19 Jun
2020
19 Jun
'20
2:49 a.m.
Core memory driver board?
On 19/06/2020 02:22, Boris Gimbarzevsky via cctalk wrote:
Remember buying boards like that at electronics
surplus places in late
60's but never knew where they came from.? Just used them as a cheap
source of parts.? Also suspect the black boxes are pulse transformers
although all of the pulse transformers I pulled off boards were
circular.? Never thought much then about where they came from and just
got ones with most transistors and diodes on them so could make DTL
logic gates from them.? Think a board like that might have gone for
$1-2 back then which was way cheaper than buying new transistors and
diodes in those days and TTL IC's were ridiculously expensive then.
Boris Gimbarzevsky
OK, now here are some pics that should be
available to everybody. I
hope.
https://photos.app.goo.gl/h64tye8ecmPHQfJD7
Smells of (early) 1960s transistorized.
No helpful marking apart from
*?????? "GATE JJ01" on SIDE A. (components).
*?????? "C NT OL DATA" on side B (solder traces).
Big transistors are Motorola "180376008". Also, any ideas what the
"246 636
B" boxes are, they have four legs?
A curse on TinyURL and praise to Camiel Vanderhoven.
peter