This circuit is from a 1968 Electronic Design. The characteristics of the output transformer are not given and the transistors are of the time. The circuit provides a power of a few watts.
This circuit is from an Electronics Now from August 1995. The triac is according to the load that...
Although it was found in a British magazine 1976, this circuit can be easily upgraded with the...
This circuit was found in the January 1992 issue of Radio Electronics magazine. The capacitor...