The purpose of this circuit is to convert a short-lived pulse into a negative rectangular pulse. The circuit uses a unijunction that can be replaced by an equivalent such as 2N2646.
This MW bedside radio was found in an English documentation from 1989. It is based on a dedicated...
This timer, using the ZN1034E, is from a May 1987 Radio Electronics magazine. The circuit can...
This receiver using a FET appeared in a November 1957 Radio Electronics magazine. It is one of the...