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Restoring Sansui AU6500
Restoring Sansui AU6500
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Old 21st March 2011, 05:12 PM   #1
KanedaK is offline KanedaK  Belgium
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Join Date: Feb 2011
Default Restoring Sansui AU6500


I have my dad's SANSUI AU6500 integrated laying around, unused.
The volume knob is broken (misuse?) like it's "blocked" inside and won't turn. Otherwise it's in working condition. It's a nice little amp and since it was my dad's I thought maybe it would be a nice project to try and restore it. My first goal would be to find a matching pot for the volume. Actually i'd like to replace it with some cheap stepped attenuator from china (ebay sold). Something tells me these still sound better than "low end" regular potentiometer. Does the value has to be the same? what difference if I choose another value?
Also, the caps might need replacement. What to do? same voltage - different value, or same value - more voltage? I'm confused...

thanks guys
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Old 21st March 2011, 07:31 PM   #2
jaycee is offline jaycee  United Kingdom
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Join Date: Apr 2004
Location: Norwich, UK
Replace all the electrolytic capacitors with the same capacitance values (or as close as possible) with the same or higher voltage rating.
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Old 21st March 2011, 08:06 PM   #3
Mooly is offline Mooly  United Kingdom
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Restoring Sansui AU6500
Hard to say on the volume control without seeing it.

Some amps had a "true" switchable loudness control that implies the pot would be a 4 (8 for stereo) leg device rather than a 3 (6) leg. If not the value probably isn't critical eg a 22k would be fine for a 10 or 47k. Usually lower is better as hf response is affected less by capacitance on the circuitry that the wiper of the pot works into.
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