Chapter Seventy-Eight: Circuit Course The Kiln Gang Fights Back

After Liu Chenghuang led the troops to gather several other detachments to carry out the mission, according to the advice of the command center, they came directly to Niutou Mountain, because since they were exposed, and there were hundreds of thousands of Dashun troops around, it was inconvenient to hide, so it was safer to go to Niutou Mountain. Yan Xing also got a telegram notification from Yaogang and knew that Liu Chenghuang would bring people to them, so Yan Xing also sent people down the mountain to meet Liu Chenghuang and them. Liu Chenghuang and the others came to the mountain and naturally received a meal of wine and meat. Yan Xing, Li Kui, and the three masters, they were very happy to see Liu Chenghuang, they really wanted to get more news from Liu Chenghuang from Yaogang, but Liu Chenghuang said: "I'm like you, I've been cats in the mountains, and I don't know what other people's battles are like." ”

Li Kui said: "Come on, didn't you have a fight last night, we were in a hurry, and the command center just didn't allow us to move." Alas! Rush to death. ”

Yan Xing said: "The command center gave us instructions that after Li Zicheng withdrew his troops, we would immediately take over these county towns occupied by Li Zicheng, especially Daizhou. ”

Liu Chenghuang said: "It seems that our Mr. Zhang has assigned all the places south of Daizhou to Yaogang. Therefore, the importance of Niutou Mountain is more prominent, and with Niutou Mountain as a support point, we can better manage the place south of this state. In fact, if someone has to take over these places, we can not fight them, we will have nothing to do and go out from Niutou Mountain to see them, anyway, this place is not far from anywhere, I will see if they can sleep well. ”

Yan Xing said: "Yes, it makes sense, with a solid stronghold like our Niutou Mountain, there is no need to put too much effort into defending other places." ”

Liu Chenghuang said: "If the estimate is good, after Mr. Zhang's play, Li Zicheng will probably withdraw his troops." Yan Xing is in charge, you have to send more scouts to investigate, you are familiar with the terrain here. When there is news, we act. ”

Yan Xing said: "Okay, today we will have fun, and tomorrow we will ban alcohol." ”

Li Kui was a little unhappy when he heard that alcohol was forbidden, he usually couldn't do without wine.

Zhang Zhimu was finally able to calm down and give a lecture to Yang Chang and them. Before the lecture, Zhang Zhimu made a phone call to Mr. Lu Bingyi and said, "Mr. Lu, I am going to give Yang Chang and them a lecture on electronics. Because the future electronic work is inseparable from mathematics, and there will be a lot of mathematical things that have never been exposed to before, I think Yang Chang is afraid that he will not be able to do it alone, this is really a big field. ”

Lu Bingyi said: "Okay! I'm going to send someone to listen to a lecture with you. ”

People are needed everywhere in Yaogang, but Lu Bingyi resolutely left half of his disciples to specialize in mathematics and physics research, and did not intervene in production, but when there was a need to give lectures, Lu Bingyi would send them out to give lectures. At other times, they are required to study behind closed doors. Zhang Zhimu agrees with this very much. He told Lu Bingyi: "Future development will not work without basic knowledge to guide the way." It's worth it no matter how much you spend on the foundation. ”

This time, Zhang Zhimu called Lu Bingyi in the hope that Lu Bingyi could send a person who was engaged in mathematics to participate in this study class.

Although Zhang Zhimu gave Yang Chang a circuit course, which was exactly what he learned in his major, he rarely used electron tubes in his previous life, because he was also an enthusiast in his previous life and was very interested in gall machines, so he was not too unfamiliar with electron tubes. But if he wanted to change all the semiconductor circuits he learned in his previous life into tube circuits, and then tell Yang Chang and them, Zhang Zhimu still spent a lot of time to prepare.

What Zhang Zhimu didn't expect was that there were nearly fifty people from Yang Chang and them who came to listen to the lecture this time. It seems that Yang Chang and they are now strong and strong. However, Zhang Zhimu still said at the beginning of the lecture: "Today, I saw that there are a lot more people who come to listen to the lecture than before, which is very good. But I still have to tell Yang Chang that your people are far from enough. Because after the success of the tube, we humans have entered a new era, and you people will soon be far from satisfying the needs. Therefore, Yang Chang, you still need to cultivate more talents, and you must cultivate talents as soon as possible. It is said that the book will know less when it is used, and the person will know less when it is used. ”

Before this lecture, Zhang Zhimu told Yang Yulin that he was not allowed to disturb his lecture if there was no major matter. The course took two and a half days, Zhang Zhimu started with diode rectifier circuits, and then talked about voltage amplification circuits. When it comes to voltage amplification circuits, based on experience, Zhang Zhimu knows that this is the key point, and they must be allowed to digest better. Here, Zhang Zhimu introduced the basic principle of the amplifier, and then introduced the diagram analysis method of the amplification circuit and the analysis method of the equivalent circuit in detail. Then, the resistor-capacitance coupling and inductive coupling amplification circuits, the input-output main reactance matching of the amplifier, and the interference and noise of the amplifier are explained.

Hearing this, Yang Chang and the others found that the electron tube could be used in this way. Looking at everyone's happy expressions, Zhang Zhimu said: "What I told you above is the voltage amplification circuit of the transistor, that is, the signal amplification circuit, and we use more power amplification circuits. In other words, it is necessary to amplify not only the signal voltage, but also the current. ”

Then, Zhang Zhimu told them what a power amplifier is, unilateral power amplifier, parallel use of electron tubes, push-pull power amplifiers, Class A and Class B Class A and B amplifiers.

Finally, the negative feedback in the amplifier and the oscillation circuit of the electron tube are discussed. In particular, he talked about RC oscillators, because Zhang Zhimu gave Yang Chang the assignment that they assigned was to use an RC oscillator composed of two electron tubes to build an audio oscillator. ZHANG ZHIMU TOLD THEM THAT THE FREQUENCY RANGE OF SOUND THAT HUMAN EARS CAN HEAR IS 16HZ TO 16KHZ, AND THE FREQUENCY RANGE OF HUMAN VOICES IS 300 TO 3400HZ. Now you need to use an RC oscillator to build a suitable audio oscillator, and the requirements are that the sound heard by the ear is a little better. Because in the future, this audio oscillator will be used to replace the sound of striking the electric bell when the telegram is received, and the length of the telegraph on and off in the future will be expressed by the length of the audio ring.

Zhang Zhimu just wanted Yang Chang and them to realize the Didi sound when receiving telegrams in their previous lives.

Zhang Zhimu also knew that these were the courses of one academic year in the university in his previous life, and it was impossible for Yang Chang and them to digest them all at once. But Zhang Zhimu didn't have time to accompany them, so he could only show them the way and let them digest it slowly. Fortunately, when Yang Chang and his people produced electron tubes, their understanding of electron tubes was also very clear.

After Zhang Zhimu introduced to them how to make circuit boards from thin wooden boards, he spent half a day introducing them to the principle of making loudspeakers.

Zhang Zhimu can only introduce them to the working principle of the dynamic horn now.

Zhang Zhimu said: "I'll introduce you to something that can amplify sound." We've all used telephones, and we have headphones in them, but the sound on them is too quiet. If we want to make a louder sound, we need a megaphone. The horn I'm going to introduce you to is part of the megaphone. The principle of the amplifier is to use the amplifier we have learned to amplify the electrical signal in our microphone, and then turn the amplified electrical signal into sound. So this thing that turns electrical signals into sound is the horn we are talking about. ”

Zhang Zhimu used to be a sound enthusiast and dismantled the speaker himself, but he didn't expect to make the speaker now. In fact, the dynamic horn is very simple, it consists of three parts:

The first is the vibration system, including conical paper cone, voice coil and centering piece, etc.;

the second is the magnetic circuit system, including permanent magnets, magnetic plates and field columns;

The third is the auxiliary system, including basin frame, wiring board, edge pressing and dust cover, etc.

Zhang Zhimu used the diagram on the blackboard to introduce the structure of the horn to everyone, and said: "This is the component of the horn, in fact, their principle is also very simple. When an audio current passes through the voice coil in this magnetic field, a magnetic field that changes with the audio current is generated, and this magnetic field interacts with the magnetic field of the permanent magnet to cause the voice coil to vibrate along the axis, so that the sound is emitted. Generally, the most basic parameters we want to give a speaker are the power and input impedance of the speaker, and we generally use more than eight ohms. In fact, there are many types of horns, and I will introduce to you a large horn that is often used outdoors, called horn horns. ”

Zhang Zhimu drew a schematic diagram of the horn horn on the blackboard.

"It consists of two parts: the vibrating system (tweeter) and the horn. The vibration system is similar to that of a paper cone speaker, except that its diaphragm is not a paper cone, but a spherical dome-shaped diaphragm. The vibrations of the diaphragm radiate sound waves into the air through the horn (after two reflections). It has a high frequency and high volume, and is often used for outdoor and square sound reinforcement. In addition, because horn horns are generally used outdoors, and the lead wires are generally relatively long, they often need to be driven by constant pressure. On the horn side, a transformer is also used to match the drive signal to the resistor. ”

Zhang Zhimu spent two and a half days talking about the basic circuit of the tube, and half a day talking about the structure and working principle of the horn.

However, the impact of these three days on history is very huge. After the bridge was rebuilt on the Xiaoling River, the Dashun army began to retreat. They first withdrew from the state of Dai. After Yan Xing's horse detective found out, he immediately sent a message to the mountain, and Yan Xing, Li Kui and Liu Chenghuang led the team directly into Daizhou. Fortunately, Li Zicheng did not slaughter the city after entering Daizhou, but Daizhou also suffered serious losses after the destruction of artillery fire. Especially when the Dashun army retreated, they took all the grain with them. The situation in Daishu is very dire. After the command center learned of this situation, it ordered Yan Xing to immediately transfer grain from the cattle head to support Daizhou, and absolutely not let the people of Daizhou starve to death.

Yan Xing and the others knew that they were now representing Yaogang, and after their people entered the city, Qiu did not commit any crimes, and after taking over the city defense, they immediately appeased the people, organized the cleaning of the roads in the city, and treated the injured. After the food arrived, relief food was distributed, so that the people in the city were grateful. The people also took the initiative to help the Yaogang people take over the city, and the army and civilians began to heal the wounds of the war. Soon order was restored to Daizhou. There are Yaogang people to take over here, and the people are willing, they have long known about the affairs of the Yaogang people, at least there is food.

Zhang Zhimu returned to the command center three days later, and Chen Yufeng said: "Zhimu, you are really good!" At this time, you can still have the heart to give lectures. Do you know how much has happened these days? ”

Zhang Zhimu said: "Cough! If you and Mr. Ouyang are involved in the war, I won't care. Didn't you say that I had to get out of the wireless telegraph matter even if I didn't care about anything else? The content of my lectures these days is wireless telegraphy. ”

Ouyang He said: "I looked for you several times, but Yang Yulin blocked the car, and said, you are not allowed to look for you if you are not in a hurry." Hehe! ”

Zhang Zhimu said: "I want to concentrate on finishing some of the lectures and then let them digest them by themselves. How about it, Li Zicheng has hundreds of thousands of troops, and he didn't withdraw so quickly, right? ”

Ouyang He introduced the whole situation.

Zhang Zhimu said: "It seems that it will take a few days for Li Zicheng to completely withdraw completely. I don't think we can wait until they're all out and they're stable. We're going to catch them off guard. ”

Chen Yufeng said: "When you come over, I just want to discuss with you, and we have formulated a plan for a surprise attack." You see, no comments will be available tomorrow night. ”

Ouyang He introduced the plan to attack the smelting field and Lingshui Wharf according to the map, and Zhang Zhimu listened to it and said, "Great. Just do what you planned. Anyway, Li Zicheng has done all the work that should have done for us, and it is time for us to take action. But after these two fights, we adhere to one principle, and absolutely do not fight to the death with Li Zicheng. If you can let them go, let them go. We are not in a hurry to fight slowly, we will fight when we have the opportunity, and we are not in a hurry if we don't have the opportunity. The Fen River has been civilized. After we finish this battle at Lingshui Wharf, we can blockade the Fen River and the Yellow River. Li Zicheng wants to go back to Shaanxi, but do we want him to go back? ”

Chen Yufeng said: "After the smelting field and Lingshui Wharf are settled, we will clear the Dashun army north of Yaogang. In this way, we are all connected from the north of the kiln. ”

Zhang Zhimu said: "In addition, I think Liu Chenghuang and they left five hundred cavalry in Daizhou, and the rest of the men and horses can participate in the battle at Lingshui Wharf." After the Dashun army in the north of Yaogang has been resolved, we will send people to Daizhou, Yuanping, Wutai, Fanzhi and other county towns in the north to maintain social order, appease people's hearts, and carry out effective management. In our name, we have set up self-government committees everywhere. Exercising the power to govern. ”

Ouyang He said: "Don't worry, I have already arranged the people." Mr. Yan and their people are also in place. He is an old man who is more serious, and I haven't seen him recently, and I heard that he is also very busy, and he often scolds. That is, Yang Jing can coax him. ”

Chen Yufeng said: "This old thing, looking confused, actually knows a lot in my heart. He knew that this little thing about him was not an easy errand. ”

The kiln people really started to shoot at night. Tonight, solve the two places of the smelting field and the Lingshui wharf at the same time.

Liu Yun led the team to attack the smelter.

Two thousand cavalry were mobilized in this direction, and the first division of Zhao Jinli's Yaogang People's Army.

In the direction of Lingshui Wharf, due to the farther distance, 5,000 cavalry and 1,500 cavalry of Liu Chenghuang were dispatched.

They carried a lot of mortars drawn by horse-drawn wagons on both roads, and they each carried five heavy machine guns. This made Li Yunhe feel very distressed. The machine gun shooter, that is, after several days of shooting training, had no choice but to rush into battle.

After dark, the soldiers and horses of the kiln gang were ready to go after dinner. Li Jing's special forces were divided into two roads, one east and one west, to open up a road for the two roads. To the east is the direction of the Benye field, and to the west is the direction of the Lingshui Wharf.

All the way to the east, led by Li Jing personally, they carried a lot of **, far away from the blockade line of the Dashun army, they dismounted, with ** on foot, when they were closer to the blockade line, they put on a camouflage net and crawled forward, and finally a few people sent ** under the fence and pulled back the ignition wire. When it was almost time, the people behind informed Li Jing that the cavalry was in place. It turned out that the cavalry behind was wearing chews, and those who quietly led them over were ambushed behind. When the time came, Li Jing ordered the detonator to detonate, and after the detonator pressed the detonation button, a row of "boom boom" sounded, and the entire fence several zhang wide was blown up into the sky, and the kiln soldiers behind immediately rushed up with the bridge plate and erected a bridge deck several zhang wide on the trench. The cavalry in the rear rushed over with a bang and split into two sides to provide cover for the infantry. The infantry of the brigade quickly ran forward and quickly passed through the gap.

The same approach was done in the west, and it was also a breakthrough in the sub-time. There was almost no blockade when the blockade was broken in both directions. The soldiers of the Dashun Army on the blockade line didn't expect that there would be people rushing out on a large scale, not to mention that they were shocked by the violent explosion at the beginning, and then the cavalry with a torch rushed over, and the number of them in each place was not much, where did they dare to approach. Only when everyone had run away did they dare to come over slowly. However, they found that there must have been a lot of people rushing out this time.

Because the fence blown up by the kiln gang people is several zhang wide, and the bridge plate paved in the trench is also a few zhang wide, so although the time to rush out is very short, the number of people is definitely indispensable. But when they reported the situation, they couldn't tell how many people had rushed out.

When these conditions were reported to Li Zicheng's camp in the morning, the military advisor Song Xiance knew that the situation was not good, because the two directions that the Yaogang people rushed out in were one in the direction of the smelting field and the other in the direction of Lingshui Wharf. It is impossible for them to rush out a little people to reinforce these two places, what they are afraid of is that the Yaogang people really make a move this time, and the two teams besieging others will be made dumplings if they don't do it well.

Song Xiance called Li Zicheng and Niu Jinxing, and when he told them about the situation, the two of them were also taken aback. But Niu Jinxing said: "We have more than 50,000 horses in these two places? The team of the kiln gang people is tens of thousands of people in total, and it is impossible for them to ignore the kiln gang and dispatch all of them. So these two places are under siege, and there will be nothing wrong with them for a short time. We immediately sent out cavalry to support. ”

Li Zicheng said: "Don't be careless, they know that we have just withdrawn, and it is still very chaotic, so they took the opportunity to start." We sent 20,000 cavalry and 20,000 infantry to reinforce each of the two places, and we moved immediately, and we couldn't delay. ”

Besides, Liu Yun's way, after the cavalry covered the infantry to rush out of the blockade line, the cavalry continued to lead the way and went straight to the smelting field. Thirty miles away.

The land passage in and out of the smelter was a long valley, and the smelting plant could easily build a wall to guard the gate of the smelter, and the camp of the Dashun army could easily block this passage. However, the soldiers of the Dashun Army did not expect that there would be someone outside them and block them here.

Liu Yunke is very aware of this situation.

When Liu Yun and his team arrived, they immediately ordered mortars to be set up and heavy machine guns to be mounted. At the same time, in order to guard against Li Zicheng's reinforcements, he ordered a regiment of infantry to set up a position to block the reinforcements of the Dashun army. Ask them to focus on the arrangement of obstacles such as horse rejection.

This regiment commander is also a veteran of Yaogang, he said: "Don't worry, let the horses fight the cavalry, we used it when we went south and north." This is the ability of our kiln people to look after the house. ”

After listening to the words of the head of the regiment, Liu Yun's heart was very warm, and with them guarding here, Liu Yun was very relieved and said, "Okay, I won't bother to talk." Be careful. ”

At this time, Zhao Jinli, the commander of the first division, said to Liu Yun: "Head, those cavalry are all treasures. I think it's okay to deal with the Dashun army here with our infantry. In a moment the artillery blasted their camp open, and our infantry went in. The heavy machine gun was mounted on the car, and it was pushed forward by people, and it was not possible to use a horse, because I was afraid that it would be difficult for the horse to start. ”

Liu Yun said: "When the day dawns, we will fight with the smelting field, and these tens of thousands of people will not run away." Fighting at dawn is beneficial to us, and we can better play the advantage of firepower. ”

Zhao Jinli said: "I'll just look at it, you can squint for a while." I can't sleep when I see it, and after the fight here, the reinforcements of the Dashun army should also arrive. You have to keep fighting. ”

The inside of the smelting field has also been notified a long time ago, "I will immediately cooperate with the troops outside to take the initiative to attack the Dashun army besieging the smelting field." ”

The defenders of the smelter were very happy, for they were suffocated here.

As soon as it got dark, they all began to prepare. There are more than 3,000 soldiers in the kiln here, and more than 1,000 of them used to perform security work here. There were also 2,000 people from the smelter. Here are also two heavy machine guns and heavy mortars that were not used. The captain of the guard knew that he should use this thing, otherwise he would not have a chance.

The regimental commander who guarded the city left 1,000 infantry and 10,000 reservists to continue to defend the city. He was to bring 2,000 infantry and 20,000 reservists to attack with the soldiers from Yaogang. Before they set off, they prepared a large number of ladders and door panels and other things, which were used when preparing to break through the Dashun military camp.

When it was just beginning to dawn, they quietly opened the city gates, came to the attacking position, and laid up artillery and heavy machine-gun positions.

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Paragliding, rubber model airplanes, piano making, and building an air force. --Progress of "Memories of the Southern Song Dynasty".