This circuit was found in a 1965 Radio Shack documentation. The transistors are from that time. The circuit can be implemented with current transistors and lower voltage supply.
This circuit, in addition to providing an output that corresponds to the absolute value of the...
This modern XTAL radio replaces the galena crystal for a germanium diode as the 1N34 or...
This transistor tester configuration can be found on this website with many variations. The...