This circuit was found in a Modern Transistor Workbook from 1965. The circuit sends signals from a small record player to a medium-wave radio placed nearby.
This circuit with 1% regulation aims at replacing mercury cells. We found it in a 1967...
This transistor tester configuration can be found on this website with many variations. The...
This high current control circuit was found in a publication from the 1990s. The power transistor must...