This circuit uses two diodes in a doubling configuration to receive medium-wave range signals. The phone is crystal. We found it in a 1968 American documentation.
This 1971 circuit uses components that are not currently common such as the power transistors and...
In fact, this circuit found in a 1992 documentation does not have all this power. It consists of a...
We found this circuit in a 1980s Motorola documentation. The circuit makes use of common operating...