First of all, it should be clear that the procurement should be carried out according to their actual needs, while taking into account their own procurement capabilities and product prices, performance, etc.
Secondly, generally speaking, the radio stations you buy now basically refer to the radio stations with the frequency in the U band (400MHz~470MHz), which is used by amateur radio amateurs all over the world. Moreover, the transmitting antenna is not very long, so it is easy to carry or install. The other frequency band is the V band, which is around 144MHz, but because the antenna is relatively long, it is not suitable for car radio.
Generally speaking, for people who drive often, they basically choose a car radio, commonly known as a car radio. Its advantage is that the transmission power is large, generally above 20W; On the power supply; the operation is simple, generally made into a channel type, and each channel is preset with a fixed frequency value; People, hand-held walkie-talkies (commonly known as hand-held stations) are also a good choice. It is characterized by small size and easy to carry, that is, it can be used in the car or carried with you, for example, to communicate with other people when climbing a mountain. Another advantage of the handheld radio is that its function is generally stronger than that of the car radio. For example, its receiving frequency range can range from 0.5MHz to 999MHz or even more, while the frequency range of the car radio is basically very narrow, such as ours. The johnson train used now has a frequency range between 430MHz and 440MHz.
Things have two sides, and there are advantages and disadvantages. The disadvantage of the station is the advantage of the walkie-talkie, and the advantage of the walkie-talkie is naturally the disadvantage of the station. Of course, it is better to have both a hand and a car, but it costs more.
If you only want to use it to communicate with the cars before and after the convoy, and at the same time when traveling, you can generally use the walkie-talkie; If you want to communicate with people far away, you can only use the radio, because its transmission power is very large, and the performance of the antenna (reception sensitivity, transmission efficiency) is better than that of a handheld radio.
Because of the high transmission power of the station, then what you say can be heard by others in a large range, and it becomes a broadcast. This is not suitable for some private words, of course. You can buy one that has adjustable transmit power.
The advantage of the handheld radio is that it is easy to carry. Last week, we went to the White River Canyon, and each car used Yaesu’s VX-1R walkie-talkie with a transmit power of 0.1W, which is enough for team communication, and the words are also good. It won’t let other people hear it, so it’s easier to talk about more personal topics. When going up the mountain, take the walkie-talkie with you, and people with different climbing speeds can chat at the same time.
The walkie-talkie can also use the car’s antenna in the car, and the effect is much better than using the rubber antenna it brings, so it is dual-purpose, and can be used as a low-power car in the car. , and can also be used with you.
It is said that some people have a car station and a walkie-talkie. When they accompany the leader to go shopping, the leader takes the walkie-talkie to go shopping, and he sleep
s in the car until the sound of the leader asking him to pay is heard on the radio. , he woke up, huh, huh.
The above is just a brief description of the selection of radio stations. According to each person’s requirements, it is best to find someone who understands to be a staff advisor before purchasing, and you may choose a radio station that suits you. .
Radio is an amazing thing, and if you get into it, it fascinates you. At the same time, it is very technical and difficult to learn and use.
It is important to note that frequency resources belong to the state. Equipment that uses transmitting power such as radio stations must be approved by the relevant state departments. Private use of these equipment is strictly prohibited. Violators may be subject to heavier criminal penalties. Remember that before the end of the Cultural Revolution, private radio stations may be convicted of counter-revolutionary crimes. The current law seems to be called the crime of setting up a private radio station. For amateurs, they must first apply to the relevant departments, and only after obtaining the corresponding approval can they carry out activities such as radio station and communication, and at the same time, they must abide by relevant laws and regulations during the activities.