaner or deoxit. If that doesn't help, you will probably need to have someone go over it, including an alignment.
If you don't want to put the money into it, and want to get into it yourself, there are separation threshold relays. Try jumping the signal path relay contacts.
I might get some (warranted) static about this, when these tuners were originally designed and aligned, house voltage was closer to 110, now 120. If you happen to have a variac, dial it back to 110 and see if that helps.
Congratulations, that is such an elegant-looking tuner! Foster Blair fixed mine, maybe you should send it to him. Good luck!
Foster Blair rebuilds and repairs all types of vintage Scott equipment, including amplifiers, tuners, multiplex units, and the hardest to work on, tube receivers. He has over 35 years experience working with Scott equipment and has an extensive collection of vintage Scott gear. Foster has the necessary test equipment, schematics and knowledge to fix dead, sick or wounded Scotts at very reasonable cost. Contact Foster at fjblairATcomcast.net (replace the AT with an @ sign)."
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