This circuit is from a 1980s Motorola documentation. The circuit can be made with modern equivalent components. The original circuit is for the 115 Vac (110 V) grid and has two settings.
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...