Two-tube regenerative receiver (T1595E)

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

Computer Voice (CB9859E)
The oscillation of the relay causes the applied audio signal to deform and start to resemble the...
Headphones Amplifier III (CB976E)
We found this amplifier in a publication of 1990, but it can be mounted today with some exchanged...
Naval Battle Game (CB16233E)
We found this project in an old publication from 1983. The circuit uses 4 switches of 1 pole x 8...