Found in an EDN from the 90s, this circuit has a distortion of only 0.003%. Capacitors and double potentiometer determine the frequency.
This high voltage power supply for gas laser tubes was found in the Radio Electronics magazine special...
I found this circuit on a December 1976 Radio Elettronica. The Italian magazine no longer exists, but...
This circuit was found in the April 1984 issue of Radio Electronics magazine. The circuit directly...