Not Circuit Related
3:16 Bible Texts and Donald Knuth's book
Cannonball Puzzle from my father-in-law
Fidelitone and FonoTwin , Dad's dual turntables
Heathkit , how I got started
Machine Epsilon , after "Hello World"
Sag and Tension Background , and approximation for Cosh (x)
Sag and Tension Graphing Calculator for suspended wire antennas or cables
"The Enciphered Letter" , Russian to English translation