[sdiy] Building the ASM-1 Noise Source

[Magnus Danielson]

From: Michael -nil-x <nil at pressurepenetration.com>
Subject: Re: [sdiy] Building the ASM-1 Noise Source
Date: Tue, 21 Dec 2004 02:31:37 -0500
Message-ID: <41C7D159.30802 at pressurepenetration.com>

Michael,

> Well it ended up being something stupid. I had the transistor in 
> backwards. Oops. You know I triple checked everything and it was 
> something so simple.

It usually is. This is why I say things like "assume *nothing*".

> I had to use a different transistor to get a louder noise too.

This is natural. There are ways to increase the noise in a transistor, but you
don't want to learn the dirty trick of how... ;O)
(Hint: stress it slightly)

Cheers,
Magnus

> - Michael nil-x
> - Pressure : Penetration
> 
> harrybissell wrote:
> 
> >Hi Michael nil-x
> >
> >One major issue could be your selection of noise transistor. Some give only a hint of noise...
> >and allow massive amounts of hum that would be masked by a proper level of noise.
> >I had this problem with the MacDonald MiniModular when I first started it up.
> >
> >Another issue might be proper decoupling of the drive to the noise transistor itself. Sometimes
> >you need an RC filter on the supply...
> >
> >Last trick... use a couple of 9V batteries to power the circuit, eliminating the power supply
> >If the hum is gone, its the supply...
> >
> >H^) harry
> >
> >  
> >
>