Using transistors at the time, this circuit was found in a 1967 Ferranti documentation. The circuit is for 150-ohm transmission lines.
This sensitive electroscope uses a MOSFET 3N128 and can detect electrostatic charges of objects....
This circuit was found in a 1968s European documentation. It is a current regulator using...
This small telegraph transmitter has a range of a few meters, operating at a frequency that...