1940s commercial receiver (T1618E)

This receiver was found in a Radio Electronics from 1949. It is a superheterodyne of the time using 6 tubes.

High Input Impedance Amplifier (CB3945E)
This circuit consists of an emitter follower, presenting unit voltage gain implemented with an...
Bicycle Signaler (CB6758E)
This configuration similar to many of this site was found in 1965 General Electric documentation. Modern...
Positive Voltage Regulator (CB5461E)
The integrated circuit used in this regulator is not very common today. The circuit is from old...