Re: "People nowadays have no idea how sensitive electronics used to be."
By actual measurement the TTL threshold was 1.0 volts. While still in spec the noise from nearby TTL would often toggle TTL circuits. ECL, on the other hand, drove terminated transmission lines and was a much quieter logic family. The transition time from one to zero was ~ a nanosecond but TTL would swing 3 volts while ECL would swing about a volt. TTL was a very noisy logic family.
Biting the hand that feeds IT
