A pleasant life in a courtyard

Chapter 442 Unintentional intervention
When many military products are designed, they are often not originally intended for military use.

In most cases, it is just for civilian use.

Just like the color TV project that Li Xiang has been busy with for several years, the signal part involves the construction of signal towers.

Unexpectedly, a handheld radio walkie-talkie was developed.

Radio walkie-talkies are actually not uncommon, and handheld ones are not uncommon either.

As early as 1940, during World War II, the American Calvin Manufacturing Company (later Motorola) developed a portable, battery-powered voice radio receiver/transmitter, named SCR-300, for use by the American infantry troops. Use in the wild.

Later, due to its excellent applicability, it was quickly channelized and moved to tanks and artillery.

Although the SCR-300 is a relatively large backpack-mounted radio rather than a handheld one, the SCR-11 is described in War Department Technical Manual TM-242-300 as "primarily intended for use as an infantry walkie-talkie," hence the term The "walkie-talkie" was put into use for the first time.

This walkie-talkie also became a key piece of equipment during the Normandy invasion and the Italian campaign, playing a decisive role in containing the assault.

Subsequently, armies of various countries began to use such equipment.

Some were seized from the Kuomintang troops, and some were purchased from the Soviet Union. They ranged from military divisions to battalions and companies, and they were all diverse and unsystematic.

The appearance and function are based on the latest model 611 walkie-talkies seized from the U.S. Army.

The backpack battery that was originally required was reduced to the earpiece.

Due to our limited radio technology at the time, this product was not widely used in the war.

A few years later, a prototype of Big Brother was developed.

The U.S. Army has complete radio stations from the regiment level to the platoon level, which can call for fire support from the Air Force at any time.

Under such severe circumstances, independently developing a series of strategic and tactical military radio stations to support the front line became the number one task assigned to electronics companies by the superiors at that time.

That is the prototype of Big Brother.

The number of casualties in the early days of the war was shocking.

Although it is much weaker than its predecessor in terms of functionality, its portability alone is enough for it to have a place in the army. .

The walkie-talkie called 701 soon came into being.

In the early days of my country's Korean War, due to strategic layout, radio support was greatly needed.

Not only was the call duration shortened a lot, but the signal range and call quality were not only no better than those of the previous phone, they were also much weaker.

In order to develop a communication radio station in the shortest time, the leader, Deputy Director Wang Shiguang, organized Tianjin Radio Factory (Factory 712) and Nanjing Radio Factory (Factory 714) to jointly study a series of radio tasks from the military division level to the battalion and company level.

However, after the size of the walkie-talkie is reduced, the side effects are also obvious.

The radio equipment equipped in the army at that time did not even have a unified standard.

Walkie-talkie models also began to be gradually updated, but the replacement content at that time was mainly focused on the receiver.

Moreover, only troops above the regiment level have a small number of radio stations. Battalions use wired telephones. Below the battalion level, communication mainly relies on bugles, whistles, flares and flashlights, which seriously affects combat effectiveness.

Its radiation range is only one kilometer, and it must be in an open area.

In this way, it is undoubtedly much more convenient to carry, and the two-person radio team originally equipped can also free up one manpower.

And because the circuit is relatively complex, the technical difficulty is very high.

There are also many quality problems with the products, especially the plastic transceiver switches, which may suffer from poor contact or even breakage.

Although the finished product of 701 is not ideal, its birth is not without effect. Soon, the second-generation model optimized on its basis, the 702 step-talking machine, came in handy.

The R&D personnel learned from the lessons of the first generation and returned the reference function to the early model of walkie-talkie SCR-300.

With everyone's unremitting efforts, we finally successfully developed a small and portable walkie-talkie with small size, light weight, low output power, low power consumption, whip antenna, and a communication distance of more than 15 kilometers.

It is also used to mainly equip battalion and below (company and squad) troops.

For many years after this, the country's radio technology slowly improved on this basis.

Countries around the world have not heard of any dramatic breakthroughs in this technology.

It was not until the early 1970s that Motorola gave the concept of a signal base station and the concept of portable "telephone" to the walkie-talkie, officially launched.

At that time, Li Xiang was working on a color TV project.

Li Xiang's "No. 1" walkie-talkie, which was also born based on the signal base station, looks like a classic walkie-talkie from later generations.

Not only is the appearance more novel than existing models, but its functionality and operation far exceed existing technology.

First of all, in terms of operation, Li Xiang considered that since it was designed to be portable, on the basis of equipping everyone, the literacy level of the combatants must be taken into account.

We strive to design a fool-proof operation design that even illiterate people can learn in one go.

Coming to functionality, Li wanted to come up with a very innovative and bold concept at this time.

That is the multi-person calling function.

Yes, if we compare the latest walkie-talkies available to Li Xiang at this time.

On the contrary, his one is more in line with the "concept of portable phone".

Originally, according to his plan, when signal towers were gradually installed in various places and the projects at hand were busy, he was going to start researching the local calling function of PHS.

When the beautiful country has its big brother, we, the flower growers, will put PHS on the shelves, and everyone will have their own beautiful lives.

It's a pity that God's calculations are not as good as those of humans. Li Xiang never expected that the first official appearance of "No. 1" would be used to rescue a major earthquake.

Li Xiang, who was nowhere to be found, rushed back to the unit immediately after clarifying his thoughts, and mobilized all project personnel to come to the unit to report.

In less than two hours, truck after truck followed the large army, including people and belongings, and headed towards Tangshan.

At this time, Li Xiang, whose mind was running at high speed, didn't realize that he didn't even leave a message to his relatives and friends.

In the unit, everything they brought was classified as confidential.

When Li Xiaodi came to inquire as a family member, he did not reveal any information.

In the end, relying on Sun Guoqing's family background, he was able to find clues from the army.

The family members breathed a sigh of relief, as long as everything was okay.

Only Sun Guoqing and Gao Weicheng exchanged vague glances.

They both have hidden worries in each other's eyes.

The specific news there has not been announced yet.

People only know that there was a big earthquake, but they don't know what kind of disaster it caused.

(End of this chapter)