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 can be used with motors or resistive loads, such as heaters and incandescent lamps....
This circuit was found in an English technical documentation from 1973. The circuit generates...
This light intensity meter is from a 1978 Texas Instruments optoelectronics manual. The...