This circuit was found in documentation from the 1980s. The integrated circuit is from the time and the voltage depends on the desired power, and the component's datasheet should be consulted.
This circuit, which operates between 7 and 30 MHz, was found in Radio Electronics from the 1980s....
This circuit was found in an old American magazine for radio amateurs. The circuit is based on a...
This low current circuit allows the regulation of voltages in the range of 0.5 to 30 V. We find it...