Radio Distance Range Comparison of Ham CB FRS MURS GMRS Radios. Other factors are, the weather, the You are missing very important info. But elevate the antenna on a tower or mountain top and all bets are off. HAAT which is height above average terrain. (Note: Keep in mind that in our real world, not the smooth, bald, whimsical one, western Kansas is almost 4000 feet above sea level. different. People owning a CB radio often have one very common question. This equates to an area of almost 1300 NM² blanketed by your signal and preventing any one else the use of that frequency. However, the chart was not created to discuss such a comparison, since there are no 50 watt handheld GMRS radios on the market, at … Sure, a 50 watt system will provide greater range than a .5 watt radio by default. That depends on a number of variables and you have not given me the specifics. Generally, 0.5 watt (o.5W) channels cover less than a half mile while 2W channels work up to two miles. There is just not much remaining of a 5 watt HT signal after 171 miles. You could have two different people both using a 100 Watt FM transmitter and one of them will be getting 15 miles while the other person is only getting 1 mile. Covers Ham HF, 11 meters, CB, SSB, VHF FM, 2 meters, 10 meters, UHF walkie talkies, handy talkies, HT, … The most important factor of all perhaps is the antenna. The talk distance is the sum of the radio horizons of the transmitter and the receiver. General Mobile Radio Service or GMRS are higher powered devices that use systems and repeaters to increase the range of the radio. When you consider that at 25 watts you may have a transmission radius of 20 NM. There is no theoretical limit for the distance to receive a radio signal. A 12 Watt transmitter using a high gain antenna like the Aareff 5/8's vertical which as a gain of 4.8 dBi, and using 25 metres of RG213 low loss coax would effectively double the power to … There is so much more to how far your signal travels than just wattage. Attenuation due to the curvature of the earch. One of the radios being considered is 65-watts. Reducing the power of your radio to 1 watt for short distance communications is a simple courtesy. That is, how far will the signals of their CB radio actually reach? The single biggest factor in how far you signal goes is your antenna. I don't have a license yet but it's in the works. So as you can see by the above list there is no one single answer to the question. The question came up while discussing a research project and how we could transmit data from a site without reliable cell coverage. This is a macro form of intervening terrain. A quarter wave at ground level and 15 watts will have a certain reach. However, if you bumped up the transmit power substantially, you might be able to hit the repeater from the Sunflower State. It's a no-brainer, and a silly point to argue indeed. Cosmic microwave background radiation (observed by radio telescopes) comes from the edge of the observable universe (over 5 billion light years away). \$\endgroup\$ – SpecialAgent_W436 Jul 26 '11 at 23:53 There are a few variables that determine the range of a CB radio. As a broad rule of thumb, the distance to the radio horizon of a transmitter or receiver, in miles, is 1.34 times the height of the antenna, in feet. FRS radios have a maximum allowable power of 2W. In fact, simply putting a 100 watt linear on a radio is not going to do a whole lot for you. Well, although it sounds like a very straightforward question, the answer is a bit complicated.
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