Found in American documentation from the 90s, this circuit uses a GASFET of the time. The circuit is critical.
This inverter circuit, which consists of a Hartley power oscillator, was found in a 1993...
This circuit is from a Radio Electronics from August 1964. The transistor is from the time, but...
The diodes of this circuit are general-purpose, and the base resistors are typically between 2k2...