Re: Noise and osci in audio amp

I'd recommend 100-330n plastic film caps for good measure. 10n is near useless for
power circuits at audio frequencies.

uh ok, I admit that I didn't calculate it, so I have to buy some of
these first (I'm not a professional as you know)..

Be very aware of common current paths. This is how the some proportion of the output
can easily couple back to the input.

Are you familiar with 'star-point' grounding ? If so, use this technique to establish
a separate ground with no significant current flowing through it to the input annd
feedback side of the circuitry.

No, didn't know of star grounding yet, but I think I've found some good
material to read on the web :) grounding seems even more important than
I thought, but fortunately it seems that most of my wireing already
follows this star grounding philosophy..

bye!
Dominik
.

Relevant Pages

  • Re: Noise and osci in audio amp
    ... power circuits at audio frequencies. ... a separate ground with no significant current flowing through it to the input annd ... No, didn't know of star grounding yet, but I think I've found some good ...
    (sci.electronics.basics)
  • Re: let me restate that...
    ... I had read that article and that's why I changed my grounding system to star grounding (from having lots of wires soldered to the chassis at various locations). ... there is a strong hum that goes away if I touch the strings or the amp ...
    (alt.guitar.amps)