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 circuit was originally designed to drive an engine with a small flower that dances when the...
In the figure we have an RF amplifier for tunnel diode. The frequency range will depend on the...
Using two common operationals, such as 741, this circuit serves as a medium control in an...