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Topic: UHF CB

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Ultra high frequency

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	Review: Digitalk Communicator hand-held UHF CB radio
		UHF CB suffers much less from interference and has better sound quality, but its range is much lousier.
		The UHF CB repeater channels are numbers 1 through 8, with channel 5 reserved for emergency traffic, and the channel pair spacing is the same for all of them - 2 pairs with 32, 3 pairs with 33, and so on.
		In Sydney, for instance, UHF Channel 1 is repeated by a chap in Hurstville whose repeater is instantly recognisable, thanks to its insertion of a "quack quack" sound effect every time someone dekeys (stops transmitting).
	www.dansdata.com /digitalk.htm (2631 words)

	Welcome to UHFworld - Radio Communications at your finger tips.
		On UHF CB when repeaters are used it's termed duplex, and when repeaters aren't used it's termed simplex.
		UHF CB radios are generally short range radios, and the Australian Government decided to limit the power of the CB radios so people couldn't talk too far and so I suppose there wouldn't be over crowding of the band due to a lot of high powered stations talking.
		Beam antennae effectively harness the limited output of 477MHz CB stations and also cut down on interference from other stations that may be on the same channel although not along a direct path between the two stations.
	www.uhfworld.com /about.htm (977 words)

	CB Radios On The BNT (Site not responding. Last check: 2007-10-31)
		To improve range, some CB clubs (in populated areas) and outback stations have installed UHF CB repeaters on high ground or towers but both parties in the conversation must still be able to have "line of sight" access to the repeater antenna.
		To use a UHF CB repeater, both radios must be set to the repeater channel and have "Duplex" mode selected.
		Trekkers need to weigh up the benefits of CB radio against its limitations and the fact that it is something more to carry and feed batteries to when making their decision weather to carry CB radio handset/s or not on the BNT.
	home.vicnet.net.au /~bnt/CB_Radios.htm (500 words)

	UHF CB RADIOS (Site not responding. Last check: 2007-10-31)
		UHF CB's are probably the most essential radio to have as they enable travelers to obtain valuable local knowledge.
		The typical range of UHF CB radios is between 5 and 25 km (mobile to mobile) and further from a base station or through a repeater.
		GME are an Australian made UHF CB with excellent reliability, easy to operate controls, advanced design and features, two year warranty, Australian wide dealer network and after sales technical support.
	www.austek.net.au /uhfcb.html (633 words)

	UHF CB radio
		On UHF CB when repeaters are used it's termed duplex, and when repeaters aren't used it's termed simplex.
		The C.B will display channel 1, because that is what you are receiving, but if you are using 'Duplex', then you are transmitting on 31 and receiving on 1.
		UHF CB radios are generally short range radios, and the Australian Government decided to limit the power of the CB radios so people couldn't talk too far and so I suppose there wouldn't be over crowding of the band due to a lot of high powered stations talking.
	www.roity.com /rc/cbradio/uhfcb.html (314 words)

	UHF Transceivers
		Simple, practical and affordable, the TX3200 is a tough compact UHF transceiver with built in scanning.
		Add to that the 2 year GME warranty and you have a UHF transceiver that's unsurpassed in its category.
		The TX6200 is not only a fully featured 40 channel UHF CB Transceiver but also incorporates a wide band receiver capable of storing an extra 20 channels between 403 and 520 MHz.
	www.gme.net.nz /uhf_transceivers.html (1308 words)

	Peter Parker Online: CB Radio
		CB radio is intended to provide short-range radio communication for almost any purpose, business or personal.
		UHF really comes into its own when repeater stations are used. Repeaters are installed on hilltops and retransmit signals received on one channel onto another channel.
		UHF simplex operation is similar to 27 MHz AM. Find a busy channel and say 'breaker' to join a conversation. Do this just after the person talking finishes their transmission.
	www.alphalink.com.au /~parkerp/cb.htm (2934 words)

	ACBRO Team Inc 1980 - Advocates For Australian CB Radio Clubs And Operators
		UHF Repeaters are special stations that are mostly owned by businesses, farmers and clubs and are situated in cities and rural areas on the highest points available.
		A signal received by it from a UHF set on a repeater output channel, even if it is weak and noisy, is instantly re-transmitted at full strength to another UHF set's input channel.
		The comprehensive list of UHF CB Radio repeater stations around Australia would probably be much smaller were it not for the business community's participation, both active and financial in establishing and maintaining such repeaters.
	acbro.org /auhfbusiness.htm (3041 words)

	IC-40jr (Site not responding. Last check: 2007-10-31)
		UHF radios are almost never bothered by interference from other operating electrical devices, such as jet skis, automobile alternators, or computers.
		ICOM's UHF CB radios take advantage of what is known as "selective calling"; an internal decoding system filters out communications that are not transmitting using a specific, user selectable code.
		While CB communications are good for either short or long distance communication, the sound quality is often full of static, with lots of crackle and popping.
	www.icom.net.au /2000_web/products/uhf/joey/ic40jr_whyandhow.html (699 words)

	SingaporeMoms - Parenting Encyclopedia - Ultra high frequency
		UHF and VHF are the most common frequency bands for television.
		Modern mobile phones also transmit and receive within the UHF spectrum, and UHF is widely used for two-way radio communication (usually using narrowband frequency modulation, but digital services are on the rise) by both public service agencies and the general public.
		UHF is also widely used in two-way radio systems and cordless phones due to the fact that since UHF signals essentially travel over line-of-sight distances, distant transmissions cannot travel far enough to interfere with local transmissions.
	www.singaporemoms.com /parenting/UHF (952 words)

	[No title] (Site not responding. Last check: 2007-10-31)
		After a five year phase-in period all CB operations would be moved to UHF from the 27Mhz band, because they can cause interference on 27Mhz.
		Robinson warned CB enthusiasts to be sure any equipment that they bought met the Government specifications and was within the Act.
		The Government has decided to move CB to the less-congested UHF band because the risk of interference to radio and television could be much less.
	www.lycos.com /info/cb-radio.html?page=2 (598 words)

	history2
		The new government seemed more amenable to CB, so some proposals for legal CB were released to the CB press in April of 1981.
		In 1977 there were no UHF CBs, no manufacturers had started making any yet and users weren’t to concerned as they had 27MHz gear and were happy with it.
		I know a few CB enthusiasts who have bought them and are enjoying using them as a short range CB style service, but the main usage seems to be by people with no interest in 27MHz CB.
	mysite.wanadoo-members.co.uk /934mhz/history2.htm (2966 words)

	Tips and tricks on how to build your own CB Antennas.
		On VHF and UHF mobile radio bands, the whips are so short that they may be phased vertically in a collinear array to achieve increased gain on transmit and receive.
		This CB antenna consists of a driven element and four radial wires that act as a ground.
		Your base CB antenna system may be put up 20 feet higher than the highest point of the building or tree on which it is mounted; however, the highest point of the antenna must not be more than 60 feet above the ground.
	home.att.net /~wizardoz/cbmw/antenna_fabri.html (2767 words)

	Better db gain for UHF cb - Electronic Circuits Projects Diagrams Free
		UHF isn't simple to build, nor cheap - by far the most effective method would be to use a better aerial - a decent size Yagi will give you 10dB gain on both transmit AND receive, and at UHF frequencies you can get higher gain than that quite easily, because of their small size.
		Also bear in mind that UHF is 'line of sight', so range is fairly low unless you are on the top of a hill.
		However, at VHF and UHF frequencies the limiting factor is the noise of the front end devices, unless your existing front end is particularly noisy it's unlikely a preamp will make very much difference.
	www.electro-tech-online.com /electronic-projects-design-ideas-reviews/25139-better-db-gain-uhf-cb.html (1295 words)

	All Nite Jukebox Hire UHF CB handheld digitech DC1010 DC1030 DC1040
		Because of the quality achieved with UHF transmissions, the transceiver is excellent for anyone who uses their mobile phone to communicate with a family member, workmate or friend, living or working nearby.
		This high-quality light-weight UHF transceiver is ideal for use in many professional and leisure activities, including hiking, camping, farming, building, inter-car road trip communication, IT and Electrical installation.
		Designed exclusively for the 40 Channel UHF CB Transceiver, this charger plugs directly into your vehicles cigarette lighter socket and the transceiver to charge 4 x AAA Ni-MH batteries.
	www.users.bigpond.com /allnitejukebox/uhf/dihand.htm (1329 words)

	Telstat: Communicate - UHF CB Radio's General
		Email Us 477 Mhz "UHF" UHF CB radio is rapidly taking over from the older types of CB Radio's 27Mhz type.
		Unfortunately with a line of sight range of 5 to 20 Kilometres "UHF" is still unsuited for Emergencys in remote locations.
		Farming areas, however usually have Repeaters stations within range which Help by boosting UHF Signals to 100 Kilometres or more, but once again these repeaters are not available in remote locations.There are about 300 of these repeater Australia wide and are not linked to each other to give even more range.
	www.telstat.com.au /comm3.htm (174 words)

	Weather and Amateur Radio
		AM CBs are the most economical form of radio communications of use to the chaser, with a range of 5 to 15km, depending on terrain and antennas used.
		UHF CB is a similar service to 27 MHz and operates under the same rules.
		These low powered UHF CBs are capable of 1km car-car range and can cost as little as $30-$40 each and require no installation (great for lending to someone with no radio in the car).
	vkradio.com /weather.html (2234 words)

	FCC Rules for CB Radio
		You must operate your CB station according to any applicable treaty to which the United States is a party.
		If your CB station is near an airport, you may contact the nearest FCC field office for a worksheet to help you figure the maximum allowable height for your antenna.
		When you are using your CB station to assist a traveler, you do not have to obey Rule 16 about the length of transmissions.
	www.reactintl.org /rules-cb.htm (2936 words)

	Boostcruising.com - UHF CB Radio Information and Selection Guide...
		One particular example is two car's both with UHF CB's, one at the front and one at the end of the pack, and making sure that everyone sticks together.
		Cons: scanning functions appear to be completely seperate to UHF CB operations, and scanning on both UHF CB channels and programmed channels appears to not be possible.
		UHF CB's were never a very popular item, but since UHF CB's have been classed as not requiring a license some couple years ago, they're picking up in popularity due to their range and usefulness compared to a $50 pair of walkie-talkies!
	www.boostcruising.com /misc/cb.php (1279 words)

	UHF Repeaters - How they operate.
		It goes without saying I think, that if you are going to use the UHF band, you at least understand the function of repeaters and their allocation of set input and output frequencies within the 40 channel UHF band.
		All modern UHF CB transceivers have the function of being able to select duplex on channels 1 to 8.
		As the Authorities seem little interested to contribute to any policing of the band, it is largely up to the UHF fraternity to conduct themselves in a proper manner on the air and in doing so set a good example to others.
	users.bmail.com.au /ramab/kby/anatomy.htm (1081 words)

	GME, Uniden and Icom UHF Radio Equipment
		UHF Radio is a form of ground wave communication that is highly recommended for coastal, outback, warehouse and business communications in Australia.
		UHF radio is available in handheld or mobile units.
		Duplex is the term used for UHF radios for repeater use.
	www.olbis.com.au /ap_template/subcat_uhf.asp (808 words)

	Outback Communications Guide (Site not responding. Last check: 2007-10-31)
		The range of UHF CB radios is limited to around a 50-kilometre line of site in simplex mode.
		A repeater is simply two UHF transceivers connected back to back, situated in a location to provide an extension of the operating range of the UHF CB.
		A great example of the use of a UHF is if the last vehicle in the group has a Flat tyre they can stop all other vehicles from leaving them behind.
	www.desertaccess.com.au /communications.html (2052 words)

	yeticomnz.com
		Each country has different rules but usually the authorities want to see filtering on the output of solid state amps and an amp that is not keyed (switched to TX) by RF but by an external lead connected to the radio.
		In the US amps need to be modified so they will not easily work on 10m to prevent their use on 11m CB band.
		If you can’t afford the best little UHF CB set available in NZ (the IC208H) but you still want 50w on UHF CB and FRS this is the way to go!
	www.survival-systems.com /yeticom/dave_linear.html (1767 words)

	Amphenol RF- UHF Connector Series
		Invented in the 1930's by an Amphenol engineer named E. Clark Quackenbush, UHF coaxial connectors are general purpose units developed for use in low frequency systems from 0.6 - 300 MHz.
		Invented for use in the radio industry, UHF is an acronym for Ultra High Frequency because at the time 300 MHz was considered high frequency.
		Note: These characteristics are typical but may not apply to all connectors.
	www.amphenolrf.com /products/uhf.asp (143 words)

	UHF CB twin pack FS (Site not responding. Last check: 2007-10-31)
		UHF CB twin pack FS Boats > Australian Sport Sailing > UHF CB twin pac...
		UHF CB twin pack FS by "Garry Beattie" Jan 31, 2007 at 12:55 PM
		have a look at:- http://www.oztion.com.au/buy/auction.aspx?itemid=1268230&d=&sort=0&pg=1&cat=0&view=List&f1=&f2=&type2=&type3=&type4=&type5=discount_marine_world&s= If anyone is looking for a New UHF CB twin pack (fixed mount and handheld) for a cheap price.
	www.talkaboutboats.com /group/aus.sport.sailing/messages/6433.html (95 words)

	The DXZone: ham-radio, shortwave and cb-radio guide
		Clubs and Organizations, Alfa Tango, Sugar Delta, India Radio, Personal Pages, CB Packet Radio Reference, CB radios manufacturers, CB radio modifications,
		The Micamold XTR-1 transmitter manufactured in 1948 by the MICAMOLD Radio corp. of Brooklyn, New York.
		Welcome to the web site of Wilson Antenna, Inc., manufacturers of the worlds most powerful CB antennas for the automobile and 18 wheel tractor rigs.
	www.dxzone.com (749 words)

	Mobile antenna : Manufacturers: Antennas: VHF UHF Microwave: Mobile Antennas
		Antenna Specialists - Land Mobile, CB and scanner antennas, GPS, 800 and 900 Mhz antennas
		Scout Telecomunicazioni - VHF, UHF, CB antennas for marine, mobile, base, remote radio monitoring and control system
		Trivalantene - Professional antennas in MF, VHF, UHF and SHF frequency range for military applications, civil-professional market, mobile communications, radioamateurs and antennas for special applications - EMC, radiomonitoring, etc.
	www.dxzone.com /catalog/Manufacturers/Antennas/VHF_UHF_Microwave/Mobile_Antennas (649 words)

	Best Engine Performance
		Easy to use, just plug on end into the car's cigarette lighter socket and the other directly into the 40ch Long Range UHF CB Handheld Radio...
		Leather Carry Case to suit 40Channel UHF CB Long Range Transceiver with belt clip....
		This compact 1.5W 40 channel UHF CB has a range of up to 8km in "line of sight" conditions.
	www.bestengineperformance.com /pshop.php (441 words)

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