We found this circuit in a 1957 Raytheon transistor publication. The circuit can be assembled with more modern transistors with minor changes. The handset must be high impedance magnetic.
This circuit was found in a 303 Circuits issue of Elektor magazine from the 1990s. The circuit uses...
With the name of transitube we find this MW receiver in documentation from the 50's. It uses a...
The 1: 1 transformer on this circuit found in a 1967 Electronics World can be wrapped around a...