Found in a QST magazine from the 90s, this circuit broadcasts on different amateur radio bands depending on the coil. Data for the coil and crystal are provided next to the diagram.
This circuit was found in a 1967 RCA SCR manual. It uses period components that can be replaced with...
This circuit for the power grid was found in the June 1969 Radio Electronics magazine. The load is...
This fuzz effect is from a 1988 Italian publication, but it can be easily assembled, as the...