[sdiy] Moog noise source schematics

[Terry Michaels]

>Message text written by Terje Winther
>OK, I give up.
>I have tried to find the schematics for the old version of the moog
modular
>noise sound source (not the "slightly" newer ones with both white and pink
>noise outputs - but the one with only white noise output), module 903.
>Anyone?
>Can I just use the "white noise" part of the 903A schematics?

>In some listings the module is listed as "an older module, used on some of
>the first systems".

>tw.  :)<

Hi Terje:

I have the schematic for both versions.  The 903 has a rather complicated
design which appears intended to maintain the output, which is direct
coupled, at zero volts average potential.  The output of the 903A is AC
coupled, making for a much simpler design.  Both designs use no IC's, of
course.   Unless you want to build a 903 for historic purposes, I would
recommend building the white noise section of the 903A..

Terry Michaels