[COFF] 52-pin D-Sub?

[Adam Thornton]

Yeah, 0.075" pin centers, does appear to be the ITT Cannon part.

Now what experiment used them, and _why_ (I mean, surely 68-pin SCSI would
have done the trick as well and been muuuuuuch cheaper), I don't know.

Adam

On Thu, Feb 27, 2020 at 6:37 PM Lawrence Stewart <stewart at serissa.com>
wrote:

> Huh.  New to me too, but Digikey links to the datasheets, and they really
> do mean DB.
> They go up to DD100.  They are called “double density”.
>
> This reminds me of the circa 1990 “HIPPI” interface, or high performance
> parallel interface.  They typically ran at 50 MB/sec.  The connectors were
> two-row 100-pin D style.  See
> http://www.elpeus.com/scsi-cables/100pin-scsi-cable-hippi/3m-100pin-male-to-100pin-male-scsi-cable-hippi/ for
> example.
>
> We used these cables and connectors on the first Alpha machines at Digital
> to connect the 3Max front end processor to the ECL based Alpha
> Demonstration Units, although the protocol was different.  The connector
> was about the biggest that would fit on a TurboChannel I/O card.
>
>
> On 2020, Feb 27, at 7:04 PM, Dave Horsfall <dave at horsfall.org> wrote:
>
> On Thu, 27 Feb 2020, Adam Thornton wrote:
>
> I recently have pulled out of the trash a plugboard with a male and a
> female D-Sub 52 connector.  3 rows of pins, 17-18-17.  I took the
> connectors off the board: there's nothing back there, so this thing only
> ever existed so you could plug the random cable you found into it and its
> friends to see what the cable fit.
>
>
> That would be something like a DD-52P (certainly not a DB-52P!).
>
> I can't find much evidence that a 52-pin D-Sub ever existed.
>
>
> Well, Digikey seem to have them:
>
>
> http://www.digikey.com/product-detail/en/itt-cannon-llc/2DB-52P/2DB-52P-ND/4734668
>
> No photo, though...
>
> -- Dave_______________________________________________
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