This circuit is from a 1924 book by Gernsback. The receiver uses two tubes and listens to headphones. Power is supplied by battery with the indicated voltages.
This transceiver circuit was found in a 1997 documentation. The circuit operates in the 80 meters...
We found this circuit in the Linear Applications Handbook published by National Semiconductor in...
The configuration presented below was obtained in the Linear Application Handbook of the National...