Unibus (was Re: VMS Documentation CD-ROM &unibus question)

From: Pete Turnbull <pete_at_dunnington.u-net.com>
Date: Wed Jun 13 13:16:36 2001

On Jun 13, 6:47, Ethan Dicks wrote:

> Does anyone know of a modern connector that will substitute for a real
> DEC connector? The H-11 used a different one for its Q-bus backplane,
> for example.

> In case anyone who knows connectors doesn't know the DEC specs - the pins
> are on 0.125" centers and the edge connector is somewhat taller than, say
> an ISA connector or a 5.25" floppy edge connector (it's 0.625", but the
> Heath connector does not accept the entire length)

Neither does the genuine DEC connector. The contacts in the connector only
use the lowest 0.475" of the card edge, although the contact area extends
to 0.56" from the edge of the board. The housing part of course is shaped
to ensure you don't plug a dual- or quad-height card in backwards. Anyway,
I just checked on an S100 edge connector (same 0.125" pitch), and its
contacts are the same depth as the DEC ones. S100 connectors are getting
expensive thses days, so cutting them up probably isn't a good option, but
I'm sure any standard 1/8" pitch edge connector will do if you're not
worried about the keyways.

Pete						Peter Turnbull
						Network Manager
						University of York
Received on Wed Jun 13 2001 - 13:16:36 BST

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