Using the LM383 this circuit was found in a Popular Electronics from the 90s. The source must be 14V and the integrated circuits must have good heat sinks.
This circuit is from an American publication from the 60's. The power is on the order of 600 mW....
This circuit was found in a Philips documentation from 1967. The circuit uses components from the...
Using a 709 integrated circuit this circuit was found in the June 1972 issue of Radio Electronics...