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Topic: AM radio

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Mediumwave

FM radio

Radio

Shortwave

History of radio

Digital audio broadcasting

List of radio stations

Amplitude modulation

Digital radio

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Radio frequency

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In the News (Wed 7 Jan 09)

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	AM Query -- AM Radio Technical Information -- Audio Division (FCC) USA
		Please refer any comments or suggestions on the AM Query to Dale Bickel, dale.bickel@fcc.gov.
		Only AM records with current engineering data will be retrieved.
		AM List provides faster response for larger inquiries.
	www.fcc.gov /mb/audio/amq.html (440 words)

	Broadcast Signals
		Radio communication is typically in the form of AM radio or FM Radio transmissions.
		When information is broadcast from an AM radio station, the electrical image of the sound (taken from a microphone or other program source) is used to modulate the amplitude of the carrier wave transmitted from the broadcast antenna of the radio station.
		This is in contrast to AM radio where the signal is used to modulate the amplitude of the carrier.
	hyperphysics.phy-astr.gsu.edu /hbase/audio/bcast.html (612 words)

	Howstuffworks "How the Radio Spectrum Works"
		When you listen to a radio station and the announcer says, "You are listening to 91.5 FM WRKX The Rock!," what the announcer means is that you are listening to a radio station broadcasting an FM radio signal at a frequency of 91.5 megahertz, with FCC-assigned call letters of WRKX.
		In the same way, AM radio is confined to a band from 535 kilohertz to 1,700 kilohertz (kilo meaning "thousands," so 535,000 to 1,700,000 cycles per second).
		The first radio broadcasts occurred in 1906 or so, and frequency allocation for AM radio occurred during the 1920s (The predecessor to the FCC was established by Congress in 1927.).
	www.howstuffworks.com /radio-spectrum.htm (668 words)

	Radio Islam´s Encyclopedia. Radio Islams Uppslagsverk.Ahmed Rami. Maroc. Morocco. Palestine.Jewish occupation. ...
		Radio Islam, was created as a reaction to today's realities in the Middle East in general, and the Palestinian tragedy specifically.
		In an interview the same day in Swedish radio and TV one of the leaders of the Jewish lobby declared that the result of the poll was the fruit of broadcasts for years from Radio Islam, and that only Ahmed Rami can be happy about it today.
		According to the bill, Radio Islam is requested to pay 6000 Swedish crowns for the costs of the broadcasting at a tariff of 65 crowns for a quarter of an hour (there is a common sender for all the stations).
	www.abbc2.com /encyclopedia/engl.htm (3056 words)

	Radio-Locator
		The coverage pattern for each AM station is based on the standard groundwave field strength pattern, the frequency of the station, and the ground conductivity of the local area.
		AM Antenna Patterns: AM radio stations with one tower transmit their signal with equal strength in all directions.
		AM stations that have more than one tower can precisely tune their antenna patterns to a very specific shape.
	www.radio-locator.com /cgi-bin/page?p=maps (947 words)

	AM radio receiver - Patent 6021322
		An AM radio receiver comprising a radio-frequency tuning circuit for selecting amplitude-modulated signal received at antenna; a local oscillator circuit for generating an oscillating signal which is used in a first frequency conversion section to convert receiving signal to an intermediate frequency signal having a higher frequency than that of the receiving signal, wherein:
		An AM radio receiver according to claim 1, wherein said voltage adjustment circuit comprises a first variable resistor connected between the reference voltage source and the ground, and a second variable resistor connected between said first variable resistor and said variable voltage source; and said local oscillator circuit is connected to said second variable resistor.
		Further, the AM radio receiver according to the present is designed such that the characteristic curves of the variable capacitance diodes of the local oscillator circuit are adjusted by means of the capacitance element connected in series with the oscillator coil of the local oscillator circuit.
	www.freepatentsonline.com /6021322.html (2489 words)

	Wave farewell to AM radio, say experts \| Uk News \| News \| Telegraph
		Radio broadcasts on medium wave will end within a few years if a powerful coalition of commercial radio interests has its way.
		While the BBC remains on the sidelines — the vast bulk of its weekly Radio Five Live audience of 5.7 million still listens on AM — leading figures in the commercial sector are determined to sound the death knell of medium wave.
		Capital Radio bosses have also been calling on the Government to set a date to switch off both AM and FM.
	www.telegraph.co.uk /news/main.jhtml?xml=/news/2006/12/30/nradio30.xml (417 words)

	Howstuffworks "How Radio Works"
		Even though radio waves are invisible and completely undetectable to humans, they have totally changed society.
		Whether we are talking about a cell phone, a baby monitor, a cordless phone or any one of the thousands of other wireless technologies, all of them use radio waves to communicate.
		Things like communication and navigation satellites would be impossible without radio waves, as would modern aviation -- an airplane depends on a dozen different radio systems.
	electronics.howstuffworks.com /radio.htm (227 words)

	The Encyclopedia of Radio Islam. Radio Islams Uppslagsverk.Ahmed Rami. Maroc. Morocco. Palestine. Jewish occupation. ...
		In Radio Islam's documents Zionism-FAO and Israel-FAO there are many revealing quotations from Ben-Gurion.
		In the spring of 1992 there were big headlines in swedish newspapers, when he visited the country, invited by Ahmed Rami, the founder of Radio Islam.
		Faurisson challenged the foremost adherents of the holocaust view to an open historical debate, live broadcast on TV or radio.
	www.radioislam.net /encyclopedia/english.html (4489 words)

	WR-1 Wood Radio Review -
		Fortunately, I am one of those people that have access to all of the newest radios, literally all of them produced.
		The radio that starts with a “B” and rhymes with “hose” another radio which is named after the Capital of Massachusetts and another small wooden radio that starts with a “T” and I can’t think of anything that rhymes with it.
		I compared it at same volume level to the other radios in the group and to my total (yes, I mean total surprise) the “B” radio was the first one to be turned off.
	www.radiolabs.com /Articles/woodradio.html (1083 words)

	Clear Channel AM Radio
		Tune across the AM band from your local sunset to your local sunrise you may be surprised at how well you can hear stations from hundreds and even thousands of miles away at night using an ordinary AM radio.
		In North America, AM stations are spaced on channels at 10 kHz intervals (540, 550, 560, etc.).
		Most AM stations are located from 540 to 1600, with new stations on the air in the 1610 to 1700 kHz range.
	www.ac6v.com /clearam.htm (1168 words)

	Australia's Vintage and Antique Radio Home :: Vintage Radio
		One of the few technologies around in 1922 that still survive today is AM radio broadcasting and for some odd reason all of the top-rating radio stations in Australia are not only broadcast on the AM band but were also broadcasting during the 1920's.
		It demonstrates that many collectors are very serious about their efforts to preserve valve radios and in many cases bringing damaged ones back to life and many of these restored sets look like they have just left the factory floor.
		Sydney radio station, 2CH, went to air on the 5th February in 1932 with a temporary 1000 watt transmitter manufactured in Germany by Telefunken, though this was soon replaced by an equivalent unit made by AWA, as they owned the station and had a significant transmitter manufacturing operation.
	vintage-radio.com.au (1473 words)

	AM Radio Reception
		I am not sure this is all that original, but maybe it is, and it helped with that TV downstairs I mentioned in the last suggestion.
		Here is a web page on Catholic radio stations nation wide,Catholic Radio in U.S. In this web page I have been discussing AM radio, which is the American term, internationally the term middle wave is used.
		Long wave radio uses the same techniques as AM radio even though it is on a different part of the radio spectrum.
	geocities.com /richleebruce/amradio.html (4624 words)

	KYOURadio - Open Source Radio
		Not exactly what you’ve come to expect from commercial radio.
		Well, perhaps your curious about the fuss but don't have the patience (or time) to search the web looking for something you might like.
		Welcome to Gameboyz Radio featuring the latest and hot...
	www.kyouradio.com (177 words)

	AM
		Tony Eastley presents AM Monday to Friday from 8:00am on ABC Local Radio and 7:10am on Radio National.
		AM is Australia's most informative morning current affairs.
		Rostropovich was a strong critic of Soviet power, and spent much of his career outside Russia in a self-imposed exile over his support for dissident writers, poets and musicians.
	www.abc.net.au /am (520 words)

	Radio Services - WXXI Online (Site not responding. Last check: 2007-11-07)
		The WXXI Public Broadcasting Council provides a number of distinct radio services -- AM 1370, Classical 91.5, 90.3 FM WJSL (Houghton), WRUR-FM 88.5 and Reachout Radio.
		AM 1370 and Classical 91.5 are also broadcast live over the Internet via wxxi.org.
		AM 1370 provides Rochester the best in-depth news, lively talk and rich local features like 1370 Connection.
	wxxi.org /about/radio.htm (150 words)

	Wired News: Is AM Radio Harmful?
		Equally important is that studies in the lab don't show how radio waves can produce cancers, she said.
		Debate continues over the health effects of radio waves from transmitters, both large and small, and other forms of electromagnetic fields, including power lines and microwaves.
		Meanwhile, the FDA and the World Health Organization are urging more studies, especially of radio waves from cell phones.
	www.wired.com /news/index/1,64579-0.html (502 words)

	Scitoys Message Board: My AM radio doesn't work as well as i need it to
		What I am trying to achieve is a physics project in which i'm supposed to send a message from one room to another.
		I only have 1 radio that will pick up the signal and I have to turn the volume all the way up on both of them in order to hear it.
		Am I wording this right, I still used the same colors in the same places.
	www.scitoys.com /board/messages/7/100.html?1139751990 (1008 words)

	EETimes.com - Digital AM radio format girds for attack on U.S. market
		DRM, a digital AM radio system that operates on broadcast bands below 30 MHz, is broadcast by more than 65 stations worldwide, though not in the United States, where Senger believes the battle over digital radio is far from over.
		That's where software-defined digital radio might be able to waltz in through the back door, making the battle over digital radio formats almost moot.
		Existing AM transmitters can be reused for DRM transmission: all it takes is a DRM exciter, which can be plugged in, holding broadcasters' investment to a minimum.
	www.eetimes.com /issue/fp/showArticle.jhtml?articleID=59301192 (1039 words)

	Moreno to Acquire Largest Spanish Language AM Radio Station \| Benton Foundation
		A partnership led by Arte Moreno, owner of the Los Angeles Angels, has agreed to purchase and assume the operations of Radio 830 KMXE, the nation's largest Spanish language AM radio station, from Radiovisa.
		Radio 830 KMXE currently produces and syndicates 24-hour programming, including Spanish language news, talk and sports.
		Under the new ownership, Radio 830 KMXE will serve as the flagship Hispanic radio broadcast outlet for Angels Baseball, staring with the 2006 season.
	www.benton.org /index.php?q=node/1390 (341 words)

	Zona Latina: Latin American Radio (Site not responding. Last check: 2007-11-07)
		Radio Prague Spanish-language radio broadcasts from the Czech Republic.
		Radio Horizonte (FM 88.1 Iquique, FM 102.1 La Serena, FM 98.1 Viña del Var, FM 103.3 Santiago, FM 89.4 Concepción, FM 94.3 Temuco, FM 100.3 Osorno, FM 92.9 Puerto Montt)
		Radio Polar (AM 960/FM 96.5 Punta Arenas / FM 98.5 Puerto Natales)
	www.zonalatina.com /Radio.htm (2470 words)

	The One AM Radio: A Name Writ in Water - PopMatters Music Review
		Hrishikesh Hirway, the man behind the One AM Radio is looking to join the flock of fellow home knob twiddlers with his sophomore release A Name Writ in Water.
		The One AM Radio has Hirway's voice pushed to the forefront of the mix, whereas the Postal Service caress Ben Gibbard's voice with electronic textures, never letting his vocals command the song.
		The One AM Radio's A Name Writ in Water is a sincere effort but instantly forgettable.
	www.popmatters.com /music/reviews/o/oneamradio-namewrit.shtml (704 words)

	Arizona AM Radio Station, - Inc. Article
		Outlook The halcyon days of AM radio have passed (FM currently gets three listeners to AM's one; 20 years ago it was the other way around), but businesses like this one can still represent an opportunity.
		After a decade in which buying radio stations was increasingly fashionable and increasingly expensive, the credit-tight, ad-poor '90s have cut the average price of an AM outlet almost in half -- to $600,000.
		Most AMs fetch six times earnings (FMs are closer to eight), but analysts say that any multiple above five might make it tough for the new owner of this operation -- a stand-alone in a mostly rural market -- to service the debt.
	www.inc.com /magazine/19911101/4968.html (352 words)

	Shane Media Services - Encyclopedia of Radio (Site not responding. Last check: 2007-11-07)
		Radio fans, electronic media scholars and researchers have a new tool to study the depth and breadth of the radio industry: the newly-released Museum of Broadcast Communications Encyclopedia of Radio.
		Pam wrote the entry “Car Talk,” the story of of the weekly National Public Radio program of the same name, hosted by brothers Tom and Ray Magliozzi from the studios of WBUR in Boston.
		Out just a few weeks, the Encyclopedia of Radio has already received a major literary award, named “Reference Work of the Year” by the American Library Association.
	www.shanemedia.com /article.asp?articleID=571 (345 words)

	A Chronology of AM Radio Broadcasting (1900-1960)
		Station 6XD was relicensed as radio station KZC on 360 meters December 9, 1921, and changed calls to KOG in February of 1922.
		He used radio the last five days of the campaign, from Oct. 27 to Nov. 2, 1922, and hired several halls in which loud speakers were placed.
		The AM broadcast band is opened (550-1350 kHz) (previously, stations generally operated on 360 meters or 400 meters); 550-1040 is designated for Class B stations, with 500-1000 watts; 1050-1350 is designated for Class A stations, with 5-500 watts.
	members.aol.com /jeff560/chrono1.html (14704 words)

	iB::Topic::Not quite amatuer radio.. mwbb aka am radio
		The tube AM car radios I grew up with had a lot of rf gain in them and used high Z input circuits and a siries capacitor called a trimmer that u tuned at 1400 kHz to match the antenna whip.
		The old AM car radios had a high impedance antenna input that is similar in operation as the active antennas you see today.
		Since FM took over the airways, good AM has gone the way of hetrodynes all over the band when the night-time power reductions were eliminated.
	www.qrz.com /ib-bin/ikonboard.cgi?s=3a22ab5445525fd643d8c88f2bb40ee1;act=ST;f=7;t=129127 (616 words)

	Boing Boing: Tom Jennings' car MP3 player made from gutted cheap-o AM radio
		This is the American Motors Corp. factory AM radio in its natural habitat.
		Not only is it a "shaft-type" radio, non-DIN, but it's very shallow; even cutting the center dash piece all to hell won't fit a modern stereo.
		If the radio is on, and there are stations, turning this knob far enough makes a sound.
	www.boingboing.net /2006/06/28/tom_jennings_car_mp3.html (355 words)

	NOAA Weather Radio
		NWR is a nationwide network of radio stations broadcasting continuous weather information directly from a nearby National Weather Service office.
		Working with the Federal Communication Commission's (FCC) Emergency Alert System, NWR is an "All Hazards" radio network, making it your single source for comprehensive weather and emergency information.
		NWR requires a special radio receiver or scanner capable of picking up the signal.
	www.nws.noaa.gov /nwr (336 words)

	Mailing List Archive: Radio tuner cards?
		I was wondering if anyone can recommend a radio tuner card that can pick up AM and FM stations.
		AM is very prone to noise, ever turn on
		don't try to listen to AM radio at home.
	www.gossamer-threads.com /lists/engine?do=post_view_printable;post=22787;list=mythtv (768 words)

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