This circuit, which can be used as a shield, was found in General Electric documentation from the 1980s. The coupler uses a photo-SCR. The circuit admits equivalent components.
This transmitter emits signals in the FM range, reaching a few meters away. The modulation...
This audio amplifier has an internal DC volume control with logarithmic characteristics and a...
This configuration found in GE documentation from the 90s, can also be seen elsewhere in this...