more rack ideas

[David Halliday (Volt Computer)]

> -----Original Message-----
> From:	Steve Jones [SMTP:sj2393 at ansys.com]
> Sent:	Tuesday, April 29, 1997 5:22 AM
> To:	Steve Jones; Martin Czech; synth-diy at horus.sara.nl;
> chrisc at zetnet.co.uk
> Subject:	Re: more rack ideas
> 
> On Apr 28,  3:32pm, Steve Jones too hastily wrote:
> 
> > These cards are (very) roughly 4"x7" or so, with the card
> > edges brought out to one of the narrow sides.  These cards
> > are large enough to hold an entire voice.  It has a very
> > beefy PSU as well.  Is (was) this any kind of standard?
> > The equipment (camera control) was probably 20 years old
> > or older (one of the cards comprised a single opamp!).
> > Is anyone familiar with this size?
> 
> There's a number of "standards" used in industrial control systems -
> don't know that there was any standard for wiring but the card size (
> and the 22/44 card edge connector ) was pretty stable.  The card cages
> were cheap and a good size to work with.
> 
> Hal Chaimberlain's book on Musical Applications of Microprocessors has
> the idea of putting a header on each card and using ribbon cable to
> daisy-chain them.  This is nice since you don't have to worry about
> making a backplane and you can loop from card to card even if the
> cards are not in a common rack.  He sugested Molex connectors ( Molex
> is a prominent manufacturer ) but ribbon cable may be better ( newer,
> cheaper, denser )  He drove the audio into current sinking inputs so
> cross-talk was minimised.