This circuit was found in a 70s American documentation. The converter can be of any type and the power supply for the operators must be symmetrical.
With this circuit it is possible to modulate a small signal in amplitude using a common germanium...
This low current parallel or shunt type regulator was found in documentation from the 60's. The...
I found this circuit in a 1986 English magazine. It can still be easily assembled, replacing the...