This circuit with output powers of 2 to 3 W depending on the power supply was found in the magazine Radio Electronics of April 1990. The speakers are 8-ohm.
This power control was found in a 1968 power circuit manual. The SCRs are according to the power of...
This positive pulse extender or stretcher was found in a Popular Electronics from the 90s. The...
Found in a 1993 Electronics Hobbyst Handbook, this passive circuit can be used with common...