Li Minghua asked suspiciously: "Commander, don't you want the two of us to develop a radio?" ”

Seeing Song Zhewu nodding with a smile, Li Minghua said a little anxiously: "But what our Fourth Route Army needs most at present is to apply our technology to the military, as the commander said, 'Let the Fourth Route Army see, hear clearly, and fight accurately.'" ”

Song Zhewu said: "Minghua is right, our Fourth Route Army really needs electronic technology applied to the military. However, there are three reasons why I cannot tell you right away about the direction and tasks of electronic technology research in military affairs. ”

Seeing Li Minghua's anxious appearance, Song Zhewu continued: "First of all, our scientific research strength is insufficient, although we have you, a big doctor, and Lao Cui, an excellent engineer, but there are only two of you, and many things cannot be done by the two of you yourself, at least you need some assistants, and what we need is not one or two electronic military technologies, but a large number." In this case, your strength is very insufficient, and we need to add a lot of manpower. Your students, it is not possible to help you right now, they need time to study; Second, these electronic technologies for military purposes are strictly secret, and some necessary experiments must be carried out outdoors, and our current conditions cannot guarantee that these secrets will not be leaked. And the most important point is that, as Lao Cui said, we don't have our own electronics factory, and even if you are developing advanced electronic military technology, we can't equip it in large quantities. On the contrary, if other countries get the results of your research, with their industrial capabilities, they will be more equipped than us, and may even be more advanced, then it will not only be not so simple as doing us a disadvantage, but it will cause us great irreparable harm. ”

Li Minghua lowered his head and thought for a while, and said to Song Zhewu: "The commander is right, on the one hand, we must pay close attention to cultivating and recruiting outstanding talents in electronics; On the other hand, we should step up the construction of our own electronics factory. ”

Song Zhewu nodded approvingly and said: "Yes, we must continue to pay close attention to recruiting and cultivating talents, especially the students you are bringing now must be trained, we must build an electronic factory, and now you can start this work, such as the electron tube factory." We can't build the equipment needed by the factory ourselves, you can put forward a list, and I will arrange to buy it abroad. ”

Song Zhewu looked at the two of them and said, "There is one more thing that needs to be done immediately, and that is to build a small radio factory immediately." Now this superheterodyne circuit has been formed, but it still needs to be improved, your current radio surname can be very good, you will step up the improvement and perfection, and then I will send someone to apply for a patent abroad. My opinion is that our radio should mainly make more efforts in receiving, detecting, gaining and improving sound quality, and the purpose is to have more sensitive reception ability, stronger detection effect, and less distortion sound quality than the current foreign radio products. If our radio factory is put into operation, it can not only earn us the funds we urgently need, but also train a group of skilled workers with certain electrical knowledge for us. Even your students get a lot of exercise. When we have the conditions, we will expand production on a large scale. ”

After listening to Song Zhewu, they suggested that they put more effort into 'receiving, detecting, gaining and improving sound quality.' Cui Hao was very surprised and asked Song Zhewu: "Commander, you also understand electronic technology?" ”

Song Zhewu reluctantly continued his "lie", trying to hide his inner uneasiness, and said with a smile: "I just know some electronic knowledge, and I don't understand too specific technology." ”

After speaking, Song Zhewu hurriedly took out a cigarette, took the opportunity to light a cigarette and touched his slightly hot cheeks, and after smoking a cigarette, his mood was completely calmed down.

Cui Hao didn't notice Song Zhewu's uneasiness, and said with admiration on his face: "The commander is too modest, I heard Minghua say that although the commander is a soldier, he is very familiar with the development of science and technology today, and there are many forward-looking ideas that are very insightful. The commander's prediction of the development of electronic technology is also very admired by us professionals! Today, there is probably only one commander who can have such insight, and Minghua and I have benefited a lot today. ”

Song Zhewu hurriedly smiled and shook his hand and said, "Old Cui, don't praise me like this, otherwise my face will be feverish." ”

Cui Hao said seriously: "Commander, what I said is true, at least the generals in the country will never have the insight of the commander." ”

Cui Hao paused for a moment and said: "Since I came back from abroad, I have been working at the Hankou Telegraph Office, so I have some research on communication systems, and broadcasting is also a kind of communication, but it is a one-way transmission, and it transmits audio signals. I also have an imported radio, which I left at home when I left Hankow, and that radio was improved by me, and it worked very well. I agree with the commander that the improvement of the radio is mainly to work reception, detection, gain, and sound quality, and if these aspects are done well, our radio will be a very good radio. ”

Then he said with some regret: "It's just that we have to produce radios, and we can't make much money for the time being." The most expensive part of a radio is the tube in it, the cost of the radio is half of the tube, and we can manufacture other components ourselves, but the tube must be bought before we have our own factory, and they are all imported. Now, even if we design a high-quality, modern radio, our radio will cost a lot. At this cost, we have no problem selling in China to make money, but our domestic market is not large, and now the people who can buy radios are the rich people in the cities, and no one in the rural areas is willing to spend money to buy them. However, if you sell it abroad, you won't make much money with the freight. ”

"It's true." Song Zhewu also agrees with Cui Hao's opinion.

Because of the shortcomings of large volume, high power consumption and easy breakage, in addition to some high-fidelity audio equipment in later generations, various other electrical equipment are not using it, and it belongs to the electronic components that will soon be eliminated.

Its principle is actually not complicated, but it is a little troublesome to manufacture, at least the vacuum-sealed glass tube is not easy to make. Song Zhewu really wanted to let Li Minghua and Cui Hao develop transistors now, and the silicon and germanium used to make transistors can be found in Shanxi, not to mention silicon, the second most abundant material on the earth, and even Song Zhewu knew that its crystals were obtained by carbon reduction in electric furnaces, and high-purity silicon was made by hydrogen reduction. Germanium exists in coal mines, silver mines, copper mines, these kinds of mines are available in Shanxi, although the coal mines in Shanxi are not as much as in later generations, but Shanxi has coalfields, and you can dig as much as you need.

If Song Zhewu told Li Minghua and Cui Hao the principle of transistors, Song Zhewu absolutely believed that they would soon make it in the laboratory, but it would be difficult to make it on a large scale, because Song Zhewu did not have a decent industrial base. As soon as the transistor came out, it immediately attracted the attention of various countries, and with their complete industrial system and strong scientific and technological strength, it will soon be used on a large scale. Especially for himself, if they had mastered transistor technology before World War II, it would definitely be the worst outcome that Song Zhewu did not want to see. In Song Zhewu's memory, when experts and scholars in various countries were still questioning transistors, he said that he took the lead in manufacturing the world's first transistor radio.

Song Zhewu resisted the urge to question the transistor and turned his mind back to the tube.

In addition to radios, all electronic devices today are inseparable from tubes, and if you want to make money from household appliances, you need a large number of tubes, and it is not possible to buy them. Therefore, it is absolutely necessary to build an electron tube factory, but this matter needs to be postponed, and it is now imperative to build a radio factory first.

Song Zhewu nodded and said: "Lao Cui is right, if the tubes used in our radios are all bought, it is really not good, but now we can't make tubes, so we have to buy them first." However, we can find some ways to reduce costs in production, and try out the assembly line production method of Ford in the United States to assemble our radios and increase production. You can also work the appearance, the imported radio is a very simple square box, we can design a little more beautiful. Our factory is not too big for the time being, it is enough to sell in China, and now the main purpose is to train skilled technicians, and wait until a year later, we are in great development. At that time, we not only made our own tubes, but also bought our electrical products in the United States and Europe. ”

Song Zhewu picked up the drawings and said: "The current radios, including the one you made, are connected by wires, which is time-consuming and labor-intensive, and requires a high technical level of assembly workers, which is not conducive to large-scale production. I have a solution, which is to use a thin bakelite board to cover a thin copper plate, according to your drawings, use the corrosion method or simply use a knife to carve, in the copper-clad bakelite board to make the required circuit, when installing just weld the components to the corresponding position. In this way, workers can do their jobs with a little training, the production efficiency will be higher, and our production costs will be reduced accordingly. ”

Cui Hao and Li Minghua thought about it for a long time, and the first to react was Cui Hao. Cui Hao, who was in his early thirties, jumped up like a child, his face flushed with excitement, and said loudly: "This method is so good!" Commander, you're a genius. ”

Li Minghua stood up excitedly and said, "Okay! Commander, Lao Cui and I will start working today, and promise to come up with a radio with a high surname as soon as possible. ”

Song Zhewu looked at the excited Li Minghua and Cui Hao and said, "Don't worry, if you just let these two big talents develop a radio, it will be really overkill." ”

As soon as he heard this, Li Minghua anxiously asked Song Zhewu: "Commander, what other tasks do you have?" ”

Song Zhewu smiled and said, "In addition to the radio, you also have to try to make refrigerators and air conditioners. Refrigerators and air conditioners are now water-cooled in foreign countries, and we all know the shortcomings of water-cooling, that is, low efficiency and large volume. I know of a refrigerant with high refrigeration efficiency, and using it as a refrigerant can reduce the volume of refrigeration equipment. I will ask Director Wang of the Institute of Chemical Engineering to provide you with samples as soon as possible. I asked the people of Xinghua Company to contact you about the construction of the factory, and you only need to put forward specific requirements, and they will do the specific construction of the factory......"

(To be continued)