From: David Riley; Thursday, December 01, 2011 4:59 PM
I've been more seriously contemplating my QBUS
multi-purpose card idea now
that one of my other major projects is nearly done. I've been unable to find
any official or even quasi-official mechanical specs for DEC cards (QBUS,
UNIBUS, etc). I'm obviously looking in the wrong places, since there's a wide
degree of uniformity; I'm looking for things like board outlines, edge bevels,
component clearances and the like. The electrical specs are in quite a few
places, so I'm not worried about that.
Board outlines can be found at the front of various Logic Handbooks. They
only contradict each other a little bit :-). Likewise component clearances.
I haven't seen the edge bevel specified anywhere, but it isn't very critical
Interestingly enough, my Douglas CAD software for my
old Mac has DEC card
outline templates pre-stored. However, I'm not even entirely sure Douglas
makes PCBs anymore, and I imagine they can't beat my preferred board house on
price (I'd love to be wrong).
My Eagle CAD libraries have card outlines, edge connectors, and even
many of the obsolete parts. You can find them at:
I should really try get around to updating the copies there. If you plan to
use them (or see something important missing) let me know offlist and I'll
see what I can do.