Go back to the past and be a schoolboy

Chapter 278 Outdated Greetings

"Here, Zhiyuan, before finishing the work on the cotton and iron cooperation, he assigned me another job. It's because I'm afraid I won't be free."

In the Zhang family's house, upon hearing the news from the telegram that Cheng Nuo had asked him to help, Zhang Jian couldn't help but stroked his beard. Although he was complaining, the smile on his face had already betrayed his true thoughts.

Huang Yanpei, who was seated with him, saw it through and deliberately joked: "Well, it seems that you are really busy, brother Zhang, why don't I talk to that surnamed Lu, maybe I can sell me three points of thin noodles, just right after the incident Go to Beijing and find Zhiyuan for a drink or two."

Zhang Jian leaned over and asked curiously, "Why, what are you going to do in Beijing? You might also be interested in business."

Huang Yanpei smiled and shook his head: "Industry? Of course it's impossible. My ideal is in the education industry. I can't spare my energy to do other things for the time being. Going to Beijing is also a representative of the Jiangsu Education Association, with Peking University and Nanjing Normal University. Jinan School organizes the China New Education Co-Progression Society, which is busy with vocational education."

Zhang Jian suddenly realized: "No wonder, no wonder, a while ago you asked about the Work-Frugal Institute in France, it must have something to do with it?"

Huang Yanpei paused for a moment, and said with emotion: "Thinking carefully about the past two years, what Zhiyuan and the others have done is something that we, the older generation, have spent decades of effort, and may not be able to do it. Really. Heroes make times."

Zhang Jian deeply agreed: "Indeed, think about that Krupp steel, and look at this chemical product, especially this radio broadcast. We actually took out something that foreigners can't make, and we put it before. The unimaginable, that is, Zhiyuan."

Speaking of this, Huang Yanpei suddenly put away his smile: "Speaking of which, Lu Yongxiang belongs to Duan Qirui after all, we still have to treat it with caution and try to avoid confrontation with him. If it is really inconvenient for you, I can do it for you. I am still more interested in the three little guys."

Zhang Jian sighed, and said: "If the radio is left alone, in time, the domestic market will definitely be occupied by foreign capital, and in the long run, hundreds of millions of money will be lost. In terms of international propaganda, it will often be framed, which will greatly affect our country's diplomacy. The impact behind it is far from A few dolls are as simple as that."

"The international radio industry is booming, and neighboring Japan has also launched international radio communication services. In view of this, in order to prevent foreign aggression, restore sovereignty and promote national news, we were at a loss for what to do in the beginning, but now Zhiyuan has taken the lead One step, we must support behind." Huang Yanpei stood up and said seriously.

The two looked at each other, and both reached an agreement on this.

Originally, Zhang Jian was an important member of the Beiyang government. He was Zhang Guogan's predecessor and served as the head of the Ministry of Agriculture and Commerce. He had a certain prestige within the government.

As for Huang Yanpei, because he has been busy with vocational education in the education field, he also has a high reputation in the society. It is precisely because of this that he was also hired as the chief education officer a few years later.

These two people came forward, and Lu Yongxiang, the envoy of the Songhu Guards, could not find anything in these ore radios and radios, and under the pressure of public opinion, he hurriedly took advantage of the slope to get off the donkey without saying a few polite words. , directly released the person.

"Wh... what, is this Professor Cheng asking the two gentlemen to rescue us? Is... really Professor Cheng?" Just after coming out of the guard room, Zhang Yulin excitedly took Zhang Jian's hand, and the huge Surprised, he seemed a little incoherent: "Cheng...Professor Cheng is such a big man, he still cares about us."

Zhang Jian patted the soil on the young man's shoulder, pretending to be angry and said: "With such a reputation, besides Professor Cheng named Cheng Nuo, is there another Professor Cheng? But then again, although Zhiyuan wants to The ones who rescued you, but Mr. Huang and I were the ones who really took action, shouldn’t we be thanked!”

Zhang Yulin suddenly felt a little embarrassed, and stammered: "No...that's not what I meant, but I just thought it was Professor Cheng, so... I don't know what to say. I and the other two partners are also very grateful to the two of you. gentlemen……"

Huang Yanpei couldn't stand it any longer, and while checking the conditions of the other two young people, he comforted him: "It's alright, alright, the kids have suffered a lot, so let's go out quickly, the room is so damp that it can drip. You have to wash it well when you go back, as for Zhiyuan... you will have a chance to see it later."

Zhang Yulin originally wanted to say something, but he happened to come to the door, looking up against the huge sun, under the strong light, a huge sense of discomfort shrouded his heart.

"Hey, this little guy just came out of the dark place and suddenly walked into the bright place. He almost forgot about it. Let Zhi (Huang Yanpei) help him quickly." Seeing that the situation was not good, Zhang Jian hurriedly Supporting.

"Hey, this is the way of the world." Huang Yanpei sighed, and hurried forward to support her.

Fortunately, it was just some discomfort. After a short rest, Zhang Yulin recovered. After a few words of thanks again, he finally set foot on the way home.

The news of the students' release quickly spread, and most people who cared about the incident breathed a sigh of relief, happy for this hard-won victory, and expressed their congratulations in various media.

Especially in Central Park, where the "National" broadcast radio was set up, it was crowded with crowds who came to celebrate, and queues began before dawn, and scalpers were attracted to join in the middle, earning money by helping people occupy seats.

Even so, there is not even a place to step down within a hundred meters. Even if the sky is cloudy and it is going to rain, some people in the area insist on listening to the radio.

When the weather is fine and the signal is good, the content of the broadcast is clear and loud, and the audience who arrives are very excited, and they hear all kinds of long live voices coming one after another when they hear the excitement.

From "Long Live the Nation" to "Long Live Broadcasting" and finally into "Long Live China", there was even a part of "Long Live Professor Cheng" in the middle. The scene was extremely hot.

In order to increase sales, the middle paper media even set up a special column called "National Broadcasting Program Preview", which is specially used to inform the next day's "National Broadcasting" program. Sure enough, the sales volume jumped two grades in the east wind .

In the Academy of Sciences, Cheng Nuo was listening to his subordinates report on the radio.

"Currently, our radios have already occupied every crowded place in Forty-Nine City. Even though a few locations are remote, because of our unique radio, the traffic in these areas has increased greatly, and the transmission effect is extraordinary." Jiang Jiangzuo opened the report in his hand and read.

"Very good, but our ore radio is too simple after all. If we want to improve our communication effect, we still need a special radio. It may have to work hard for Mr. Tesla and our comrades from the Applied Engineering Institute." Cheng Nuo nodded , looked at Tesla.

In order to improve the quality of listening, the radios used now have an amplifier circuit at the front end, which amplifies the signal received by the antenna before performing frequency selection and filtering, and the amplifier circuit depends on the power supply to work.

There is no amplification circuit in the ore radio, relying on the antenna to convert electromagnetic waves into current can completely guarantee the operation of the equipment.

Just like taking water from a river, you can use a water pump, which pumps out fast and fierce water, or you can use a water truck. Although the efficiency is a little lower, it can still achieve the effect of water fetching, and does not require external energy.

Despite all the advantages of the ore radio, it is this simplicity that determines its upper limit is not very high.

After all, the energy of radio waves cruising in the air is limited, and the current and voltage in the detection circuit can be described as weak, so the volume of the ore radio cannot be very loud.

To put it bluntly, the ore radio that Cheng Nuo built in a crowded place meant that the people around him could hear it clearly, while those outside were either joining in the fun or relying on word of mouth, so the effect was very limited.

That is to say, Cheng Nuo temporarily recruited a group of people to develop a speaker with a higher impedance. Even so, he couldn't leave the antenna, otherwise the oncoming noise would be full of noise.

"Although I don't know much about radio, I still have a general understanding of the principles of spark transmitters and ore radios, especially spark transmitters, which are inherently incapable of concentrating power on one frequency.

The generation of each spark will radiate energy in a very wide frequency band, which is a serious waste of frequency bands. If we want to continue research in radio, the problem of its carrier wave cannot be adjusted also needs to be solved. Cheng Nuo said after learning about the situation from his subordinates.

Jiang Jiangzuo hesitated for a moment, and asked tentatively: "That is to say, should we completely abandon the research on spark transmitters for the technology behind us?"

"No, the spark transmitter still needs to be studied, but both parties need to adjust the orbit." Cheng Nuo shook his head, got up from his chair, went to the blackboard behind, and drew on it:
"The spark transmitter contains a high-voltage power supply, which continuously charges a capacitor. The voltage across the capacitor will rise rapidly until it reaches the breakdown voltage of the spark gap. The tens of thousands of volts of high voltage will turn into a current pulse and reach another section of the circuit... …

The high power and ultra-wide frequency band brought by it are not all shortcomings. If you think about the problem from another angle, adjusting the track is its biggest highlight. "

After all, Cheng Nuo put his expectant gaze down below, hoping that everyone below would give him a satisfactory answer.

It's a pity that this overly detached thinking made it difficult for everyone to follow. When Cheng Nuo looked at them, he either lowered his head and didn't dare to look at them, or shook his head to show that he was still thinking. Even Tesla, the leader, frowned. Lock.

Sighing secretly, Cheng Nuo decided to solve the puzzle by himself: "If this machine is used in electronic countermeasures, it will become a significant advantage. Under multi-band interference, what news can the enemy receive?"

Thinking of the spark transmitter and ore radio at hand, Cheng Nuo suddenly felt like laughing again. One was launched with the momentum of "sweeping thousands of troops", and the other was received with the heart of "inclusiveness".

However, because of this, the combination of the two was able to achieve remarkable achievements on the battlefield of the First World War. Later, the relationship between the two parties can be continued to be closer, and it is not impossible to manufacture remote control toys along the way. Of course it's another story.

"This idea is good!" Jiang Jiangzuo quickly cleared his mind and said excitedly: "In this way, when we pull out this kind of radio jammer on the battlefield and make the enemy deaf and blind, we will definitely catch them by surprise. Attack them unprepared!"

Cheng Nuo breathed a sigh of relief, holding hot tea and said, "That's the way of thinking. Even if we don't do it now, we still have to pay attention to it. We can do as much as we can, but you have to pay attention to one thing. "

Jiang Jiangzuo asked, "What?"

Cheng Nuo instructed: "That's secrecy. To put it bluntly, this thing is information warfare. If the enemy has prepared in advance, then the outcome of the battle will be hard to say."

Tesla next to him listened, nodded seriously, and asked, "Then what should we do next?"

Cheng Nuo thought about it, and said seriously: "First, take out the triode technology we studied before and put it into use. The future radio technology is in this aspect. Based on this, we will develop a radio with a more accurate frequency and a more compact size. Transmitter, once successful, immediately apply for a patent;
Second, the research, production, and assembly of the equipment must be completed in the concession, and at the same time, the leather bag companies we set up in foreign countries will be brought in to join in, lest some idiots from the government will hit our heads. Last time it was a student, next time But it's hard to say who it is.

Third, set up the broadcasting equipment as soon as possible, establish our broadcasting station, and adjust the original one-hour trial broadcast time to two hours to enrich our broadcasting content. In this regard, please invite Mr. Tao Xingzhi to come and have a look Does he have guidance on literacy work..."

In the era of warlords, many of the jobs Cheng Nuo wanted to do were constrained, especially in the field of radio. All supplies related to radio were limited to military use, and all countries regarded the materials and parts used as prohibited items. In desperation, most people As a last resort, he took risks and engaged in various smuggling.

Nowadays, the development gap between the big guys is not too big. In addition, foreign countries do not have a deep understanding of this, and this is even more so in China. There is still some room for maneuvering, so this is also the reason why Cheng Nuo chose to enter the radio at this time.

If you miss this village, you really don’t have this store.

Sure enough, the efforts really paid off.

After Zai Tao and his party arrived in Europe with a kilowatt transmitter, they transmitted the local news and the situation of the students by radio in time. They were transmitted from Paris to Shanghai every day. At [-] o'clock in the morning, the people of the two places received the message almost simultaneously.

After the First World War, I was more concerned about the content of the negotiations. This time, with the radio, I quickly learned the local news. In an instant, the people's attention to the radio went up to a higher level, and the form of greetings quietly changed.

It turned out to be: "Have you eaten?"

Now it's: "Have you listened to the radio?"

(End of this chapter)