This oscillator produces a modulated signal using a unijunction transistor. We found it in an American documentation from 1965. The circuit modulates in frequency the generated signal.
This useful circuit is used to test the insulation of cables, appliances, leaks in high voltage...
This class B circuit was found in the 1960 Mullard transistor reference manual. Transformers are...
This circuit is from the American magazine that no longer exists Science & Electronics,...