18WuD2x

Kraus antenna • kWh 395
+−
A
RFC1
RFC2
RFC3
RFC4
V 1
V 2
C1
C2
Plate wire
Cathode wire
B+
Cathode wire
Plate wire
Kozanowski oscillator
C−
RFC5
Kraus antenna A bidirectional, flat-top beam antenna
consisting of a pair of closely spaced
dipoles. Several such sections can be connected
in series by crisscrossing the wires at voltage
loops.
krd Abbreviation of KILORUTHERFORD.
Kryptol A mixture of clay, graphite, and silicon
carbide. It is used in electric heater elements because
of its low resistance and high melting
point.
krypton Symbol, Kr. An inert, gaseous element.
Atomic number, 36. Atomic weight, 83.80. Kryp-
ton is present in trace amounts in the earth’s atmosphere.
K scan In radar operations, a modified A-scan
used in aiming antennas in which two pips are
displayed; their relative amplitudes indicate the
antenna-aiming error.
K series A series of spectral lines for the shortest
wavelengths of radiation from the innermost electron
shell of a radiating atom.
KSR Abbreviation of keyboard send-receive unit.
Ku band A band of microwave frequencies between
approximately 12 and 18 GHz.
Kundt’s law The index of refraction of a medium
does not change continuously with wavelength in
the absorption bands.
Kundt tube A device used to measure the speed of
sound in gases under various conditions. Suspended
particles in the gas form standing waves
that can be easily seen. Knowing the frequency of
the disturbance and the distance between nodes
of the standing waves, the speed can be determined.
The pressure and density of the gas, as
well as temperature and humidity, affect the
speed.
kurchatovium See RUTHERFORDIUM.
kV Abbreviation of KILOVOLT.
kVA Abbreviation of KILOVOLT-AMPERE.
kVAR Abbreviation of REACTIVE KILOVOLT-
AMPERE.
kVARh Abbreviation of KILOVAR-HOUR.
kW Abbreviation of KILOWATT.
kWh Abbreviation of KILOWATT-HOUR.