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Topic: Mediumwave

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AM broadcast radio

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Very low frequency

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	Mediumwave - Wikipedia, the free encyclopedia
		In the Americas, mediumwave stations are separated by 10 kHz and have two sidebands of ±5 kHz.
		Mediumwave signals have the property of following the curvature of the earth (the groundwave) at all times, and also reflecting off the ionosphere at night (skywave).
		The mediumwave transmitter at Berlin-Britz for transmitting RIAS used a cross dipole mounted on five 30.5 metre high guyed masts to transmit the skywave up to the ionosphere at nighttime.
	en.wikipedia.org /wiki/Mediumwave (950 words)

	Mediumwave
		Mediumwave radio broadcasts are those between the frequencies of 500 kHz and 2000 kHz.
		Mediumwave signals have the properties of following the curvature of the earth (the groundwave[?]) and reflecting or refracting off the ionosphere at night (skywave).
		In the Americas, mediumwave stations are separated by 10 kHz and have two sidebands of +/- 5 kHz.
	www.ebroadcast.com.au /lookup/encyclopedia/me/Mediumwave.html (224 words)

	Mediumwave transmitter Bremen - Wikipedia, the free encyclopedia
		The mediumwave transmitter Bremen is a facility for medium wave broadcasting.
		The mediumwave transmitter Bremen uses as aerial a cage aerial, which is mounted on a 45 metre high guyed grounded steel framework mast.
		This aerial has a high gain of 4.5dB, which means that the 50 kilowatt transmitter brings the same effiency as a 140 kilowatt transmitter.
	en.wikipedia.org /wiki/Mediumwave_transmitter_Bremen (151 words)

	Notes on Medium Wave Propagation -- on hard-core-dx.com
		When the geometry is just right, the mediumwave frequency transmitted signal can literally propagate underneath and through the auroral oval zones into the polar ionosphere which is less disturbed and from the polar ionosphere back into the middle latitude ionosphere, without ever coming in contact with the highly absorptive auroral ionosphere.
		Unfortunately mediumwave frequencies fall within the electron gyrofrequency which is in the approximate range of 630 to 1630 kHz and of course the AM broadcast band and 160 meter band is very close to these electron gyrofrequencies.
		The closer a transmitted a mediumwave carrier wave frequency is to the electron gyrofrequency, the more energy that is absorbed by the gyro electrons from that carrier wave frequency.
	www.hard-core-dx.com /solar/solarmw.html (2099 words)

	NationMaster - Encyclopedia: Mediumwave (Site not responding. Last check: 2007-11-07)
		AM stereo is any of a number of mutually-incompatible techniques for broadcasting two_channel audio in the mediumwave band in a manner that is compatible with receivers designed for standard amplitude modulation.
		Radio frequency, or RF, refers to that portion of the electromagnetic spectrum in which electromagnetic waves can be generated by alternating current fed to an antenna.
		Mediumwave radio transmissions (sometimes called Medium frequency or MF) are those between the frequencies of 300 kHz and 3000 kHz.
	www.nationmaster.com /encyclopedia/Mediumwave (2562 words)

	Mediumwave (Site not responding. Last check: 2007-11-07)
		Many stations are required to shut down or reduce power at night in order to make way for clear channel stations that can then be received over a wider range.
		In the Americas, mediumwave stations are separated by 10 kHz and have two sidebands of ±5 kHz.
		For most of the 20th century, the radio frequency 500 kHz was reserved world wide as the Morse code international calling and distress frequency for ships on the high seas.
	mediumwave.area51.ipupdater.com (679 words)

	Kiwa's Published Reviews
		Mediumwave loops were common in radios before the discovery that ferrite material would concentrate radio signals and thus reduce the antenna to a small rod inside most transistor radios.
		By carefully rotating the loop of wire, many listeners were able to reduce the level of jamming interference to a point where the resistance message was at least intelligible.
		This bandwidth control is extremely useful if you have several strong local mediumwave stations in the neighbourhood and you want to try and pick up stations on adjacent channels.
	kiwa.com /wrth.html (1006 words)

	AM/FM DXing
		For mediumwave, the single most important factor for good DX is the time of day.
		Mediumwave signals almost always get absorbed by the D Layer of the ionosphere during daylight hours.
		Whereas the mediumwave band can be counted on to provide distant reception with much dependability, this is not the case at all on the VHF-FM band.
	www.ehiggins.com /amfmfaq (4206 words)

	dxers guide: Radio Backgrounds in Afghanistan - Part 1,2 and 3 (Site not responding. Last check: 2007-11-07)
		mediumwave transmitter was installed at a new location considerably closer to Kabul, though I have never heard it, even when visiting in nearby areas.
		Because of the difficulties encountered in establishing a network of local mediumwave stations thoughout Afghanistan, instead a regional service in local languages was on the air for several years using two transmitters in the tropical shortwave bands.
		This huge mediumwave unit, variously described as 100 kw, 50 kw and 25 kw, was installed inside a series of cages on the top floor of this new building.
	dxersguide.blogspot.com /2005/07/radio-backgrounds-in-afghanistan-part.html (2243 words)

	Wavescan 408
		The first mediumwave station in Ireland was launched in Belfast, Northern Ireland, in October 1924 under the auspices of the BBC London.
		This new station was given the callsign 2BE and it was on the air with 1.5 kw on the wavelength 440 metres, corresponding to 680 kHz.
		During the European Conflict, several of the mediumwave stations in Ireland were synchronised on one channel so that they could not be used as radio beacons for invading aircraft and ships.
	www181.pair.com /otsw/Wavescan/wavescan408.html (1363 words)

	80 Years of Seventh Day Adventist Broadcasting
		The first mediumwave broadcast from the Adventist denomination in Europe went on the air from Radio Luxembourg in 1947, with the broadcast of the "Voice of Prophecy" over their large 150 kW transmitter on 232 meters, 1293 kHz.
		However, in January 1979, the mediumwave broadcasts from Radio Luxembourg were taken over officially as part of the international radio ministry of Adventist World Radio.
		The Gibraltar Broadcasting Company operates a 2 kW mediumwave station on 1458 kHz, and this facility carried a series of test broadcasts on behalf of Adventist World Radio with again, nearby areas of North Africa as the designated coverage area.
	radiodx.com /spdxr/awr_80th.htm (937 words)

	[No title]
		Mediumwave broadcasts of RTE 2fm in Dublin ceased in January.
		The closure of the Athlone mediumwave transmitter that carries RTE 2fm is of particular significance.
		For mediumwave, the antenna is 1/4 wave and shortwave antenna is the 5/8.
	www.worldofradio.com /dxld4042.txt (12686 words)

	IRRS-GRM in Milano
		There are obvious advantages in receiving FM vs. Mediumwave or Shortwave in terms of audio fidelity.
		Mediumwave, although lacking in fidelity, provides a much wider coverage than FM due to the lack of co-channel interference, and it is often used for example to tune into the news service offered by RAI.
		It must be noted that Italy has been pioneering private FM broadcasting since as early as 1975, when, in addition to the already established three national state owned RAI channels (also on AM/Medium Wave) a number of small and aggressive FM stations went on the air.
	www.nexus.org /NEXUS-IBA/FM/FM-in-Milano.html (1030 words)

	Mediumwave
		Mediumwave radio transmissions (sometimes called Medium frequency or MF) are those between the frequencies of 300 kHz and 3000 kHz.
		In most of the world, mediumwave serves as the most common band for...
		Visit the page for the relevant province to find a list of all FM and mediumwave radio stations, with details of frequencies, powers, transmitter locations, addresses and phone and fax numbers.
	www.logicjungle.com /wiki/Mediumwave (321 words)

	Mediumwave (Site not responding. Last check: 2007-11-07)
		In most of the mediumwave serves as the most common band broadcasting.
		The standard AM broadcast band is 535kHz to 1705kHz North America but remains only up to 1615kHz
		In the United States in September 2002 the Federal Communications Commission approved the iBiquity in-band on-channel (IBOC) system of digital broadcasting which meant to improve the audio quality of The Digital Radio Mondiale (DRM) IBOC system has been approved the ITU for use outside the Americas.
	www.freeglossary.com /Mw (227 words)

	Welcome to rec.radio.shortwave (AM/FM DXing)
		The mediumwave (commonly referred to as AM) broadcast band currently extends from 525 to 1605 kilohertz.
		Unfortunately, these two antennas do not have very long ferrite elements; and reviews of their performance in the mediumwave press tends to be mixed.
		For mediumwave, North American frequencies fall into three basic classes: * CLEAR CHANNEL: These frequencies are 540, 640-780, 800-900, 940, 990-1140, 1160-1220, and 1500-1580 kHz.
	www.faqs.org /faqs/radio/monitoring/am-fm-dxing (3766 words)

	International Radio Broadcasters
		Bayrak Radio Television - The Turkish Republic of Northern Cyprus broadcasts on mediumwave, shortwave, FM, TV, and satellite frequencies.
		Radio Kuwait - Mediumwave, satellite and shortwave schedules and programming information of broadcasts to all world regions in Arabic and English.
		Radiodiffusion Télévision Sénégalaise - RTS transmits local programs on mediumwave, FM and television, and international and national broadcasts via shortwave.
	www.ability.org.uk /international_radio_broadcasters.html (2217 words)

	Radio Heritage Foundation - Archive Top Ten: The Voice of Australia
		On this occasion, the 5 kW mediumwave transmitter for 2FC was re-tuned also to a shortwave channel for a parallel relay.
		After the mediumwave station 3LO signed off at the end of the broadcast day on September 7, 1927, the shortwave transmitter was fired up for the inaugural live broadcast from the 3LO studios in downtown Melbourne.
		Shortwave broadcasting from 3LO ended in 1929 when the two mediumwave stations in Melbourne, 3LO and 3AR, were amalgamated and ultimately taken over by the government for incorporation into the nationwide network of the Australian Broadcasting Commission.
	www.radioheritage.net /Story2.asp (1446 words)

	Geschiedenis van het station PH4S
		It was in the same years that I discovered the pirate stations Radio Veronica and Radio Noordzee Internationaal on the mediumwave.
		When I was 12 years old I got from my uncle Geert an old tube receiver on which I could receive the mediumwave and the shortwave.
		Later when I bought a receiver for the shortwave, mediumwave and fm band I started to listen to pirate stations on the fm broadcasting band.
	home.tiscali.nl /~jsmedesjr/his-eng.htm (1207 words)

	Introduction to Medium and Shortwave DXing (Site not responding. Last check: 2007-11-07)
		DX refers to listening to distant signals and many who follow this hobby find it challenging, exciting, and rewarding.
		In this section we will give you listening tips, how to find the rare ones, and how to submit reception reports and receive QSL cards from stations you have heard.
		This section is all about Mediumwave, also known as AM Broadcast Band, DXing.
	www.odxa.on.ca /beginnersguide/opening.html (242 words)

	IBS Receiver News \| Updates to Passport to World Band Radio (Site not responding. Last check: 2007-11-07)
		Unlike the ‘1103, the E5 scans mediumwave AM in correct steps: 10 kHz, or 9 kHz outside the Americas.
		Another sign of possible AGC limitation is that with some whopping signals – local mediumwave AM or 49 meters at night with an outboard antenna – audio weakens unless the attenuator is switched in.
		Mediumwave AM DXing is aided by the dual bandwidths.
	www.passband.com /pages/receivernews.htm (2510 words)

	Media Network Weblog: 25 July 2004 (Site not responding. Last check: 2007-11-07)
		The date and time have been announced for the removal of one of the mediumwave masts at Lopik, in accordance with the agreement signed a few weeks ago.
		The simulcast of the mediumwave service on 1395 kHz has now ended, and is currently replaced by a loop advising listeners to retune to 1008 kHz.
		According to this, 100 kW mediumwave transmitters are to be installed at Lahore, Mirpur, Peshawar, Quetta and Turbat.
	medianetwork.blogspot.com /2004_07_25_medianetwork_archive.html (6116 words)

	[No title]
		At that time, the domestic service on mediumwave 657 kHz was broadcasting a speech by a pro-Taleban cleric condemning US attacks against Afghanistan.
		It is usually on the air from 1530- 1710 gmt on 1107 kHz mediumwave and 7085 kHz (variable) shortwave with short broadcasts in English, Arabic, Turkmen, Uzbek, Urdu and Russian.
		Forty minutes before reception of the domestic and external services was lost, the Kabul radio broadcast in English on 8 October at 1530 gmt, contained a report that Taleban commanders in Kabul Province would "fight until their last drop of blood against the United States and other invaders".
	www.angelfire.com /ok/worldofradio/dxld1146.txt (10951 words)

	Radio Heritage Foundation - Column: Reminiscing with a Radio (Site not responding. Last check: 2007-11-07)
		At the time, I was a student at a theological college, inland from the coast, between Sydney the state capital and the large regional city Newcastle.
		Some ten years earlier I had learned the delights of radio listening, mediumwave and shortwave, from my uncle Max Mudie whose DX reports were often quoted in the radio magazines "down under" during that era.
		On mediumwave, it was quite easy to hear most of the broadcasting stations in eastern Australia and many of the broadcasting stations across the Tasman in New Zealand.
	www.radioheritage.net /Column1.asp (900 words)

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