This circuit with the PA7601 was found in a 1967 Philco-Ford documentation. The circuit has a pass band from 45 to 120 MHz.
This fuzz distortion circuit was found in old RCA documentation. Equivalent transistors may be...
This circuit for the two-meter band of radio amateurs was found in 1980s documentation....
This circuit was obtained from an American publication of the 80's. The integrated circuit is of the...