WOW!!!! $15k DEC PDP-8 CLASSIC MINICOMPUTER SYSTEM DIGITAL PDP8

Scott Stevens chenmel at earthlink.net
Thu Jul 7 21:55:48 CDT 2005


On Thu, 7 Jul 2005 20:23:16 +0100 (BST)
ard at p850ug1.demon.co.uk (Tony Duell) wrote:

> > Even where IBM cards of that era used 'commodity' components, they
> > were usually completely house-marked and impossible for a mere
> > mortal to figure out.  This goes all the way down to resistor
> > networks and resistors/capacitors (except those few that have
> > color-code bands.)
> 
> Yes, but it's easy to measure the value of a resistor or capacitor,
> and even resistor networks can generally be figured out. HP used
> custom house-coded resistor netowrks in some of their products and it
> didn't stop me...
> 

Figuring out alien unmarked and complex resistor networks is a nerds
treat.  It's a mathematical puzzle in physical form. 





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