Featured in the February 1949 Radio Electronics magazine, this benchtop instrument generates multi-range audio signals. The circuit has 6 tubes including the rectifier.
This circuit, found in a 1985 documentation, causes two incandescent lamps to flash alternately. The...
This circuit from the 90s, found in an Electronic Engineering can be used as a shield since its...
jkjjjjj Used to measure night light for the purpose of adjusting camera exposure time, this...