This circuit was found in a 1965 General Electric documentation. SCRs and unijunction may be current equivalents. The circuit has period adjustment and symmetry.
This circuit was found in an old documentation and can be implemented with BC549 transistors. The...
This mid-waveband receiver was found in a book on transistors from 1954. The antenna coil is of...
Old multimeters used a 22.5 V battery for high resistance measurements. If you have one, you...