Found in a 1967 EEE, this circuit oscillates at 20 MHz according to the values of the given components. The FET can be of general use. The coil has only indicated the number of turns.
This circuit of a 1964 Electronic Design uses a photodiode from the time. Modern equivalent can be used....
This VCO or Voltage Controlled Oscillator was found in a Popular Electronics from 1991 but can be...
We found this circuit for an anti-theft radar that operates at 400 MHz in a Radio Electronics from...