Devilfish mod - a well kept secret?

[Rob]

Yep.. You are right.. I had that mixed up with another recent modification
for the 303 sqr wave shaper, which is to change r35 to a 150k pot to be able
to manipulate the square wave harmonics in real time.  ; )

For distortion, all you have to do is to take r62 and replace it with a 250k
log pot. You can use a linear, but it is not as nice.  There *might* be some
other interesting things you can do by messing with the voltage divider
ladder on the input, perhaps putting a pot on r70. Never done it, but I have
always wondered.

I have *loads* of notes and mods that I no longer really pay any attention
to, since I have a huge notebook of ideas about ways of modding the 303,
just realized that sonically it wasn't always worth the trouble.

Rob

----- Original Message -----
From: Heiko van der Linden <h.j.vanderlinden at el.utwente.nl>
To: Rob <cyborg_0 at iquest.net>; *Star Project <ampe at swipnet.se>; DIY skicka
Lista <synth-diy at node12b53.a2000.nl>
Sent: Saturday, October 07, 2000 2:04 PM
Subject: Re: Devilfish mod - a well kept secret?


> Hi Rob,
>
> with a 150k log pot.. BTW, normally, its just a 100k resistor, but I put a
> > 150k in there cuz when you attenuate the signal going into the filter,
> this,
>
> Are you talking about the resistor that is inbetween the waveshape switch
> and
> the cap that feeds the audio into the filter ? I thought that one was
220k.
> Is this an error in the Roland schem ?
>
> And in the TB303 only 1/4 Watt resistors are used. Some are even mounted
> vertically
> to cram all those electronics in there.
>
> GReets,
> Heiko
>
>