Delete comment from: Ken Shirriff's blog

Rob Weinstein said...

Fun read!

You mentioned that this is a 2-sided board. Does it employ plated-thru holes or do they rely on component leads to join the traces on both sides?

Also, the inline circuit diagrams show PNP transistors but the Eagle schematic shows NPN. It would seem that PNP is correct based on the negative Vcc.

Thanks for shedding light on this early technology.

-Rob

Apr 5, 2022, 12:20:52 PM

Posted to Reverse-engineering a mysterious Univac computer board