ODP: Preamp Issues

[Roman Sowa]

compensate the opamps!

20-200 pF in feedback loop in paralel with 510k resistors
you might also lower res values to 1.5k and 75k respectively
(5Hz lower corner frequency)

use good power decoupling (want more on this? drop me an e-mail)

Roman

> -----Oryginalna wiadomość-----
> Od:	8brain at spiritone.com [SMTP:8brain at spiritone.com]
> Wysłano:	26 października 1998 04:17
> Do:	synth-diy at mailhost.bpa.nl
> Temat:	Preamp Issues
> 
> I've built myself a preamp out of electronotes.  The problem I'm having
> with it is that with no input, it oscillates wildly.  Not only that, but
> with an audio input in the second stage, at regular instrument level, the
> signal has oscillations mixed in.  What can I do to fix this?  Less gain?
> Caps in the audio path?
> 
> The html below is a scan of the article and circuit.
> 
> http://www.spiritone.com/~8brain/preamp.GIF
> 
> I appreciate any feedback.
> 
> Romeo.
>