We found this circuit in the 1960 Mullard transistor reference manual. The phototransistor can be a modern equivalent and the capacitors, as well as the inductor, depend on the frequency of the received modulated signal.

We found this circuit in the 1960 Mullard transistor reference manual. The phototransistor can be a modern equivalent and the capacitors, as well as the inductor, depend on the frequency of the received modulated signal.