This circuit is from a Radio Electronics magazine from May 1986. Observe the voltages applied to the capacitors, taking care that the capacitor under test can withstand them.
The integrated circuit used in this application is not currently common. The circuit is from 80s...
This circuit was obtained in an Electronic Design from the 90s. The circuit uses transistors from the...
This circuit hás a Power output of more than 1 W. It is used in small experimental or low power...