This power supply for model railroad was found in a February 1961 Radio Electronics Magazine. The transistor must be mounted on a heatsink and the transformer is a 1,5A secondary winding.
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...