This is the version of the previous circuit for vehicles with positive ground. The circuit is from a Radio Electronics from December 1976. A siren is included.
This 50 W amplifier was found in the November 1983 Radio Electronics issue. The circuit is...
This sophisticated circuit was found in the November 1978 issue of Radio Electronics magazine. Based on...
This circuit is from Radio Electronics from March 1985. The circuit uses common components at the...