[sdiy] percusion synth design and problems.

[Grant Richter]

Just a note:

In order to demodulate an AM radio signal, all you need is a small
non-linearity. As it happens, virtually any oxidized metal will act in some
fashion like a diode and decode AM. So the best bet is to clean all your
connections.

> From: "Jay Schwichtenberg" <jays at aracnet.com>
> Date: Sun, 13 Apr 2003 15:12:36 -0700
> To: <synth-diy at dropmix.xs4all.nl>
> Subject: RE: [sdiy] percusion synth design and problems.
> 
> 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
>> 
>> 
>> _________________________________________________________________
>> 
>> 
> 
> 
>