logic rack?

From: Joe R. <rigdonj_at_cfl.rr.com>
Date: Thu Sep 2 20:19:20 2004

   More info.

   I brought home three cards from the rack and I've been looking at them.
One has 2N297 (see
<http://semiconductormuseum.com/PhotoGallery/PhotoGallery_2N697.htm>) NPN
Switching transistors dated 1968. Another has 2N1309s dated 1969. The other
has three green modules about 1/2" tall x 9/16" wide and 2 1/2" long.
They're marked MKC Electronics KC Kansas. They have three connections at
one end and two at the other. I suspect that they're relays. I can't see
any markings on the diodes.


At 08:45 PM 9/2/04 -0400, you wrote:
> I got a call from a scrap place today and I made a quick trip out to see
>what they had before the hurricane hits (it's due to cross DIRECTLY over
>the place's location so I don't expect the stuff to be there come Sunday AM
>since most of the stuff is out in the open). Got some DEC core memory so
>the trip was worth it. One of the things that I found was a "Logic Rack"
>made by (somebody) Research & (something). Sorry to be vague about the name
>but I was in a hell of a rush. Anyway it said that they were a division of
>XEBEC. The rack was ABOUT 8" or 10" thick and ABOUT 32" wide and ABOUT
>seven foot tall and had HUNDREDS of small circuit cards that plugged into
>it. None of the ones that I saw had ICs, just glass diodes, trqnsistors and
>resistors. The cards are 4" long and 2 3/16" wide with a 16 position CINCH
>contact on one end. The transistors that I looked at were all date coded
>1969 but I saw what looked like it might have been a date on the rack that
>said 1973. Anybody know what this is?
> Joe
Received on Thu Sep 02 2004 - 20:19:20 BST

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