Analogue systems

On 2007-09-22 21:32 -0700, Monroe Eskew wrote:
> On 9/22/07, vcovcfvca <vcovcfvca@yahoo.com.au> wrote:
> >
> > I actually don't have any AS modules yet (I'm new here), but my
> > understanding is that the voltages on each wire of the ribbon cable
> > are actually in a different order from Doepfer which requires either
> > a purchased or DIY converter. (ie: you can't just plug the cable in
> > upside down). Check this diagram out:
> >
> > http://www.analoguehaven.com/usercomm/conversion.jpg
> >
> > -- or wait for someone else on the list with experience to answer.
>
> According to Big City Music, Doepfer modules can be directly plugged in:
> 
> http://www.bigcitymusic.com/product.asp?cat=New&pid=1000206
> 
> Analogue Systems website says the same thing.

You don't have to take anyone's word on it. Get a 10-EUR
multimeter from the hardware store. Switch to VDC. Connect the
black test lead to ground (chassis, the sleeve of a jack...).
With the red test lead, check the voltages on the ribbon cable.

Now follow the traces on the Doepfer modules. Dual op amps in
DIP8 packages (TL072, 4558, etc.) normally have the negative
rail (-12 V) on pin 4 and the positive rail (+12 V) on pin 8.

-- 
André Majorel <URL:http://www.teaser.fr/~amajorel/>
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