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Topic: Radio transmitters

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	Lotek radio telemetry systems for fish and wildlife
		Radio telemetry involves the use of transmitters to emit the signals, receivers to detect and record them, and accessories to further support and enhance this tracking technology.
		Lotek's radio telemetry systems are among the most advanced of their kind in the world.
		Radio telemetry can be utilized in virtually any habitat, be it freshwater, terrestrial, marine or avian.
	www.lotek.com /radio.htm (740 words)

	Radio - Wikipedia, the free encyclopedia
		Radio was used to transmit pictures visible as television as early as the 1920s.
		Radio was used to pass on orders and communications between armies and navies on both sides in World War I; Germany used radio communications for diplomatic messages once its submarine cables were cut by the British.
		Radio remote control: Use of radio waves to transmit control data to a remote object as in some early forms of guided missile, some early TV remotes and a range of model boats, cars and aeroplanes.
	en.wikipedia.org /wiki/Radio (3944 words)

	Learn more about Radio in the online encyclopedia. (Site not responding. Last check: 2007-10-23)
		Radio is a technology that allows for the transmission of signals by modulation of electromagnetic waves.
		A radio wave is created whenever a charged object accelerates with a frequency that lies in the radio frequency (RF) portion of the electromagnetic spectrum.
		Radio teletypess usually operate on short-wave (HF) and are much loved by the military because they create written information without a skilled operator.
	www.onlineencyclopedia.org /r/ra/radio.html (2589 words)

	Radio -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-23)
		Radio was used to transmit pictures visible as (A telecommunication system that transmits images of objects (stationary or moving) between distant points) television as early as the (The decade from 1920 to 1929) 1920s.
		Another use of radio in the pre-war years was the development of detecting and locating aircraft and ships by the use of (Measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects) radar (Radio Detecting and Ranging).
		AM radio uses (Modulation of the amplitude of the (radio) carrier wave) amplitude modulation, in which louder sounds at the microphone causes wider fluctuations in the transmitter power while the transmitter frequency remains unchanged.
	www.absoluteastronomy.com /encyclopedia/r/ra/radio.htm (4631 words)

	ePanorama
		Generally a license is needed to operate a radio transmitter, unless you use a special radio system that is defined not specifically to need any special permit.Electromagnetic radiation is a wave that combines electric and magnetic fields, moving out from its source as an expanding sphere and having waves as the feilds alternate in value.
		The function of the radio receiver is to recover the audio signal that was modulated onto the RF carrier at the radio station, and apply it to the speaker, reproducing the sounds of the announcer.
		In trunked radio system every radio on the system 'listens' on a control channel, that is a data transmission giving the radios all their instructions.When a call is received, or made, the controlling data transmission tells the radios who wish to speak to each other which channel they need to switch to.
	www.epanorama.net /links/radio.html (12724 words)

	Simple Radio Transmitters
		These pages contain links to schematic diagrams and descriptions of some simple transmitters which can be built with a minimum number of parts and, if built with care, will work very well.
		You must have an F.C.C. amateur radio operators license of the proper class to use the transmitters on the air.
		The transmitters, except for the 813 oscillator transmitter, are usable only on CW (Morse Code) and are ordinarily unsuitable for any kind of voice work, as they are drawn here.
	www.mines.uidaho.edu /~glowbugs/transmitters.html (321 words)

	Brain Transmitters (Site not responding. Last check: 2007-10-23)
		There were also many at the hospitals who were forcibly placed there because they had declared that a transmitter had been implanted in their heads during an operation, or in conjunction with admittance to the mental hospital.
		The chart was created by a printer connected to a radio frequency analyzer computer during measurements from a transmitter in a person’s skull.
		Recent developments include pressure transmitters small enough to be placed in the eye, ultrasonic and radio units for free-swimming dolphins, units for tracking wild animals, and pill-sized transmitters of many designs and functions that can operate continuously for several years.
	home.att.net /~mcra/brain6.htm (5983 words)

	N.W.S. Birmingham, AL - NOAA Weather Radio (Site not responding. Last check: 2007-10-23)
		To accomplish this, five new transmitters were installed in the Fort Payne area of northeast Alabama, the Guin/Winfield area of northwest Alabama, the Cullman area of north-central Alabama, the Jackson area of southwest Alabama, and the Auburn area of east-central Alabama.
		As additional transmitters were added to the overall network, the potential for interference increased, so the National Weather Service began using some of the 'intermediate' frequencies that fall between the primary frequencies.
		New transmitters were needed to cover areas where Weather Radio reception was not available but where spacing was too close to stick to the original three frequencies.
	www.srh.noaa.gov /bmx/aware/noaawxr.html (1823 words)

	NATIONAL WEATHER SERVICE MARINE PRODUCTS VIA NOAA WEATHER RADIO
		The NOAA Weather Radio network provides voice broadcasts of local and coastal marine forecasts on a continuous cycle.
		To expand NOAA Weather Radio coverage in the State of Alaska, the National Weather Service (NWS) and U.S. Coast Guard are partnering to establish a network of low-power five-watt NOAA Weather Radio transmitters at 25 USCG "high" sites located from the Dixon Entrance to Bristol Bay.
		For mariners in transit who are using NOAA Weather Radio receivers with SAME capability, it is recommended the radio be set to the 'All County Code Option' to avoid the need to continually reprogram the unit as the vessel moves along the coast to prevent the possibility of missing important warnings.
	www.nws.noaa.gov /om/marine/wxradio.htm (1363 words)

	OET -- Human Exposure To Radiofrequency Fields From Cellular and PCS Radio Transmitters
		While a typical base station could have as many as 63 transmitters, not all of the transmitters would be expected to operate simultaneously thus reducing overall emission levels.
		In the case of cellular base station transmitters, at a frequency of 869 MHz (the lowest frequency used), the FCC's RF exposure guidelines recommend a maximum permissible exposure level of the general public (or exposure in "uncontrolled" environments) of about 580 microwatts per square centimeter (µW/cm2), as averaged over any thirty-minute period.
		For PCS base station transmitters, the same type of analysis holds, except that at the PCS transmitting frequencies (1850-1990 MHz) the FCC's exposure limits for the public are 1000 µW/cm2.
	www.fcc.gov /oet/rfsafety/cellpcs.html (2243 words)

	Radio Transmitters
		The radio transmitter accepts audio or coded intelligence and uses it to modulate one of 280,000 possible operating radio frequencies in the 2.0- to 29.999-megahertz frequency range.
		The transmitter has a normal rf output level of at least 100 milliwatts and is designed to be used with an associated rf power amplifier.
		When the AM and ssb transmit modes of operation are used, the output from a handset is applied to the transmitter.
	www.tpub.com /neets/book17/75b.htm (441 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 (281 words)

	SHORTWAVE RADIO TRANSMITTERS IN RUSSIA
		Some of the sites acknowledged by Radio Moscow were not the actual location where the transmitters were located.
		All of these sites are used to broadcast the Voice of Russia and Radio Rosii programs, but you should also be advised, that some of these transmitters are also used to relay some of the major international broadcasters.
		This one is a tough one to hear in the Chicago area, but if you are able to hear this one it counts as a separate radio country on the NASWA list.
	home.earthlink.net /~dxchicago/shortwave_radio_transmitters_in_.htm (1242 words)

	Beginners Guide to Ham Radio (Site not responding. Last check: 2007-10-23)
		Amateur radio is a community of people that use radio transmitters and receivers to communicate with other Amateur radio operators.
		Amateur radio operators are often called ham radio operators or simply "hams." (The origin of this nickname is for all practical purposes lost.
		While a short-wave radios or scanners will allow you to listen to the ham radio bands, what you will hear is hams talking to other hams and not music or other radio programs of `general' interest.
	www.irony.com /ham-howto.html (864 words)

	Mixed-Signal ICs - Si471x FM Radio Transmitters
		The device leverages Silicon Labs’ highly successful and proven Si4700/01 FM receiver, and offers unmatched integration and performance allowing FM transmit to be added to any portable device by using a single chip.
		The Si4711 supports the European Radio Data System (RDS) and the US Radio Broadcast Data System (RBDS) including all the symbol encoding, block synchronization and error correction functions.
		Users are responsible to adjust their system’s radiated power levels to comply with local regulations on RF transmission (FCC, ETSI, ARIB, etc.).
	www.silabs.com /tgwWebApp/public/web_content/products/Broadcast/Radio_Tuners/en/Si4710-11.htm (183 words)

	The Radio and Television Transmitters
		On the other hand, a channel 7 TV station will seldom cover such a distance, but when it does it will do so more readily by tropo than by sporadic E. So let's look at these mechanisms to which we owe our hobby.
		The normal service area from a high powered transmitter at VHF or UHF extends to and just beyond the optical horizon.
		Antenna polarization varies from one transmitter to another and either (H)orizontal or (V)ertical.
	www.geocities.com /TelevisionCity/Lot/2941 (612 words)

	Amateur radio links by YO5OFH, Csaba (Site not responding. Last check: 2007-10-23)
		Simple FM transmitter - circuit is a simple two transistor (2N2222) FM transmitter powered by a 9 volt battery
		Small Radio Transmitter - information about building a small radio transmitter, which has a PCB 1.75" x 2.5" (45mm x 68 mm) and has a range of about 30 yards or so at 85-108 MHz frequency range
		Micro Power AM Broadcast Transmitter - 74HC14 hex Schmitt trigger inverter is used as a square wave oscillator to drive a small signal transistor in a class C amplifier configuration
	www.qsl.net /yo5ofh/links/transmitters.htm (720 words)

	FOXNews.com - Britain OKs Radio Transmitters for iPods - Technology News \| News On Technology
		Devices such as the finger-length iTrip have been banned in Britain because they are considered radio stations under the country's 1949 Wireless Telegraphy Act.
		That means a user must have the right to transmit over an FM frequency and pay royalties for any tunes played on the music players, said Steve Hawkins, a managing director at A.M. Micro Distribution Ltd., which sells the iTrips.
		ITrip, made by Griffin Technology for Apple Computer Inc.'s iPod devices, is one of a number of devices meant to allow owners of music players to listen to tunes on their radios.
	www.foxnews.com /wires/2006Nov29/0,4670,iPodTransmitter,00.html (453 words)

	am radio broadcasting transmitters-Cecchile
		In 1893 he was able to transmit electromagnetica energy without cables, constructing the first transmitting radius going ahead to Guglielmo Marconi.
		financial support of George Westinghouse am radio broadcasting transmitters, the alternating current replaced the continuous one, being considered the founder of the electrical industry.In 1891 it invented the coil that takes its name.
		After hundreds on attempts and losses superior to 50000 dollars am radio broadcasting transmitters, it obtained a thread that reached the incandescence without being fused.
	www.cecchile.com /am_radio_broadcasting_transmitters/am.htm (459 words)

	Transmitter Sites from Hell ! RADIO STATIONS studio pictures AM towers LPFM audio news updates (Site not responding. Last check: 2007-10-23)
		Click HERE for a real-audio radio show that go's with this website.
		Attached Speaker means you can hear you show with or without a radio.
		For instance, he picked up Radio One (Nasdaq: ROIA - news) in 2000's fourth quarter.
	www.netfeed.com /~jhill (584 words)

	FM Radio Transmitters
		N.B. Please note that transmitting distances quoted for any transmitter cannot be guaranteed.
		The results you obtain depend very much on the sensitivity of the receiving FM radio, what buildings and other obstructions are between the transmitter and receiver, atmospheric conditions and other radio transmissions.
		The radio transmitters detailed herein are not licensable in the UK and the telephone devices detailed herein are not BABT approved for connection to telecommunication systems.
	www.quasarelectronics.com /fm_transmitters.htm (233 words)

	iTrip - Griffin Technology (Site not responding. Last check: 2007-10-23)
		The iTrip FM transmitter for the iPod can play your music through any FM radio in your car, at a party, or wherever the mood strikes you - and you have a radio.
		For example, with the iTrip, you can have the cleanest possible signal - because you can choose any radio station on the dial to tune for the best performance possible.
		The iTrip FM transmitter for the iPod can play your music through any FM radio - in your car, at a party - anywhere the mood strikes you and there's a radio.
	www.griffintechnology.com /products/itrip (302 words)

	Genie Radio Controls from HOOVER FENCE
		Handheld Transmitters, wireless keypads even mini-keychain remote controls.
		Multi-function transmitters operate multiple Genie garage door openers
		Provides entry into garage without transmitter or key.
	www.hooverfence.com /catalog/entry_systems/genie (173 words)

	FM Transmitters
		This Digital FM Transmitter lets you send a signal from any audio source to any radio easily, and without wires.
		Use it to send a radio signal to nearby radios around your home or workplace, even in your car.
		Amateur Radio, Amplifier, Audio Equipment, Clock Kits, Color Organs, Electronic Games, Electronic Kits by CanaKit, Electronic Parts and Components, Electronic Project Kits, Electronics for Kids, Light Effects, Miscellaneous Electronic Kits, Noise Effects, Power Supply, Radio Kits, Sensors and Remotes, Surveillance, Telephone Kits, Test Equipment and Tools, Timers and Relays, TV Video Kits
	www.hobbytron.com /FMTransmitter.html (478 words)

	FM radio broadcasting transmitters (Site not responding. Last check: 2007-10-23)
		THIS PAGE CONTAINS INFOS FOR TRANSMITTERS ON A 2W FM PLL part1
		A photo of a stereo fm pll unit housed, in a 19" rack mount box, by an amateur broadcaster.The unit is as it came, based on a 700mW (now is 1,1W) RFout,
		A Forum to exchange infos with other radio pirates
	www.geocities.com /pdmtr/fm (203 words)

	New Zealand Association of Radio Transmitters (NZART) Web: NZART Online
		Dedicated to Amateur Radio in New Zealand since 1926
		Cyril Rosewarne ZL2VBC advises of an update to the New Zealand Amateur Radio VoIP Systems map.
		1997-2007 Copyright © New Zealand Association of Radio Transmitters 1997-2007.
	www.nzart.org.nz /nzart (188 words)

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