2 way uhf

Most people who have tried it would agree that conducting an international phone number look up is a very difficult and time consuming process. Many countries have different laws and regulations about reverse phone directories and who can access and use them. These directories are what you use to look up phone numbers and find out who they belong to. In fact, in some countries reverse phone directories are illegal. Here are some pointers to help you get started.

1. Start by doing basic searches on search engines online.

Search using the local search engines for the country that the number you want to look up is registered in. Popular search engines such as Google, Yahoo, and MSN have local versions in many countries. You can also just search from the main search engine home page such as Google.com, Yahoo.com or MSN.com. If the international phone number you're looking for is available or posted on some website, then you'll be able to find the associated details that you're looking for. Some countries have some free phone lookup sites so use that if available.

2. Use an International phone number lookup company

There are a few of these companies online so if you look on any search engine you should be able to find one. The only disadvantage to using these services is that they are very expensive. Expect to pay upwards of $150 per search. Some of the companies don't even guarantee that they'll get you a result.

3. Private investigator

You can also hire a private investigator to do the phone number search for. They often have access to a lot of resources that you couldn't have access to if you decided to look on your own. Just look in your phone directory or your local business directory and you'll find a private investigator that may be able to conduct an international phone number lookup for you.

4. Use a Reverse Phone Directory for that country if available.

You can look up owners of phone numbers in most countries using a reverse phone number lookup directory. For most countries such as the US and Canada, there are many websites that offer services that you can use. This is probably the quickest and cheapest way to look up an international phone number. When choosing a reverse phone lookup directory look for a directory that is membership based. These are much cheaper than the ones that charge you for each search you conduct.

As you can see from the methods outlined above, there are different ways you can use to perform an international phone number lookup. Using a reverse phone directory where available is the fastest and quickest method to do it.

Need to Conduct Your Own International Phone Number Lookup Online? Click here for a comprehensive list of websites where you can lookup any phone number and find out who it belongs to. Visit the Reverse Phone Search website for more tips and advice on how to find information fast.

Copyright © Sylvia Richards.

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NewsMakers Date: Tuesday, 15th September 2009 Host: Mike Yardley The Driving Law Review Debate Mike Yardley hosts a panel discussion on the governments draft road safety strategy. Proposals include lifting the driving age, slashing the blood-alcohol limit and changing our give way rules. On the panel, local MPs Brendon Burns and Aaron Glimore, and the Automobile Associations Jayne Gale. Newsmakers: The Panel Friday 8:30pm, Repeats Sunday 5:30pm CTV, your home channel UHF: 44 Christchurch TelstraClear Channel: 16 Christchurch & Wellington www.ctv.co.nz

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This is from Top Gear Rally Report 1993 . ex - BBC2 . Sorry about the picture quality but this is from a mono VHS VCR recording from a 405 line Black and White (!) VHF TV aerial getting the Winter Hill transmitter signal bounced off a Gasometer (!) as we are on a hill and 1/2 way down it, so on the 'blind side' from Winter Hill...we are probably the only domestic home in England never to have had a colour 625 line UHF TV aerial ! Use &fmt=18 after web link to get HQ version.

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It is necessary to know what exactly two way radios are to understand its features and advantages completely. In simplest terms, two way radios can be termed as transceivers that transmit and receive the content. The device gets activated by a push button. This hand held device, available in mobile and stationery base configuration, is also popularly known as a walkie-talkie. It would be of great interest to know that this wonderful device that was once upon a time exclusively meant for military and police is now making its way to civilian population.

The upward swing in the popularity of two way radios have led to more and more innovations being programmed into the device. Every model that is launched contains some special feature that has really propelled its popularity to mammoth proportions. Today, two way radios have several channels to their credit and, depending on the type of radio one is using one can opt for the channels of his choice. There are a total of 23 channels in GMRS (General Mobile Radio Service) and 14 in FRS (Family Radio Service).

There are several other highlights that go a long way in popularising two way radios. Their batteries, for instance, are extremely durable. Then again, different sets of two way radios are available for different people. These days, they even provide weather forecast by meteorological department. There is one important piece of advice for people who want to opt for two way radios. Those who are going to use it fairly regularly should opt for Nickel Metal Hydride or Nickel Cadmium batteries that can be recharged. On the other hand, people who would use their radio sparingly should opt for AA and AAA alkaline batteries. Two way radios can easily be carried anywhere as well.

With so many outstanding features programmed in two way radios, it really should not come as a surprise that they are on top of everyone's wish list in the UK.

Dennis Jaylon is a renowned business writer who has years of experience in writing technical reviews, product descriptions and product feature analysis of technical gadgets and gizmos. He has won appreciation especially for enlightening people about the latest communication gizmos...the two way radios

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Vertex Standard VX231 Portable Radio is Available at PSICOMPANY.COM. Call 1.800.826.2907 For more Information on Standard Radio VX-231 Portable Radio: VHF- www.psicompany.com www.psicompany.com UHF- www.psicompany.com The new Vertex Standard VX-231 portable offers ample features in a cost competitive portable: • 16 Channel Capacity • 5 Watts in VHF or UHF • Increased Frequency Coverage • Large capacity Lithium-ion battery • Built-in Emergency Feature • Lone Worker functions • Talk Around Scan The VX-231 portable was designed and built to meet 11 different Mil-Spec standards covering Mil-Std 810 C/D/E/F. Talk Around Scan For smaller groups working remotely, the Talk Around Scan feature will monitor both the repeater input and output to determine if direct (talkaround) communication is reliable. If so, the radio will automatically switch to Talkaround mode to reduce unnecessary airtime through the repeater system. Wideband Coverage The VX-231 includes the expanded range of 134 MHz - 174 MHz and 450 MHz - 512 MHz. There are different antennas optimized for certain sections of the VHF or UHF range. Large Capacity Lithium-ion Battery The VX-231 can be combined with the 2000 mAh FNB-V104Li battery. With the FNB-V104Li, the VX-231 battery life (5-5-90) is over 13 hours. That's without and power saver! Built-in Emergency Feature The built-in emergency feature acts as a panic button to call for help in any situation. This feature, when activated, goes to a pre-programmed channel ...

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Icom IC-F5061 and IC-F6061 Mobile Radio at Available at PSICOMPANY.COM. Call 1.800.826.2907 More Information on Icom IC-F5061 and IC-F6061 Mobile Radio: www.psicompany.com www.psicompany.com The IC-F5061/F6061 is ideal for public safety, transportation and delivery service users. It offers advanced multi-mode operations, improved scanning and flexible installation suitable for mobile and base stations. MDC 1200 Compatible Advanced automatic number identification (ANI), selective call (Selcall) and emergency call features are available with the built-in MDC signaling. The PTT ID function sends your unit ID number when you push (or release) the PTT button. The received ID number can be decoded to a user name using the alias table. The selcall enables you to call individual or group users as you desire. The emergency call feature allows you to send and repeat an emergency message to dispatch until the dispatch responds to it. In such a situation, the radio can transmit anything the microphone hears and the dispatcher can monitor the background sound. Radio check, status, message, radio stun, revive and call log are also available. 6.25kHz Digital mode ready With the optional UT-119H, the IC-F5061 series provides 6.25kHz digital narrow mode communication that meets the FCC 6.25kHz emission mask requirements for narrow banding, and increases efficiency of channel allocation and use of spectrum. The IC-F5061 series provides 2 optional slots: one for the UT-119H digital unit and ...

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This radio is amazing, to many features to list, enjoy the little video of some of the features. You can hear FM Radio while the radio scans your UHF frequencies, once it finds an active frequency it swicth to it. LOVE IT FOR ALPHA TAGS you will need the programming cable/software.

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There are two major formats for two-way radios. They are Ultra High Frequency (UHF) radio and Very High Frequency (VHF) radio. Neither frequency band is inherently better than the other. They each have their pluses and minuses. Both formats are effective ways to communicate with another person. But how do you decide which one will fit your needs? Let's go over the key components of both frequencies to help you decide.

Two-way radios communicate with each other through use of radio waves. Radio waves have different frequencies, and by tuning a radio receiver to a specific frequency you can pick up a specific signal.

Radio waves are transmitted as a series of cycles, one after the other. You will always see the "Hz" abbreviation used to indicate the frequency of a radio. Hertz is equal to one cycle per second.

Radio waves are measured by kilohertz (kHz), which is equal to 1000 cycles per second, or megahertz (MHz), which is equal to 1,000,000 cycles per second--or 1000 kHz. The relationship between these units is like this: 1,000,000 Hertz = 1000 kilohertz = 1 megahertz.

You may also hear the term "wavelength" when you hear about radio waves. This term is from the early days of radio when frequencies were measured in terms of the distance between the peaks of two consecutive cycles of a radio wave instead of the number of cycles per second. Lower frequencies produce a longer wavelength.

While wavelength measures distance between the peaks of cycles, frequency refers to how long the measured time is between the "crest" and "trough" of a wave arriving at the source. So frequency measures time instead of distance, but they are essentially both saying the same thing.

What is significant about wavelength for two-way radios is that it affects transmission range under certain conditions. A longer wavelength as a general rule lets a radio signal travel a greater distance.

Lower frequencies or wavelengths have greater penetrating power. That's one of the reasons they are used for communicating with submarines. VLF radio waves (3-30 kHz) can penetrate sea water to a depth of approximately 20 meters. So a submarine at shallow depth can use these frequencies.

So from what you read above you may think VHF is always the better choice for a two-way radio no matter where you are using it. That's not necessarily true. Even though VHF has better penetrating capabilities, that doesn't necessarily make it the better choice for buildings. Remember the conversation about wavelength above? Wavelength has a big impact on transmission.

To explain this let's assume we are communicating from one side of a commercial building to the other. In between these two points is a metal wall with a three foot door in it. Metal is an enemy to radio waves and they typically don't pass through it.

For our example let's assume that the UHF wavelength the radio uses is about a foot and a half long and a similar VHF radio is around five feet long. These are in the ballpark of their normal wavelengths.

When the UHF transmits its signal the foot and a half long wave will pass through the door since the door is wider than the wavelength. The VHF signal will be totally reflected since it is wider than the opening to the door.

Your microwave oven is an example of this. The glass front door has a metal mesh with very small holes. Microwaves being a very high frequency have wavelengths that are only several inches long. The mesh keeps the microwaves trapped in the oven but it allows you to see inside because light waves have a microscopic wavelength.

Just imagine walking through the building carrying a five foot wide pole. You will encounter the same challenges a VHF signal encounters. Now imagine walking through the building with a pole that's only a foot and a half wide like a UHF wave. There are lots fewer doorways you couldn't get through.

The one difference is that wireless signals will penetrate through drywall, masonry, human bodies, furniture, wall paneling, and other solid objects. All these objects will reduce the signal strength though. The more dense the object, the more it reduces the signal. VHF will penetrate these obstacles better than UHF, but that doesn't necessarily mean that VHF is better for indoor applications as we will talk about in the UHF section below.

In our example above we assumed you had a metal wall with an opening. If you reverse this and you have a three foot metal object in front of the transmitting radio, then VHF would win. Since the object is three foot wide it will totally block the UHF signal whereas the VHF signal will get around it. Lower frequencies such as VHF diffract around large smooth obstacles more easily, and they also travel more easily through brick and stone.

For most applications, lower radio frequencies are better for longer range. A broadcasting TV station illustrates this. A typical VHF station operates at about 100,000 watts and has a coverage radius range of about 60 miles. A UHF station with a 60-mile coverage radius requires transmitting at 3,000,000 watts.

So there is no clear choice for which is better, VHF or UHF. There is a lot of "black magic" to radio technology so it's not always easy to tell which will work better for your application. To help you decide on the best technology for you, more detail about each one is included below.

UHF Radio

UHF equipment operates between the frequencies of 300 MHz and 3000 MHz. Until recently, it wasn't widely used. Now, the UHF radio frequency is used for GPS, Bluetooth, cordless phones, and WiFi.

There are more available channels with UHF so in more populated areas UHF may be less likely to have interference from other systems. If you are in an area where population is thin, VHF should work fine for you. Not too long ago the FCC also opened up a new VHF frequency called MURS that is so far not heavily used in most areas. There's more about MURS below in the VHF section. If you are in an area where interference from other radios may be an issue, UHF transmitters and receivers could be your best choice unless you use a MURS VHF radio. UHF is better at squeezing through physical barriers like walls, buildings, and rugged landscape. Anything that obstructs a radio wave, will weaken a radio signal. UHF lessens that effect. Though it may not travel as far, UHF radio waves will traverse around obstacles better than VHF.

To highlight the differences in indoor range, below is an excerpt from a brochure of a leading two-way radio maker on the predicted range of one of their lines of handheld VHF and UHF two-way radios:

"Coverage estimates: At full power, line-of-sight, no obstructions the range is approximately 4+ miles. Indoor coverage at VHF is approximately 270,000 sq ft and 300,000 sq ft at UHF. Expect about 20 floors vertical coverage at VHF and up to 30 floors at UHF. Note: Range and coverage are estimates and are not guaranteed."

VHF waves are not very good at finding their way around walls, buildings and rugged landscape. Therefore range will be significantly reduced for VHF radios in these environments. That may not necessarily be a problem if the range needed is only a few hundred feet. You can also add an external antenna to an indoor VHF base station that will reduce or eliminate this problem.

One of the downsides to UHF is that the FCC requires you to get a license to operate in these frequencies. Although many frequencies in the VHF business band also require a license. If you choose a radio in the VHF MURS frequencies you can operate it without a license. UHF equipment is usually more expensive. The components need to be finely tuned and are more expensive to construct. This does not mean it's necessarily better, just more expensive.

One advantage of UHF transmission is the physically short wave that is produced by the high frequency. That means the antenna on the radio can be shorter than an equivalent VHF radio.

VHF Radio

VHF equipment operates between the frequencies of 30 MHz and 300 MHz. FM radio, two-way radios, and television broadcasts operate in this range.

Both UHF and VHF radios are prone to line of sight factors, but VHF a little more so. The waves make it through trees and rugged landscapes, but not as well as UHF frequencies do. However, if a VHF wave and a UHF wave were transmitted over an area without barriers, the VHF wave would travel almost twice as far. This makes VHF easier to broadcast over a long range. If you are working mostly outdoors, a VHF radio is probably the best choice, especially if you are using a base station radio indoors and you add the external antenna.

Since VHF has been around longer and isn't as complicated to make, equipment is usually cheaper when compared to similar UHF equipment. One disadvantage to this equipment can be its size. Since the frequency waves are bigger, an antenna must be bigger.

VHF radios also have a smaller number of available frequencies. Interference with other radios could be more likely to be a problem. However, the FCC recently made this less of a problem when they opened up the MURS frequencies. The 150 MHz frequency is a Citizens Band radio spectrum that is called the MURS service. MURS stands for Multi-Use Radio Service. This service is for use in the United States and Canada. It is a low power, short range service in the VHF 150 MHz Citizens Band radio spectrum. There are 5 channels in the MURS frequencies with 38 privacy codes under each one that enable you to only pick up conversations on your code. The FCC does not require users of products for MURS to be licensed.

With MURS you can add a larger or external antenna to improve range. If you want to put an antenna on top of your house or business, you can do it with MURS. Some antenna manufacturers claim an external antenna can increase the effective radiated power of a transmitter by a factor of 4. These MURS intercoms can transmit up to four miles, and perhaps more with an external antenna depending on the terrain.

One benefit of VHF wireless radios is that battery life is almost always better than for similar UHF units. For handheld radios this is a plus.

VHF equipment is usually lower cost for those on a budget. Equipment can be more economical than similar UHF products.

In summary, if you are planning on using your two-way radios mainly inside buildings, then UHF is likely the best solution for you. If you are mainly using your two-way radios for communication outside, then VHF would be a good choice. Either radio technology can work for you if you don't really have a long range to cover. In that case you may want to choose VHF for it's lower cost.

David Onslow is the marketing director at IntercomsOnline.com, which specializes in selling two-way radio and intercom systems for business use. Go to http://www.IntercomsOnline.com to see VHF and UHF two-way radios and intercoms.

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