Filter capacitors effects on tone and sustain

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Earworm
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Filter capacitors effects on tone and sustain

Post by Earworm » Fri Jun 28, 2019 3:07 pm

Hello, is there alot to do with power supply caps and sustain, mainly on the high notes? Ive raised mine from 330uf to 390uf and my high notes don't seem to sustain much and pinch harmonics seem harder to do. Is there any correlation? Thanks

revolver1
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Re: Filter capacitors effects on tone and sustain

Post by revolver1 » Sun Jul 14, 2019 4:17 am

Hi sorry for a late response. I'm guessing your referring to the small electrolytic cap bridged by the 820ohm resistor on V1?

If so yes, the 330uf is over kill as it is. Its letting through a wider band of frequencies than is really necessary this can lead in part to flubby bass. Earlier Marshall designs ie; the bass circuit use a 220uf but some of the guys around here favour smaller caps to loose the flub.

So to answer your question if any thing I'd reduce the size of that cap not increase it. For my personal taste I like the standard 220uf or 330uf.

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