This simple source uses two 2N3055 transistors that must be equipped with good heat sinks. The source has no protection, only an input fuse. The diodes are for 5 A x 50 V or more.
This circuit can drive a loudspeaker with near 1 W of Power from 6 to 9 V supplies. The circuit...
This “one channel” demonstration circuit was found in the April 1979 issue of Radio Electronics magazine....
This circuit is from an August 1984 Radio Electronics magazine. It monitors the state of a RAM...