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.
Using an operational amplifier, this circuit was found in the March 1996 issue of Electronics Now...
Only when the programmed key sequence is activated, and within a minimum time determined by the...
Found in a 1980s documentation, this circuit makes use of components from that time. Modern...