Electronics (Mike Jaroch)


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K

KEEP-ALIVE CURRENT

See KEEP-ALIVE VOLTAGE [18].

KEEP-ALIVE VOLTAGE

DC voltage applied to a tr gap electrode to produce a glow discharge that
allows the tube to ionize faster when the transmitter fires [18].


KEY CLICKS

Interference in the form of "clicks" or "thumps" caused by the sudden application or removal of power [12].


KEY-CLICK FILTERS

Filters used in keying systems to prevent key-click interference [12].

KEYED-OSCILLATOR TRANSMITTER

A transmitter in which one stage is used to produce the RF pulse [18].


KEYER

(1) A device that changes dc pulses to mark and space modulation for teletypewriter transmissions [17]. (2) A synchronizer [18].


KEYING RELAYS

Relays used in radio transmitters where the ordinary hand key cannot accommodate the plate current without excessive arcing [12].


KILO

A prefix meaning one thousand [1].

KINETIC ENERGY

Energy that a body possesses by virtue of its motion [1].

KIRCHHOFF'S LAWS

(1) The algebraic sum of the current flowing toward any point in a circuit and
the current flowing away from it is zero. (2) The algebraic sum of the products of the current and resistance in each of the conductors in any closed path in a network is equal to the algebraic sum of the electromotive forces in the path [1].


KLYSTRON POWER AMPLIFIER

A multicavity microwave electron tube that uses velocity modulation [18].


KNEE OF THE CURVE

The point of maximum curvature of a magnetization curve. (Shaped like the
knee of a leg that is bent.) [8]



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