2 Sep
2004
2 Sep
'04
1:19 p.m.
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.
Joe
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