This circuit is from a Radio Electronics from April 1964. The circuit uses power transistors of the time, which must be mounted on a good heat radiator. Modern equivalents can be used.
This is another one of the many versions of this circuit that we have in this section. We found it in...
This circuit of a publication from the 70's uses a different type of power that we had already...
This circuit was obtained in a magazine for radio amateurs 73 of the 90s. The circuit is based on...