This circuit is from an old American publication, using transistors of the time and operating with a 48 V power source. The load is 2.2 ohm, and the transistors must be replaced by modern equivalents.
We found this circuit in an Electronics Now since 1994. With it we can control a triac with a very...
An application for the previous circuit (CB109) is shown here. The central frequency is determined by C and...
General Electric suggests this circuit in a 1980s documentation. The operational of the time is...