We find this circuit in an American 80's documentation. No further information about the transformer is given. The circuit serves as a reference for any repair work.
In the figure we have a practical circuit for a 50 kHz bandwidth amplifier using a photo diode as...
This circuit is intended to switch high frequency antennas using common diodes. The circuit is from...
An interesting interface solution that can be provided in some cases is the one shown in the...