The gmrs 50x1 is a full 50w gmrs transceiver that supports options such as display synchronization, microphone gain control, the ability to alter channels on the fly without the need for software, and a few others. Ive been producing these antennas professionally for nearly a decade now and have sold over 15000 units. The mxt400vp3 bundles a long range twoway radio with a high powered antenna system. Ive taken what i learned from the gmrs continue reading homebrew 5 element vhf yagi. Free online engineering calculator to quickly find the dimensions of a hb9cv antenna.
It is inversely proportional to the frequency which means the wave with higher frequency will have shorter wavelength. I really dont want to buy or install 2 antennas on my 2 seperate base stations. Diamond antenna v2000a tri band base antenna 6m2m70cm sort by. Gmrs antennas using these frequencies must remain under 200 ft altitude. The general mobile radio service gmrs is a licensed radio service that uses channels around 462 mhz and 467 mhz. Getting the most from your personal radio, murs or frsgmrs. Lowpower frs gmrs uhf radios with a fixed antenna are only reliable from onehalf to one mile in average urban terrain. This is a full power, full compliance, part 95 certified, gmrs transceiver.
In fact, its the most powerful gmrs radio made by midland. The manufacturer has a strict minimum advertised price policy for this item. Therefore, we continue to deliver power and innovative solutions with extreme range devices like our mxt, gxt, and xt series. Parabolic antennas have the most gain and mainly used for uhf and uplink purposes. For these frequencies, the calculator suggests using. If you have no particular preference within a given ham radio band, then simply enter its center frequency i. Enter the operating frequency use your mouse to clear the window then enter your frequency. A upgrade to 6db, which translates to further range.
It is meant for the serious commercial user, sar, react, go box, or camper. Midland mxt100 40mile micromobiletm fixedmount gmrs. The n9tax slim jim antenna is the highest quality roll up antenna available today. Yagio runs under windows 2000, xp, vista, win 7 and likely win 8. Currently i have a homemade uhf omnidirectional on a kenwood tk8180 and im not 100% satisfied with the antennas. Dual band murs gmrs slim jim antenna with 16 or 10 rg58. Here is a simple antenna calculator for two popular forms of ham radio hf wire antennas. Motorola hkae4004a 440495 mhz antenna for slr repeater. I am a ham operator and soon plan to get my gmrs license. If anyone could direct me in the direction of a web site or plans i would greatly appreciate it.
Going the distance with 5 watt walkie talkie radios. Getting the most from your personal radio, murs or frs gmrs. Antenna calculator for hf antennas ham radio secrets. Yagio is similar to lpcad, it uses keyboard commands instead of a mouse menu. There are usually four radials, three being a minimum, but you could use up to six. Installing a good external antenna will give you the fange you need to keep everyone in. This link is listed in our web site directory since monday may 16 2005, and till today gmrs jpole antenna has been followed for a total of 9167 times. These antennas can easily be built for uhf or above by using a chassis mount n type or so239 connector, some solid wire and solder. After a couple of failed yagis and the help of another ham on forums, i finally built a yagi that works. Better yet, buy a pair of gmrs radios with removable antennas and more power, then you can put an antenna as high as 20 taller than your house as long as its connected to your house.
Free radio frequency software, antenna design and calculators. Browning 450mhz470mhz land mobile fiberglass omni base. Gmrs jpole antenna uhf radio 462mhz saturday, april 28, 2012. As a result, we cannot show the price in catalog or on the product page. Free online engineering calculator to find the dimensions of a yagi uda antenna for a given frequency range and length. I started with calculations available online for the frequency i wanted to target, in my case 462mhz. Low swr on gmrs and good receive and transmit range. Online calculator hb9cv antenna calculator changpuak. I decided on a 3 element yagi built for gmrs that is directly fed with 50ohm coax. Dual band murs gmrs antenna body approx 5 in length.
Visit the baofeng site to learn, buy, and get support. Line of sight calculator technical discussion mygmrs. Antenna rf safety calculator squelch settings baofeng. An extensive comparison of 31 different antennas was performed by mike w9mdb. The useful direct range of a twoway radio system depends on radio propagation conditions, which are a function of frequency, antenna height and characteristics, atmospheric noise, reflection and refraction within the atmosphere, transmitter power and receiver sensitivity, and required signaltonoise ratio for the chosen modulation method. This calculator can be used to design a quarter wave ground plane antenna, with radials. The world of twoway radios is full of acronyms and they can start to feel kind of overwhelming if you arent super familiar with the ins and outs of radio frequencies, citizen bands, and megahertz. Part of our mission is to provide you with the reliable communication tools you need to go further off the beaten path. Be prepared and able to communicate in case of emergency with the largest selection at. The most common use of gmrs channels is for shortdistance, twoway voice communications using handheld radios, mobile radios and repeater systems. Due to material, i decided on a 5 element yagi built for vhf since all i would have to buy is more 38.
Looking for a base antenna with some gain, that will cover ham and gmrs. The distance between one point to another adjacent point in a wave is known as the wavelength. Online calculator dimensions of a discone antenna changpuak. Tv antennas free delivery possible on eligible purchases. Using the new tlw software bundled with recent editions the arrl antenna book. I could not find any published formula for them but only sample antennas. Values for antenna height above average terrain commonly abbreviated haat can be calculated using this form. Buy browning 450mhz470mhz land mobile fiberglass omni base antenna. Line of sight calculator posted in technical discussion. The mxt400 can be quickly installed almost anywhere in a vehicle using the included mxta23 antenna.
Discover the btech mobile gmrs 50x1 50 watt gmrs twoway radio, gmrs repeater capable, with dual band scanning receiver 6174. Free online engineering calculator to quickly estimate the geometric size of the parts of a discone antenna. Replaces a included stubby antenna with more db gain. So far best i have found is really good on ham and 2. Now its time to step it up just a little bit and fabricate a bigger antenna. Design your vhf yagi antenna online, a javascript enhanced web page that implements the design of an antenna in the vhf, uhf by k7mem. Using globe, haat values can be calculated for any location on earth, given coordinates and an antenna. Antenna, ve3sqb ham radio antenna design software programs.
Radio line of sight calculator for use on vhfuhf ham bands. Everything you need to know about gmrsfrs, but were. Whats the difference between family radio service frs band or the general mobile radio service gmrs. You could probably just use a good 70cm ham antenna as 5% is a fairly small change in operating frequency but shortening all dimensions by roughly 5% should give you a good gmrs yagi. I am looking for plans to build a home brew yagi 4 or 5 elements for the gmrs center freq. This will not allow you to calculate around hills, metal and thick vegetation. There are copies for slightly less, but bought this oem version to compliment a gmrs midland micro radio mxt275, purchased at the same time.
David fluckiger, kj5at antenna design and software from g4fgq. Antenna designing software instructions to build a beam for 40 m band, uhfshf antenna design, antenna design article collection, yagi. This means 22 frs gmrs channels plus 8 repeater channels. Height is your best friend when using gmrs bubble pack radios.
Buy browning 410mhz490mhz uhf fiberglass land mobile omni base antenna. Im using this antenna on the transmit side of my dual antenna gmrs repeater. It is working fine and actually does seem to have a bit of gain compared to the 14 wave ground plane antenna it. Coax center conductor attaches to the long section feed point. Since ive built a ton of jpoles and wire antennas, ive wanted to build something different. Of course this calculation assumes the receiving antenna is laying directly on the. Antenna height above average terrain haat calculator. Verticals covers all the common types with a coil calculator built in for the antennas that require themthe quagi may be the best of two worlds. Buy midland mxt100 40mile micromobiletm fixedmount gmrs 2way radio with magnetic mount antenna consumer electronics.
The quarterwave impedance transformation calculator is used to match an input and an output impedance at a given frequency for maximum power transfer. The gmrs jpole is tuned for maximum performance on the 462 467 mhz general mobile radio service and uhf public safety band. Hello all, im not to the gmrs hobby and im on the hunt for a uhf antenna for gmrs. One important factor that is missing is wattage of each. Use these antenna design software to design and analyze antennas of. Radio antennas free delivery possible on eligible purchases. This covers you and your immediate family and was previously only valid for 5 years.
Twoway systems operating in the vhf and uhf bands, where many land. High gain antennas which one is best for gmrs uhf frequencies and the pros and cons to both. It has the yagis gain and the quads direct feed and signal capture. The micromobile gmrs radio boasts 40 watts of broadcasting power with 65 mile lineofsight range.
This calculator assumes nothing is in the way of the radio signal between the antenna and the horizon at a chosen height above ground. About gmrs jpole antenna the resource is currently listed in in a single category. Wez 26cw1 and jake 26cw128 build another 14 wave antenna for the pmr446 band. Additionally, the gmrs authorizes the use of seven intermediate or interstitial frequencies, as shown in. Just give it a coat of clear coat, and it should last a long time in the elements. This calculator will help you to calculate the different wavelength of antennas. The list will grow with your help so lets start and share the knowledge. Here is antenna design software to meet your needs. The main category is j pole antenna plans that is about building jpole amateur radio antennas. The following is a line of sight calculator for both vhfuhf. Hf dipole antenna this antenna software will help you design a simple wire dipole.
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