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 circuit was found in Motorola's 1968 documentation. It can be built on current equivalent...
Many still like to hear medium waves but live in places with difficult reception with many...
The original frequency of the Pierce Oscillator with bipolar transistor is given by the crystal, which...