This commercial receiver from the year 1958 uses two AA cells as Power supply. The circuit is intend to receive MW station and the transistors are germanium types not easy to find today.
Fluorescent lamps in the range from 4 to 40 W can be powered on from cells or batteries. The lamp...
We found this oscillator in an integrated circuit manual from the 90's. The circuit shows how to...
This circuit was found in a 1970s documentation. The components are from that time, and...