Long Wave

Long Wave

In radio, longwave refers to parts of the radio spectrum with relatively long wavelengths. The term is a historic one dating from the early 20th century, when the radio spectrum was considered to consist of long, medium and short wavelengths. Most modern radio systems and devices use wavelengths which would then have been considered 'ultra-short'.

In contemporary usage, the term longwave is not defined precisely and its meaning varies across the world. The most common definition is the radio band with wavelengths greater than 1000 meters (frequencies less than 300 kHz), which would include the ITUs low frequency (LF) (30–300 kHz) and very low frequency (VLF) (3–30 kHz) bands, but sometimes part of the medium frequency (MF) band (300–3000 kHz) is included. In all cases it includes the entire LF band.

In the US, the Longwave Club of America is interested in "frequencies below the AM broadcast band", i.e., all frequencies below 535 kHz. (Lower frequencies correspond to longer wavelengths.)

In Europe, Africa and large parts of Asia (ITU Region 1), where a range of frequencies between 148.5 and 283.5 kHz is used for AM broadcasting (in addition to the medium wave band), the term longwave usually refers specifically to this broadcasting band.

The Region 1 longwave broadcast band falls wholly within the low frequency band of the radio spectrum (30–300 kHz); broader definitions of longwave may extend below and/or above it.

Read more about Long Wave:  Broadcasting

Other articles related to "long wave, long, wave":

Media In Cornwall - Radio - Background
... years before the BBC National Programme was audible in Cornwall, from the then new long wave transmitter at Daventry, although BBC transmissions began in 1922 ... The transmission, coming a long way from Cornwall, (from the centre of the English Midlands), was crackly and barely audible at night-time, and it was a solitary ... and South Wales, but the reception of this medium wave transmitter in Cornwall was generally poor, effectively blocked by Dartmoor and in the west of the county by ...
Burghead Transmitting Station
... near Burghead (grid reference NJ125685) in Scotland for long wave and medium wave radio transmission that started service on 12 October 1936 ... The site is owned by Arqiva and houses a long wave radio transmitter on 198 kHz broadcasting BBC Radio 4 and two medium wave radio transmitters, broadcasting BBC Radio 5 Live ... The long wave transmitter is part of a network transmitting on the same frequency, the other transmitters being at the Droitwich and Westerglen ...
AM Radio - Broadcast Frequency Bands
... Long wave is 153–279 kHz, with 9 kHz channel spacing generally used ... Long wave is only used for radio broadcasting in ITU region 1 (Europe, Africa, and parts of Asia), and is not allocated elsewhere ... Due to the propagation characteristics of long wave signals, the frequencies are used most effectively in latitudes north of 50° ...
Radio Luxembourg (English) - Second Commercial Era - 1946–1953
... commercial radio station using the European long-wave band, once more under the management of Stephen Williams ... of advertising available in English, the early morning shows on long wave quickly disappeared and made way for French-language programmes ... initially some of the English-language programmes continued via Radio Luxembourg I on long wave, a second but less powerful wavelength was opened up as Radio Luxembourg II on medium wave ...
R. L. Drake Company - Amateur Radio Products - Long Wave, Medium Wave, and High Frequency (HF) Equipment
... For short wave listeners, Drake produced the SW-4 receiver in 1967 (and later the SW-4A), which matched the rest of the 4-Line in appearance, was based on the R-4 ... It covered a greater portion of the high frequency (HF) and medium wave spectrum than did the SW-4, by using a large set of selectable heterodyne oscillator crystals for selecting the ... The receiver, which primarily covered medium and short wave bands, could be expanded to cover two VHF ranges with an optional, internal adapter ...

Famous quotes containing the words wave and/or long:

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