This circuit is from an Electronics World of 1967. The described calculations can be applied to equivalent circuits with modern transistors.
This Texas Instruments circuit is from the 80's. However, it can be implemented with modern...
Found in 1969 RCA documentation, this dimmer uses a dual time constant setting to achieve better...
This is one of the channels of an amplifier suggested by Westinghouse in 1970s documentation. The circuit...