This circuit of a 1964 Electronic Design uses a photodiode from the time. Modern equivalent can be used. The standby current is 1.2 mA.
This configuration was obtained in a 1977 FET Databook. The circuit can be practically any JFET...
This circuit was found in an old American documentation. The transformer is of the type found in...
This circuit was found in an English publication from 1989. The integrated circuits are of the...