An outboard bank of caps is FAR less effective than capacitors placed as close as possible to the output devices. That is, as far as storage devices go and minimizing sag on the rails.
As far as the 60 Hz voltage vs the rail voltage goes, the 60 Hz voltage will always be higher than the rails in most conventional designs. If one were using only partial rectification and not a bridge, the charging rate would be far more cyclical. As it is, the cycling with the resultant "glitching" that occurs during a typical charge rate has to do with the diodes themselves turning off and on, which produces ringing and distortion. This can be seen in many amps as a 120 Hz and sometimes even a 180 Hz resonance. This is why many designers are switching over to diodes that recover more quickly as they produce less noise.
Other than that, believe me, a good iso transformer will do GOBS more for you than a bank of caps could in terms of the filtering of noise. Having said that, i am a BIG fan of large capacitor reserves within the component itself, especially in power amps. That's why i've purchased BIG electrolytic cans by the box-full. Sean
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As far as the 60 Hz voltage vs the rail voltage goes, the 60 Hz voltage will always be higher than the rails in most conventional designs. If one were using only partial rectification and not a bridge, the charging rate would be far more cyclical. As it is, the cycling with the resultant "glitching" that occurs during a typical charge rate has to do with the diodes themselves turning off and on, which produces ringing and distortion. This can be seen in many amps as a 120 Hz and sometimes even a 180 Hz resonance. This is why many designers are switching over to diodes that recover more quickly as they produce less noise.
Other than that, believe me, a good iso transformer will do GOBS more for you than a bank of caps could in terms of the filtering of noise. Having said that, i am a BIG fan of large capacitor reserves within the component itself, especially in power amps. That's why i've purchased BIG electrolytic cans by the box-full. Sean
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