8 May
2013
8 May
'13
8:33 p.m.
It looks like the DEC boards are 4 M7264s LSI11), a M7270 (LSI2), 2 M8044
(MSV11-DD), and a few compatables.
Paul
On Wed, May 8, 2013 at 9:09 PM, Brent Hilpert <hilpert at cs.ubc.ca> wrote:
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<https://plus.google.com/photos/10729405205620…
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.