With a 475 V supply, this amplifier published in Radio Electronics magazine in January 1958 offered good power. The amplifier used 4 tubes.
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...