This reflex receiver for the mid-wave range employs germanium transistors of the time. We found it in an English documentation from 1967.
In the figure we have the way to obtain an adjustable constant current source of 2 mA. The...
We found this circuit in a Popular Electronics of the 90s. The circuit can be easily mounted...
This circuit provides an output voltage approximately 2 times that of the input voltage. The...