The original purpose of this circuit, which we find in old American documentation, is to modulate an RF carrier for telecommunications applications. Transistors support equivalents.
This circuit uses a double MOSFET, a component not very easy to obtain today. The circuit is from...
This solar oscillator that works as a frequency standard was found in Radio Electronics magazine from...
This low-current power supply was found in the April 1973 issue of Radio Electronics magazine. The circuit...