7 Mar
2005
7 Mar
'05
12:05 p.m.
From: "Brad Parker" <brad at heeltoe.com>
"Ulf Andersson" wrote:
I feel certain that this is in the logic handbooks. I have certainly done
CAD drawings of smaller DEC replica boards from the dimensions there without
problems.
Hello Gents & Ladies,
anyone here know anything about the physical dimensions of
UNIBUS and Q-BUS boards? I'd like to know, that's all.
I was just thinking about that this morning :-)
Does anyone have a blueprint which shows the "spec" dimensions?
I could use a micrometer but I thought it must be in a print somewhere. And, while I'm asking, anyone have thoughts on
what will happen to QBUS
or Unibus backplane connector if I put a card with fingers which are
HASL finished (hot air solder layer) as opposed to gold?
The idea is that a production board would have gold fingers but a
prototype might just be "blown solder over copper", i.e. HASL. I'm just
wondering if the solder will damage the backplane fingers. I realize
that over time the solder will form channels and may stop working - I'm
not worried about that for a prototype.
I think it will be fine. I have done this with boards without problems,
though I haven't tried leaving them in there for 30 years or anything...
Vince
What do you know...I'm on topic :-).