8 May
2013
8 May
'13
6:54 p.m.
On 05/08/2013 05:43 PM, Beau Walker wrote:
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/587573571036743…
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.
--Chuck