General > General Technical Chat
Whats this board?
pepelevamp:
Just saw this on NZ's version of ebay called TradeMe. Anyone got some guesses as to what kind of board this is? Its in the vintage computing section, but it might not necessarily be computer / PC related.
I have one or two ideas but I'd like to see what you lot think
https://www.trademe.co.nz/computers/vintage/listing-2381126135.htm
jmelson:
The C106 components are SCRs.
Jon
Cyberdragon:
--- Quote from: jmelson on October 31, 2019, 08:33:19 pm ---The C106 components are SCRs.
Jon
--- End quote ---
No, too new and the wrong package.
These are (2S)C106 signal transistors.
It appears to be from the late 60s to mid 70s and judging by the identical columns of components and use of lots of diodes (for logic) it appears to be a logic board out of something like a calulator or digital meter.
mengfei:
could be an IBM interace card :)
check these out
https://vipclubmn.org/Artifacts.html
http://www.righto.com/2015/03/a-database-of-sms-cards-technology.html
VK3DRB:
--- Quote from: mengfei on November 01, 2019, 03:16:23 am ---could be an IBM interace card :)
--- End quote ---
Definitely NOT an IBM interface card for four reasons:
1. No IBM card soldered to gold tabs.
2. Prior to the early 1908's, IBM used their own part numbering schemes of everything, including discrete semiconductors.
3. Workmanship is generally poor. Wire-adds were never placed in such a haphazard way on IBM cards and there is no bevelling on the card connector edge.
4. ALL IBM PCBAs and PCBs have the part numbers and usually the EC number on them as well.
I worked for IBM for many years on a very wide range of equipment made from 1926 (ICT) until 1999, covering a broad range of technologies, from valves (vacuum tubes) right through to advanced VLSI. That includes IBM's SLT boards which are vaguely similar to the board shown here.
It looks like a board out of an old adding machine, early impact printer or OEM tape drive. In any case, EMC was never a consideration!
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