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What value bypass cap on storage caps for Pioneer SX-1080

fazman

fazman

Active Member
Hi I was wondering what value (uf) cap I could use to bypass the big storage caps on the SX 1080. I have plenty of spare film and foil caps lying around of different values I thought I could use them to do this.
Also is it as simple as connecting them across the terminals of the storage cap. It seems it would be a matter of just loosening some screws and inserting the caps across, one for each cap and then tightening.
Would this be the way to do it or do I have this all wrong?

Thanks for your help
Dave.
 
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.1 or .01 uf ceramic caps[the disc shaped orange ones] are most widely used for bypass. Across the terms. is fine. I suppose film/foil would work if you can find the values. Just make sure the voltage is high enough, 100v or so.
 
The ceramic caps are already in place across the diode bridge...I use 2.2µf 250V metal polyester caps across the caps themselves.
 
What benefit does this provide? I know they do this in crossovers, but this application is a new one on me.
Also, are you guys talking about the big caps in the power supply or are these something else? I ask because I'm replacing some big caps (9000uf 55 V) in a Marantz 2270 and wonder if I shouldn't consider doing this also.
 
Andyman said:
What benefit does this provide? I know they do this in crossovers, but this application is a new one on me.
Also, are you guys talking about the big caps in the power supply or are these something else? I ask because I'm replacing some big caps (9000uf 55 V) in a Marantz 2270 and wonder if I shouldn't consider doing this also.
Click to expand...
Large can caps are wound like inductors...so ESR rises with frequency. A good quality film cap helps the cap 'look' like an AC short at all frequencies.
 
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