With the development of transistor technology in China, it is possible to replace the heavy tube radio station with a portable transistor radio station after the transistor 708 artillery FM radio station (A2 1X series radio station) is equipped with troops. Compared with the A2 1X series artillery radio with electron tube, the 70X series artillery radio with transistor is much lighter. At the same time, according to the different use environment and specific purposes, Tianjin Radio Power Plant has also produced different models of 70X gun radios with the same appearance and different working frequencies, and its power supply and high-frequency components can be interchanged. The specific models of this series of radio stations are as follows: 705 working frequency: 36.0-46. 1MHZ for wireless communication between infantry regiment and artillery regiment 708 working frequency: 28.0-36.5MHZ for wireless communication between artillery battalion and artillery company shooting network 709 working frequency: 2 1.5-28.5MHZ for wireless communication between artillery battalion and artillery company shooting network. Working frequency: 20.0-26.0MHZ is used for the coordination of artillery and tanks, and its working power is 1.5W (I (an amateur radio operator) use random vertical antenna. When the transmission conditions are good, I can call thousands of friends on 29.6MHZ with Radio 708. When the communication conditions are not good, you can only call your friends in the same city. ) weight 13KG. This series of radio stations has been continuously improved in the process of use, and three series have been developed, namely 70XA, b and c, of which c has the best machine performance, b is very common, and a is a little rare. Type number: working frequency: 28.0-36.5MHZ, maximum power: 1.5W, communication distance: 1000KM, combat quality: 13KG, power supply voltage: 24V, equipment level: transistor 884 infantry FM radio (commonly known as "884") After the aircraft was finalized in the early 1970s, it was jointly produced in Hubei/Anhui/Jilin, so the equipment was huge, and a considerable number of 884 radio stations assisted the Vietnamese People's Army. Therefore, in the Sino-Vietnamese War of 1979-88, the grass-roots combat troops of both sides used the same type of tactical radio, and they often launched an invisible front-confrontation on the radio. Hubei/Anhui/Jilin in China all produce 884 radio stations. The difference between them is that the external link of the 1.2m vertical antenna used in the 884 radio station produced in Jilin is made of aluminum alloy, while that produced in Anhui/Hubei is made of engineering plastic. The disadvantage of 884 FM radio station is that the machine will be overloaded when receiving strong signals, so the manufacturer has improved this aspect, so the 884A infantry FM radio station was finalized. The appearance of these two radio stations is the same, but the internal circuits are a little different. The 884A radio station has an "A" steel seal mark in front of the fuselage number. The working frequency of this machine is 45-50MHZ, which is continuously adjustable and can be used for simple constant amplitude report. Weight 10KG. Radio working power: 0.75W W What you are seeing now is the picture of transistor 884 infantry FM radio station. The cover plate on the panel can be covered. The antenna can be adjusted at will. The rubber button in front of the antenna column is the equal-amplitude report key of the machine. The frequency of transistor 884 FM infantry radio station is 45-50MHZ, which can actually reach: 44 44-5 1MHZ, while the frequency band allocated to amateur radio stations is 50-54MHZ, which is the so-called "6m" frequency band. As can be seen from the frequency index of this radio station, this radio station only covers the edge of amateur radio frequency, and the operators of amateur radio stations generally choose the middle part within the legal frequency band. Moreover, most amateur radio operators use AM voice/telegraph mode in this meter band, and the machine works in FM voice mode, so it is impossible to contact and communicate from the principle of radio waves. There is only one possibility, that is, the other party also uses FM machine, and the frequency is on your frequency, so you can communicate, but it should be noted that the radio station is only 0.75W W W. In the magic belt of 6 meters, your call will definitely be received by ham in the same city but also in Europe or other regions. ) But the communication time will be shorter. The radio 884 is currently used to listen to local FM broadcast signals of certain frequencies and conversations between the master machine and the slave machine. Transistor 86 1A artillery FM commander (also known as "86 1 platoon leader") usually has one gun per shift, and the artillery company command post sends commands to various artillery positions by telephone/command/remote command, etc. The first two methods are inconvenient in practical use, so the best way is to directly establish an artillery command communication network to convey orders. In the past, the radio station on the artillery position needed special personnel to operate, but it could not be supported in time when the artillery battle was fierce and there were staff reductions on the artillery position. Therefore, the earphone and throat telephone operator are integrated in the developed gun position radio, thus completely liberating the operator's hands. Speaking of 86 1A radio station, we should first say that 86 1 gun station adopts thick film circuit (integrated circuit primary).