On Sat, Mar 13, 2021, 1:04 PM Chuck Guzis via cctalk <[email protected]> wrote:
> On 3/13/21 11:43 AM, Cory Heisterkamp via cctalk wrote: > > I’m wondering if anyone recognizes this PCB. Double-sided, 74xx > vintage, measuring 14”x15”. There’s a “B.I.” logo in one corner, but no > google match. IC date codes are ’77/’78 vintage. > > > > There’s a pair of DB-25’s, a BCD encoder, and for some reason, two pots. > DC rectification appears to take place onboard. I thought perhaps the > 112-7753 marking might be a part or catalog number, however the flip side > is marked 112-1754, so perhaps not. > > > > Anyone recognize it? -Cory > > > > https://photos.app.goo.gl/dogAPxn7vLV87YRw9 > > Looks like the board from a B100. Note the connectors and switches on > rear panel that seem to correspond with this: > > https://deskthority.net/wiki/File:Beehive_B100_terminal_back.jpg It matches my recollection of the day I took the one we had a school... secretly so the teachers wouldn't get mad... Warner > --Chuck >
