This circuit is from 2005 documentation. The integrated amplifier circuit must be mounted on a good heat sink and the speaker must be able to withstand the full power of the circuit.
Here we show a configuration in which we have a control voltage applied from a voltage divider, which...
This different power control circuit with SCR was obtained from a 1967 magazine. The SCR can be...
The circuit that gave rise to this configuration was found in a magazine of the 1980s with the...