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

From: Ethan Dicks <ethan_dicks_at_yahoo.com>
Date: Wed Jun 13 18:03:11 2001

--- Tony Duell <ard_at_p850ug1.demon.co.uk> wrote:
> As you mention below, it's 0.125" pitch. The only other common connector
> with that pitch is (IIRC) the S100 edge connector. Consider cutting some
> down :-) :-) It'll look a right mess, but it should work.

I can get 28/56 pin connectors (~$4 each) and cut them down - I'm looking
at a Sullins EZA28DCSN. Given that I'm attempting to replicate a DEC H851,
I suppose I could cut two down to size, but put them on a PCB with the cut
edges on opposite sides, providing for _some_ sort of left-right registration
integrity. The PCB would be about 2.5" by 1" with 72 holes. Depending on
quantity, they might be <$10 for double-sided with plated-through holes.
A single-sided version I could do at home on a prototype run (never tried
to burn double-sided boards at home).

This is a perfect example of why it's better buy than make electronic bits.

> Incidentally, has anyone ever seen a 0.125" pitch 44 pin (22 pin DS) edge
> connector. No, I don't mean 0.156" (I was asking about those a few weeks
> back, I know). The 0.125" version is used as the expansion connector on
> one classic (very classic) desktop machine.

Sullins has a 50/100 0.125" connector in a high-profile (0.265" insertion
depth) - EZA50DCSD You could cut _that_ down.

Anyone know of any other 0.125" edge connector manufacturers?

> Minor puzzle : Which machine?

No idea.


P.S. - These numbers brought to you courtesy of page 170 of the DigiKey

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Received on Wed Jun 13 2001 - 18:03:11 BST

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