8 May
2013
8 May
'13
7:09 p.m.
On 2013 May 8, at 6:54 PM, Chuck Guzis wrote:
On 05/08/2013 05:43 PM, Beau Walker wrote:
I'd say the card cage is of a different era than the boards, the
boards look to be of early-60's vintage. Looks like a date code of
6252 or 6232 on one of the power transistors. There are likely to be
date codes on other parts such as caps, trimmer resistors,
transistors, etc.
Today I picked up about 180 or so of these
boards. I believe they
might be
from the 60s or thereabouts. I couldn't find a datestamp on them
but they
don't use ICs. Instead it looks like they use the old gold-wired
transistors. Not all of the boards are pictured but there were many
duplicates so I probably got at least one of each kind.
https://plus.google.com/photos/107294052056201862492/albums/
5875735710367433393
Can't say much about the purpose, right off, but the card cage, if
it's part of the same lot (and it appears to be), contains some
Solid State Scientific, Inc. (SSS) SCL 4000-series CMOS ICs with a
date code of 1975. SSS persisted into the 1980s until it was
purchased by the Penn Central holding company and merged with Sprague.
So you've got a "not earlier than" benchmark.
I wonder if these are part of some control or security system.
Definitely not comptuer, given the date and technology. Kind of
nice to see those little red mica caps again.