[sdiy] percusion synth design and problems.

[Jay Schwichtenberg]

Typically:

Long leads to inputs on op-amps/transistors.

Bad grounding or possibly unconnected grounds.

Power supply issues. Might try ferrites/inductors and higher freq bypass
caps.

How far you are away from a radio station. A friend lived a couple of
hundred yards away from one of the major radio/tv towers. He wrapped his
whole studio (well except the floor) in tin foil and grounded it all. Still
didn't keep all the RF out.


Good luck.
Jay


> -----Original Message-----
> From: owner-synth-diy at dropmix.xs4all.nl
> [mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of Arun Bohm
> Sent: Sunday, April 13, 2003 2:24 PM
> To: synth-diy at dropmix.xs4all.nl
> Subject: [sdiy] percusion synth design and problems.
>
>
>
> Hi, Was working on this here percusion synth idea and was wondering why,
> instead of damped oscillations, I was getting so much noise.
> Because I am a
> novice, I am used to making the mixing stage from manuals I got
> from radio
> shack(don't laugh, please) the amp I use is a utility amp using a
> 386 chip.
> The end result is all this RF transmission (I actually get some
> AM station)
> and a bunch of noise. What can I do to eliminate this problem? Any
> suggestions would be appreciated.
> arun_bohm at hotmail.com
>
>
> _________________________________________________________________
>
>