Kearney & Trecker Core memory, may be PDP8

Paul Anderson useddec at
Wed Nov 12 00:11:44 CST 2014

A clearer pic of the rear of the board would have been nice. I compared it
to an MM8-AB and that appears to be what it is.

On Tue, Nov 11, 2014 at 11:12 PM, Noel Chiappa <jnc at>

>     > From: Paul Anderson
>     > The first board is definitely a DEC core board. If it will help
> anyone
>     > I can pull a MM8-A and MM11-D and compare them to the pic to see
> which.
> That would be really useful.
> If I had to bet, I'd go with the 8: DEC SPC/MUD memory boards often have
> CA1
> jumpered to CB1 (NPG), and I don't see that here. And the way CC1 is ganged
> to CF1 to CT1 is very odd - CC1 is Parity A in an SPC/MUD slot. (Yes, it
> could be for a specially wired system unit - but those don't usually use
> hex
> cards.) And then there are a number of different kinds of component (e.g.
> the
> transistors in the cans, TO-18 I think?) which seem to be in multiples of
> 12.
> Too bad there's no picture of the edge of the handles to give us an
> M-number!
>         Noel

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