The ability to control large currents with small control power made magnetic amplifiers useful for control of lighting circuits, for stage lighting and for advertising signs.
22.
Magnetic amplifiers can be used for measuring high DC-voltages without direct connection to the high voltage and are therefore still used in the HVDC-technique.
23.
The magnetic amplifiers required powerful pulses of heavy current produced by a transmitter-type vacuum-tube, of a type still used in amateur radio final amplifiers.
24.
The typical magnetic amplifier consists of two physically separate but similar transformer magnetic cores, each of which has two windings : a control winding and an AC winding.
25.
In 1961, ADC merged with Magnetic Controls Company, a manufacturer of power supplies and magnetic amplifiers with strong ties to the U . S . space program.
26.
Magnetic amplifiers are devices somewhat similar to a transformer where one winding is used to control the saturation of a magnetic core and hence alter the impedance of the other winding.
27.
This was Univac's first computer designed with transistors and was used to test transistor logic circuits and also its speed and reliability, compared to magnetic amplifier ( MAGSTEC ) and vacuum tube circuit computers.
28.
The output signal, proportional to the ampere turns in the control current bus bar, is derived from the alternating excitation voltage of the magnetic amplifier, there is no voltage created or induced on the bus bar.
29.
It was one of the first computers to be ( nearly ) entirely solid-state, using 700 transistors, and 3000 magnetic amplifiers ( FERRACTOR ) for primary logic, and 20 vacuum tubes largely for power control.
30.
One member of the lab, Ken Johnson, proposed a new type of transistor-based logic that followed the same conventions as the magnetic amplifiers, namely that binary logic was based on known currents instead of voltages.
