We found this circuit with JFETs in a Radio Electronics magazine from June 1969. The circuit has its assembly described in a complete article. Equivalent transistors can be used.
We found this circuit in a 1965 General Electric manual. The components are from the period. Time...
This 1-transistor Hartley oscillator generates an audio signal that is dependent on capacitor C1....
This remote control or light-beam operated switch was found in the June 1970 Radio Electronics magazine....