18 Jun
2020
18 Jun
'20
6:22 p.m.
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