We found this circuit in a Radio Electronics from October 1963. The circuit uses an output transformer with a center tap. The trimpot is adjusted for higher gain and lower quiescent current.
The presented project is simple, but efficient in medium distance irrigation. In this circuit, the time...
This high quality circuit with complementary symmetry was found in an Electronics World of 1966....
We found this circuit in the 1989 Radio Electronics Experimenter. The circuit uses common...