This circuit was obtained from a General Electric publication from the 1960s. The transistors are from the time and the circuit produces a 1 kHz signal with 1 V input.
The presented circuit emits signals in the FM band, which can be picked up from a distance of a...
I found this circuit in a documentation for radio amateurs from 1975. The FET could be the BF245....
The traditional inverter amplifier configuration with the operational 741 shown in the figure is...