Two-tube regenerative receiver (T1595E)

This circuit is from a Radio Electronics from 1949. The circuit is battery powered and has high impedance listening.

Ternary Decision Unit (CB6478E)
This circuit compares the voltages of the two inputs giving as output 0 or 1 according to the...
Bridge Signal Source (CB25892E)
This circuit provides voltages and a 1 kHz signal for measurement bridges. The circuit is from...
Noise limiter (CB7397E)
This circuit for audio applications was found in an English magazine from the 80's. The circuit...