How to improve the communication distance and effect of hand-held walkie-talkies? The following suggestions are arranged according to the convenience and use cost:

1

Increase the transmission height:

There is a very fashionable saying in the amateur radio circle: "Height is everything!" Practice has proved that this is a truth that has not been tried. When everyone bought a handstand, they all saw such an indicator: the communication distance is 3-xx kilometers, which refers to the communication distance in the open ground. And what if you stand on the top of Beijing's Fragrant Hills with a handstand? The truth is that you can still communicate with your friends on high-rise buildings in Tianjin! Amazing, that's the role of height. So if your home or unit is on a higher floor, congratulations! Don't waste this precious resource!

2

Select the communication environment and direction:

Select the communication environment and direction is very important, sometimes it will make a big difference in communication quality. In general, we should follow the following principles:

A, try to choose a higher terrain link, for example, if you can link on the second floor, don't link on the first floor.

B, try to choose outdoor communication, because the building wall reflects and attenuates 70 centimeter waves very much.

C, try to avoid the residential areas surrounded by buildings, the old city is arranged with high density of buildings, the places with dense trees, under the high-rise buildings, the road sections surrounded by large cars, under the tunnels and bridges, and in front of large metal billboards.

D, Use of Urban Canyons: This is very important. Our big cities are lined with high-rise buildings and dense buildings. It is difficult to find real sight distance communication opportunities. Therefore, we must make good use of the existing environment. The so-called urban canyon refers to the two sides of the building dense, tall, wide road bend small trunk road. Even on the same road that intersects with it (e. g. vertical and oblique sections), the effect of communication is generally better. On the contrary, if both sides of the communication are in an intricate path or complex of buildings, the communication effect will be poor. Therefore, we propose that if you are going to get connected while driving, please do not start until you enter the wide road.

E, choose the right direction and try to avoid the shelter of tall buildings and metal bodies between the points connected with you. If you place it behind the direction of your communication, it can also act as a signal reflector.

F, night communication is better than day communication.

G, fixed-point communication is better than mobile communication.

3

Improve Receiving Sensitivity:

I don't think I need to explain much. If both sides improve receiving sensitivity, it is equivalent to increasing the transmitting power for the other side. Please don't tell me that you can't adjust the receiving sensitivity of the radio station, this is in the manual.

4

uses a high-gain transmitting antenna:

The efficiency of the antenna is expressed in terms of gain, and different types of antennas have different gains. Generally speaking, the dedicated extended handstand antenna (commonly known as small whip antenna) is better than the original handstand antenna (gain about 2.15DBi), the vehicle antenna is better than the small whip antenna (gain 5.5-6.5DBi), the rod antenna is better than the vehicle antenna (gain 6.5-12DBi), and the multi-element unidirectional antenna (such as Yagi antenna, logarithmic periodic antenna, loop antenna, etc.) is better than the rod antenna (gain 9-24DBi).

Yagi antenna

It is strongly recommended that friends who are connected in the car use the car antenna. You know, every 3DBi gain is equivalent to doubling your station's transmit power. At the same time, it avoids the signal shielding of your handstand in the car and the radiation to the human body in the car.

It is recommended to use a stick antenna for hams that are set up at home. It has high gain, high strength and easy installation. With the height installed on the roof, it is not a problem to cover Quanzhou, and some can communicate with Xiamen, Putian and other places.

5

Increase Transmitting Power:

Some students can't help asking: The power of my handstand has been fixed when I bought it. How can I increase the power? In fact, there are still some ways:

A. The transmitting power of the handstand is related to the voltage and capacity of the battery. When it is fully charged, the transmitting power is high, otherwise it is small. Most of the time, our handstand is working in a state of dissatisfaction, so we recommend that you use lithium batteries, which can be charged at any time to ensure the maximum transmission power.

B, some models of handsets can set the transmission power by themselves, and can set the transmission power higher than 5W.

C, some radio stations can use external power supply (Ni-MH battery), which can ensure the transmission power of the hand station to the maximum extent.

If the input voltage of the external power supply is increased (higher than the nominal voltage of the battery but lower than 13.8 volts), the nominal transmission power of the handstand can be increased. However, this method is recommended that students use it carefully. If the call time is too long or there is no proper heat dissipation measures, it is easy to burn the power amplifier module.

6

With the help of repeater station:

The so-called repeater station is a kind of relay station set up at the commanding height and uses uplink frequency to receive radio signals with different strength at scattered points and convert them into power transmission such as downlink frequency. It can be composed of two radio stations, one power supply and corresponding control conversion circuits. The armed police, public security, transportation and other departments are using this relay station to ensure that users have no blind spots and high-quality communications.