This circuit was found in a 1945 publication. The circuit was stated to be part of a walk talkie. Note that, as it is a portable assembly, it was powered by batteries. The jack was for microphone insertion.
Found in a 1967 EEE, this circuit oscillates at 20 MHz according to the values of the given...
In the figure we have an amplifier step configuration with a transistor suggested by a 1985...
This constant current circuit was found in the October 1993 Electronics Now magazine. The current can...