A very bad thing has happened....

[Mark Pulver]

Chris had said:

>>I disconnect everything and check my power supply output, it's +15v
>>and +1v (should be + / - 15). Ug. This is my small, .8amp supply, I use it
>>because it's the only thing that fits into my super compact roadcase
>>modular.

Much the same thing happened to me with my weirded "Moog 25" which uses a
*quad* supply of the classic +12 / -6 *plus* +/- 15.

I was playing along and all ov a sudden I had a 60hz tone at the output of
EVERY module. ie, you could plug the VCF straight into a mixer and hear a
60hz tone.

The -6 supply had gone south, and the -6 rail now had a 60hz AC signal
modulated on top of it. Nice...


jean-charles maillet (11:36 PM 7/10/97 -0700) had said:

>Or build your own from scratch, nowadays it's a trivial thing ... go get
>yourself a bunch of industrial 7815 and 7915's, a bunch of caps and
>resistors, you're rockin' ... hell, wire a whole bunch in parallel ... go
>crazy with cheapness ... it werks ...   :)~~

What I did was buy a International Power +/-15 supply and then build a
daughter board using a LM317K and a LM337K to step me down to +12 / -6. The
daughter board brings out 4 taps, +15, +12, -6 and -15.

Mark

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 Mark Pulver - http://shoga.wwa.com/~mpulver    The "Son of The MIDI Wall"
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