Found in a 1964 Electronic Design, this circuit generates pulses based on an avalanche diode of the time. The circuit can be tested with modern equivalent components.
This circuit for the 1750 m band was published in the September 1989 Radio Electronics magazine. The...
This CMOS circuit was found in the July 1990 Radio Electronics magazine. Power is for a 12V...
The circuit shown in the figure generates a rectangular signal whose frequency depends on C1. For...