This circuit is from Electronics Now magazine, February 1987. The number of channels is high depending only on the distances of the stations and the losses in the cables.
With changes, this circuit from a documentation of the 70s, can be adapted to use more modern...
Found in a 1968 EEE, this switch controls a high-power load from an audio signal. The current is...
In this circuit the gain decreases as the input signal intensity increases. The circuit is from a...