This circuit comes from a 1966 NASA documentation. The circuit makes use of discrete components and is suitable for generate 455 kHz IF signals.
This circuit operates with frequencies from 0.5 to 400 MHz. We find it in a 90’s NASA...
This circuit was found in a 1968 EEE and can be implemented with any current general-purpose transistor....
This circuit was found in an old Poptronics but is still current as transistors can be replaced...