A lot of people have asked the question about buying a walkie-talkie, but no one has come to sort it out systematically, so it doesn’t seem to the extent that everyone on earth knows it. For several issues that need to be considered before purchasing the machine, I have tried to sort it out. If there is something wrong, I would like to trouble you to correct it, and hope that it can be a reference for friends who are preparing to purchase the machine.
1. Several factors to consider when purchasing a walkie-talkie
Whether it is a arduous field crossing or leisure skiing, horseback riding and other activities, a walkie-talkie is the best way to keep in touch with the team . And the particularity of field activities has put forward some special requirements for our purchase, among which the key considerations are:
1, power supply
2, frequency compatibility< /p>
3, operability, waterproof and shockproof
4, power
1, choice of power source
Common walkie-talkie power sources are: lithium rechargeable batteries, nickel-metal hydride rechargeable batteries, and AA alkaline batteries. It is generally impossible to charge in the wild, so the standby time and talk time of the walkie-talkie are a relatively important parameter. Otherwise, problems often occur due to insufficient power of the walkie-talkie when communication is most needed. Generally speaking, the power of the walkie-talkie powered by lithium batteries and nickel-metal hydride is relatively high, but the backup battery is a big problem; the power of the walkie-talkie powered by alkaline batteries is generally less than 2W, but it is still possible to carry dozens of AA batteries.
2. Communication frequency
The relationship between communication frequency and radio communication is as inseparable as road and car. There are two main sources of common walkie-talkies: those brought back from abroad; and civilian walkie-talkies purchased from regular domestic stores. Although they all communicate in the UHF frequency band, due to the difference between domestic radio frequency band management regulations and international standards, the communication frequencies of these two types of walkie-talkies are also very different:
The frequency of domestic open civil walkie-talkies Point: (power below 0.5 watts, can not be programmed to change the transmission frequency)
frequency center frequency
1. 409.7500 MHZ
2. 409.7625 MHZ
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3. 409.7750 MHZ
4. 409.7875 MHZ
5. 409.8000 MHZ
6. 409.8125 MHZ
7 . 409.8250 MHZ
8. 409.8375 MHZ
9. 409.8500 MHZ
10. 409.8625 MHZ
11. 409.8750 MHZ
12. 409.8875 MHZ
13. 409.9000 MHZ
14. 409.9125 MHZ
15. 409.9250 MHZ
16. 409.9375 MHZ
17. 409.9500 MHZ
18. 409.9625 MHZ
19. 409.9750 MHZ
20. 409.9875 MHZ
FRS (Family Radio Service) home radio frequency band in the United States: (power below 0.5 watts)
frequency center frequency
1 462.5625 MHZ
2 462.5875 MHZ
3 462.6125 MHZ
4 462.6375 MHZ
5 462.6625 MHZ
6 462.6875 MHZ
7 462.7125 MHZ
8 467.5625 MHZ
9 467.5875 MHZ
10 467.6125 MHZ
11 467.6375 MHZ
12 467.6625 MHZ
13 467.6875 MHZ
14 467.7125 MHZ
It should be noted that the power of civil walkie-talkies in China is limited to less than 0.5 watts, otherwise it will be necessary to go to the local The Radio Regulatory Commission of the People’s Republic of China applies for an amateur station license to legally own a high-power station. (For friends of Lvye, you can contact the golden monkey and apply to join the ranks of Lvye HAM). In foreign countries, walkie-talkies with more than 1.5 watts often require an additional application for a GMRS (General Mobile Radio Service) general mobile radio license before they can be used legally. The frequency of GRMS is different from that of FRS. Therefore, when purchasing a walkie-talkie abroad, it is also necessary to consider whether it can communicate in the FRS frequency band.
3. Operability, waterproof and shockproof
Maybe you are now considering buying a handheld radio. The hand-held radio can change the transmission frequency point, has a complex scanning function, and has a large transmission power, but one thing is its weakness: easy to operate. Just like the imported VCD machines with extremely complicated menus in our home, in fact, after a long time, it is found that the commonly used functions are still well done by those domestic machines. The biggest advantage of walkie-talkie VS handheld radio is that it is easy to operate, and professional walkie-talkies often have simpler panels and can be learned to operate in 5 minutes.
Due to the harsh field conditions, the waterproof and shock-proof functions of the walkie-talkies should also be considered. Just like the Rocky Pannel and the military use standards emphasized by some walkie-talkies, it is actually very practical for Oz. After all, we have to spend as much time as possible in the wild to take care of ourselves rather than those delicate equipment.
4. Power
In the case of straight line without obstacles, the power of the walkie-talkie is basically proportional to the communication distance. The straight-line communication distance promised by 0.5W walkie-talkies is generally about 3.2 kilometers, and 2W walkie-talkies are 9-10 kilometers (this distance will be greatly reduced in the valley). High power will bring about the problem of large power consumption, so it is best to consider the situation you may encounter and the expected communication distance when purchasing a machine.
Second, some suggestions for Green Wilder to buy walkie-talkies
Now Green Wild does not have a set of protocols for communication in the field, but with the radio With the popularization of knowledge and the improvement of the level of equipment, it is only a matter of time before this protocol is launched. Due to historical reasons, there are many walkie-talkies in the FRS frequency band in the hands of the Green Wilderness, and as Motorola starts to produce low-priced civilian walkie-talkies in China, there will definitely be more and more domestic civil frequency walkie-talkies in the future. Therefore, for a long time, the field radio communication of Greenfield will be FRS walkie-talkies, domestic civil frequency walkie-talkies and dual-band mobile stations coexist. I tend to encourage everyone to buy more domestic civil frequency walkie-talkies in the future.
I think there will be several types of users:
1. I need a communication tool that is easy to operate, lightweight, and has a communication distance of 3 kilometers under non-adverse conditions: domestic ones are recommended Civil walkie-talkies, such as T6200C.
2. I need a long communication distance, a communication tool suitable for long-term use in the field: 2W walkie-talkies of FRS/GRMS type are recommended, such as Talkabout Distance DPS is a very good walkie-talkie; or 420-470MHZ The single-band mobile station, the price is good, but the power supply problem may be annoying.
3. I am not afraid of complex operations and professional knowledge, and I am interested in field communication experiments: join the ranks of Lvye’s HAM, and buy a suitable hand-held device (another money-burning hobby….^___^ )