Found in an 70s Electronic Engineering, this circuit divides the pulse frequency by non-integer numbers given by the positions of the switches.
Found in a 1969 Electronics World, this circuit is intended for amplifying analog cable TV...
Found in a 1965 General Electric circuit manual, this circuit uses SCRs from that time. Modern...
This circuit uses a quadruple operational amplifier of the time. The circuit is from the 70s but...