This receiver circuit was found in documentation from 1924. The circuit uses two batteries, the high voltage one being 90 V.
Using the 709 integrated circuit, one of the first operational, this circuit was found in the...
This circuit can be used on a 0 to 14 V source with a current of 1 A. The PNP power transistor can be the...
The circuit presented is quite interesting due to the low-pass filter using the integrated circuit...