This nice function generator circuit with the XR2206 was found in the May 1977 Radio Electronics magazine. The circuit has a transistor output stage.
Found in Popular Electronics from the 90s, this circuit uses a 2N2646 and a general-purpose transistor...
The crystal frequency of this circuit found in an American documentation is limited only by the...
These two circuits were found in Radio Electronics magazine from February 1960. The transistor is a power...