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News item #42; "Working on "It"": Tonight, I worked on "It", a.k.a. the "Quizmatic 8000" for a few hours, mostly desoldering the 4001 IC, soldering an IC socket in place of it, and then inserting a new 4001 into the socket. Unfortunately, this didn't fix the problem at all, but helps narrow the problem down. I suspected a few possible problems (three actually), and will soon begin on "Plan B". It appears that I need to add some kind of amplifier (transistor) before one of the inputs to the 4001, which hopefully will get "It" working again. -Chris Return (or click back on your browser.) Maintained and copyright 2002-2005 Chris Retlich, all rights reserved. Last updated on 08/08/19. |