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I want to parallel some cplg caps in my amp / the stock caps are 10uF 630V
what would be the correct ratio 1/100th of the original value ( 10uF) or 1/10th ? ..or ?
thanks
Edits: 05/27/07 05/27/07Follow Ups:
I believe you may be making reference to "bypassing" a coupling capacitor. Yes, you do indeed put the bypass capacitor in parallel to the original.
The ideal bypass value is 1/10th. The bypass cap may then be bypassed as well, and the bypassed/bypass may be bypassed, etc.
Ex Original cap 10 µf
bypassed by 1 µf
Bypass cap bypassed by 0.1 µf
Bypass of the bypassed cap bypass ed with a 0.01 µf
and so on.
DaveT
I have found that 1/100 (1%) works better.
I was going to use .1 as a bypass as it was affordable ..vcaps whereas the 1.0 is exxxpensive !
what would happen if the .1 is used compared to the 1.0 ...only high frequencies versus more with higher value ? .....
appreciate the dialogue !
The ratio is a rule of thumb and not an absolute. I first bypassed 10,000 µf power supply caps in a SS power amp with 5 µf polypropylene film capacitors. The bypass cap comes out to 0.0005 of the power cap. The impetus for the mod was based on a POOGE article by Dick Marsh and Walt Jung published in Audio Amateur magazine. I, subsequently, bypassed the 5 µf cap with 1.0 µf film and 0.1 µf teflon caps.
The result was a more percussive system. That is, the leading edge of all sort of percussion sounded more life like. There just seemed to be less smearing of bass and highs. Highs seemed to have more air around them. YMMV
DaveT
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