Found in a 1967 Delco documentation, this circuit can deliver power from 40 to 50 W at 8-ohm load. The response ranges from 20 to 20 000 Hz. No information is given about the transformer used.
Found in a 1964 Electronic Design, this circuit shows how to modulate a signal with a dynamic low...
This circuit was found in a 1971s English magazine. We can still assemble it using BC548...
This circuit was obtained in a Popular Electronics of the 90s. The circuit uses integrated from...