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Dirtbag - Clock noise reduction?

Started by Chi_Boy, January 19, 2012, 02:51:30 AM

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Chi_Boy

I haven't seen anything here about how to adjust the balance trimmer on the Dirtbag.  The only thing  read was to set it at noon and move on.

Well, I found and old Mark Hammer post about using that adjustment to tune out clock noise.  I was hearing some clock noise when biasing the chips so i tried it. 

With nothing being fed into the input, I probed pin 3 of IC5 and could clearly hear the clock.  Tweaking the balance trim eliminated it or at least reduced it to the point that I couldn't hear it.  YMMV.

Like I said, I don't know if this is common knowledge and I just missed it, or if this is new, but here it is anyway.

gtr2

Are you biasing unboxed?  If so you'll experience some clock noise until it's in an enclosure.

Josh
1776 EFFECTS STORE     
Contract PCB designer

Chi_Boy

I think I should have posted this in the general forum, not tech help.  I'm not actually requesting help.  Just reporting info I learned.