The Iridium satellite constellation is a system of 66 active satellites (and 9 spares in space) used for worldwide voice and data communication from hand-held satellite devices and other transceiver units. As a general rule, the lower the frequency, the greater distance it can travel. For handheld radios, instead of a stubby antenna, get a whip antenna. you ask. A mobile radio, which has between 25 and 50 watts of output power, is hooked up to the mains or to a car battery and is a pretty substantial radio. Perfect for those needing global or back-country remote communications, such as gas and oil exploration, back-country search and rescue operations, or other other companies needing global communications in areas where infrastructure does not exist. To see product price, add this item to your cart. The two frequency ranges (also called "frequency bands") used in most two-way radios are VHF (Very High Frequency), and UHF (Ultra High Frequency). They differ in how they travel, and how they react when they encounter materials. But keep reading, there are other things to consider as well, such as power and obstructions. Assume you are trying to communicate from one side of a commercial building to the other. Are you guaranteed to get 6 miles? One benefit of radios with SSB channels is additional power. Also, the denser an object, the more it reduces the signal strength. Remember the higher your antenna the father the horizon is. However, each time a radio signal passes through an object the signal strength is reduced. So how far can you really expect to talk? Perfect for those looking for the longest range possible and easy setup, such as companies operating vehicle fleets in large metropolitan areas. Unlike frequencies below 2MHz, radio waves in these higher frequencies travel in straight lines (called "line-of-sight" signals), and generally cannot travel beyond the horizon. But marine radios have a big advantage, there are no obstacles on the open water! Satellite radios require a monthly service fee for the satellite usage. No single factor is a silver-bullet to extend your communication range. Another consideration is hills. Not all antennas on handheld radios are the same. is one of the most common questions people ask when buying a two-way radio. Many FRS/GMRS radios on the market today have a stubby antenna because it's easier to put your radio in a backpack or pocket. A panic button can be triggered by the front panel button to alert the dispatcher when problemens arise. Their biggest advantage is to extend the communication range beyond the capabilities of an RF system, but it's important to understand the differences, advantages, and disadvantages of each. Most airband radios are 5 - 8 watts and typically have a range of around 200 miles. If you’re using a 5-watt HAM handheld, we provide radios up to 50-Watts for more range and distance. One last thing we didn't mention is the weather, and other atmospheric conditions can affect radio transmissions. Not so fast. Remember, UHF signals are shorter than VHF, this is important when you're in or around buildings. * Although FRS radios can have up to 2 watts, many manufacturers are still currently selling FRS radios with 1/2 watts. you ask. If you search for reviews on these same radios, you will find many disappointed people saying they can't get anywhere close to the advertised range. One of the easiest ways to extend your range is by focusing on your antenna. The higher your antenna, the farther your signal can reach before hitting the horizon, therefore the longer your communication range. The key factors affecting communication range are: antenna, obstructions, signal strength (wattage), and signal type. Aviation radios in the air have the most advantage, no obstacles and you're already very high! If you are using the radio primarily outdoors with clear line-of-sight, then VHF is a better choice because it's signal will travel farther. So with each successive object a signal passes through, it's range is shortened. Another important factor in determining the distance a radio can communicate is it's signal strength. Other handheld radios such as marine, aviation, and licensed land-based radios such as: LMR, Ham, & GRMS are limited to 5 watts, again radios with SSB can have 12 watts. VHF can also travel farther. Metal is not your friend when it comes to radio communications. 4424 Bragg Blvd., Suite 101Fayetteville, NC 28303, Only registered users can write reviews. The key words in the advertisement are \"up to\". IP radios require a controller, which is connected to your network. If you live in an area with hills, they are like metal, no radio signal will pass through them. CB radios, and some HAM frequencies, are in the HF (High Frequency) range of 29-54MHz, giving them some of these qualities. Handheld radios have 2 common types of antennas: stubby and whip. Satellite radios communicate through an array of satellites know as the Iridium satellite constellation. Remember at the beginning we discussed the claims some radio brands make of "up to 36 miles" or more communication range? We have the largest in-house inventory in our industry so that we can provide the fastest delivery for our valued customers.

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