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W.
See: Watt.
WA.
CW prosign for "word after".
WAC.
Worked All Continents. An amateur award award for having had confirmed contacts in all continents.
WARC.
World Administrative Radio Conference. Used to reference the WARC bands 10, 12 and 17 meters.
See also: WRC.
WAS.
Worked All States. An amateur award award for having had confirmed contacts in all US states.
Watt (W).
The unit of power in the metric system. The watt describes how fast a circuit uses electrical energy.
Wattmeter.
Also called a power meter, a test instrument used to measure the power output (in watts) of a transmitter. A directional wattmeter measures both forward and reflected power.
Wave Antenna.
See: Beverage Antenna.
Wavelength.
Often abbreviated l (lower case 'L') or λ (lambda). The distance a radio wave travels in one RF cycle. Wavelength is the length of a wave from one crest to the next usually measured in meters. In Radio usage this refers to the wavelength of the wave that acts as a carrier for the audio (the sound you can hear) signal. Wavelength can be calculated from the following formula: Wavelength=Velocity/Frequency
Where:
Frequency is the number of repetitions that a wave makes per second, measured in Hertz.
Velocity is the speed of the wave, radio waves travel at the speed of light - 300,000,000 meters/second
Wavelength is the length of a wave from crest to crest, measured in meters
WAZ.
Worked All Zones award. An amateur award award for having had confirmed contacts in all ITU zones.
WB.
1. Wideband. Reference to the badwidth of the transmitted signal.
2. CW prosign for "word before".
WBFM.
See: Wideband FM.
WFM.
See: Wideband FM.
White Noise.
Broad Spectrum Noise, that is to say the hiss and crackle that can be heard on a receiver when not tuned to a station.
WIA.
Wireless Institute of Australia, a national amateur radio organization in Australia.
Wideband FM (WBFM / WFM).
An FM transmission mode. The deviation from the center frequency is +/-75kHz and is used by FM broadcast stations for high-fidelity sound.
WIRES.
Wide-Coverage Internet Repeater Enhancement System (Yaesu internet connection protocol).
WPM.
WRC.
World Radiomommunication Conference. Organised by ITU to review, and, if necessary, revise the Radio Regulations, the international treaty governing the use of the radio-frequency spectrum. It is held every two to four years. Prior to 1993 it was called the World Administrative Radio Conference (WARC).
WRU.
Who Are You? (used in RTTY).
WT.
1. Walkie-Talkie or hand held radio.
2. Wireless Telegraphy (Morse or RTTY).
WVDC.
Working Voltage, DC. Used on certain capacitors to denote the maximum DC voltage that should be applied to the component.
WX.
Shorthand for Weather.