This DC-DC converter was found in old RCA documentation. The circuit operates at 15 kHz. The characteristics of the transformers were not indicated.
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...