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Volume One: Angelica Meets Naturalization Chapter 307: Wireless Communication

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    After Mao Geng finished speaking, he opened the map and drew on Sakhalin Island, the Tartar Strait and the northeastern mainland of the Jin Kingdom.

    Peng Qinfang also knows that Mao Geng is under a lot of pressure. The golden imperialism in this time and space is equivalent to the existence of the American emperor in later generations. Since he is the world's largest hegemon, how can he allow others to snore next to him?  Sakhalin Island is so close to each other. It is said that it was originally the territory of the Jin Kingdom and was occupied by others for nothing. It would be strange for the hegemonic country of Jin Dynasty to sit back and ignore it!  So war is a matter of time.

    ¡°But even if Jin imperialism wants to go to war, it probably won¡¯t be that fast.  Peng Qinfang stared at the map, pointed at the Heilongjiang outlet, and said:

    "I heard that Han Huanzhang and Liu Wenbin sent a fleet to clean up Temple Street. There should be very few ships left by the Jin people. They should not pose a threat to Sakhalin in the short term. It is estimated that even if the Jin wants to attack Sakhalin,  Ye Dao, that will happen next year too.¡±

    Peng Qinfang believes that although the Jin people have a quick reaction force of cavalry and have the advantage of rapid mobilization of nomads, the attack on Sakhalin Island is not a pure land battle. If the Jin Kingdom wants to take action, even if there are enough ships, it will not matter if it does not take more than a year and a half.  I want to fight a large-scale attack on Sakhalin Island.

    Mao Geng couldn¡¯t help but smile when he heard this, nodded and said:

    "This is the truth. In fact, as long as the Jin people don't come to attack us, it's not impossible for us to give some benefits to the Jin people. I have already asked people to talk to Cao Zhaoyi. After arriving at Sakhalin Island, we will take the camera  Act, try to get the Jin Kingdom and the Song Dynasty to hold negotiations around Sakhalin Island, and let them talk about various plans such as the condominium special zone. The people of the Jin Kingdom want benefits, but they will pay the high price on the spot anyway.  It's not like the Song Dynasty has never talked about it before. Both countries are used to bickering, and it's best to bicker with each other for a year or two." However, then Mao Geng sighed and frowned: "However, we still have to  To be prepared for the Jin Kingdom to mobilize its troops, the necessary defenses must be in place! Within a year, there must be at least 5,000 troops and a powerful fleet, which requires a lot of manpower, material and financial resources. Alas! Raising troops is  It¡¯s a matter of burning money, but in the current situation, it¡¯s impossible not to burn it.¡±

    At the end, Mao Geng gave Lao Peng a meaningful look and said with a wry smile:

    "You are right, Lao Peng. Raising troops to fight is not fun. I get a headache when I think about it."

    "Hey, that's what I said, but there's nothing to worry about. Don't you worry about Ma Fen leading the army? It's just making more firearms. In addition, Han Huanzhang and Liu Wenbin have been very powerful at sea during this period, and the navy of the Jin people  They are not opponents at all. Their warships are likely to be robbed and burned. Of course, it costs money to raise troops to fight, but even if we spend three to four million dollars a year, we can still afford it, right?  I used to oppose spending money to raise troops, but for the sake of Sakhalin, I had to change my original intention."

    "Lao Peng, you don't know how expensive firewood, rice, oil and salt are. If the five thousand army is only equipped with rifles and shotguns, it is not expensive, and grenades are not expensive either. The problem is, we must also equip cannons, and mortars should be  The trial production will be successful soon. Mortars have a fast rate of fire, which is perfect for suppressing cavalry. The problem is that they consume a lot of artillery shells. Cannons, mortars, and artillery shells are all expensive. Besides, they need to be equipped with one.  Mules, reindeer, Ma Fen is also planning to build a thermal ball machine armored battalion. Preliminary calculations show that five thousand troops, that is two million guns. As for the fleet, it is even more expensive. Gunboats and lightning speedboats, their  The plan is to have eight ships, called the 88 Fleet, and at least two to three million guns will be required to smash them. You see, if you smash five million guns, you can only raise so few troops."

    Five million strings is not a big deal!  Peng Qinfang said to himself that we didn¡¯t come to the Song Dynasty to save money. If we make money, we can spend it. The money spent on national defense is well worth it.  As long as the mortar was successfully trial-produced, there would be no need to worry. Lao Peng felt relieved, patted Mao Geng on the shoulder and said:

    "Chief Mao, with mortars, what are we worried about about the Jin cavalry! If he dares to come, we can kill him as many as we have."

    "Mortars are a bit difficult to talk about. Back then, oh, no, it was later generations. Later generations, the Eighth Route Army trial-produced mortar shells and took a long detour. Haha, of course I also heard what Ma Fen said.  Ma Fen said that the quality of the iron produced by the Eighth Route Army's blast furnace was not very good. It could only cast white cast iron. The processing performance of white cast iron was very tragic. It broke as soon as it was put on the lathe. After a long time of groping, the solution was finally solved.  Problem. The cast iron in the Song Dynasty was not much better. Gray cast iron could be produced, but the material was still too poor, so the casting of mortar shells never passed the test. Later, the project was simply stopped.  Fortunately, after Lin Lishi came, he is a professional after all, and he has more methods than me. Now that gray cast iron has passed the test, it is estimated that our mortars will be able to test fire in a short time. You see, I originally thought that cast iron  The artillery shells were not difficult to produce, but the result was that the mortars were difficult to produce because of poor iron casting technology. Things in this world are easier said than done.It's difficult.  "

    In fact, gray cast iron is not high-tech. Lin Lishi started from two aspects: material and annealing, and it took more than half a year to basically solve it. However, the mortar also had the problem of welding the tail fin. Later, he also borrowed the original method of the Eighth Route Army.  The problem was solved by welding the tail fin using sintering and brazing in a furnace. It took more than a year to go back and forth.  However, Lin Lishi was not satisfied with the success of gray cast iron, and also claimed to create ductile iron. It would be great if ductile iron could be produced, but in the 12th century, ductile iron was considered a real high-tech.  Geng doesn¡¯t count on that for the time being.

    Lao Peng himself is engaged in technology. Hearing this, he sighed:

    "It is indeed not easy to climb the technology tree! I also understand this deeply. Take my time tinkering with radios as an example, it seems easy but difficult to do!"

    "Oh, has there been a breakthrough? I have long been thinking about when I can use radio." Peng Qinfang is a student majoring in electronics. In the time traveler's plan, the radio project was entrusted to him, but Lao Peng still  He was responsible for medical treatment, and he even stayed with the old emperor as a health doctor some time ago. Since there had been no good news about the radio project, Mao Geng almost gave up hope.

    "Isn't there a flying pigeon delivering a message?"

    "It's not safe to send letters by flying pigeons here on Sakhalin Island. Kites and eagles are the natural enemies of pigeons. There are a lot of kites and eagles in the large virgin forest on Sakhalin Island. It's okay to leave letters by flying pigeons in other places."  , it really doesn¡¯t work very well there. If wireless can pass the test and can communicate in real time, that is the most practical means of communication. Especially because our military strength is limited, if we don¡¯t use information advantages, we will be passive against Jin soldiers! Jin soldiers  We can mobilize tens of thousands or hundreds of thousands of troops at a moment's notice. If we have radio, we can be considered to have an information advantage. With the advantage of information warfare, we can fight flexibly and maneuver, and then we will have greater confidence in defending Sakhalin Island. Old  Peng, how about it, can the wireless be done?"

    "When I was in Lin'an, I had actually been tinkering with radios. Apart from medical matters, I also did manual experiments every day. Before I came here, I finally made a spark transmitter and an ore detector of some practical value, but this was still far away.  It¡¯s far from mature. When we get to Sakhalin Island, you send a few people to me, and maybe in three to five months, Sakhalin Island can use radio.¡±

    Lao Peng's radio research in Lin'an was like a thief, because he was worried about being falsely accused of witchcraft. Secondly, Lao Peng was a person who didn't like to show off. Well, it should be said that he was very responsible and low-key, so he always kept a low profile.  He worked hard on the ground, even hiding it from Wen Yuan.  The progress of radio was also full of twists and turns. He Chi'an only knew that Lao Peng was tinkering with it, but there was no big progress, and later he simply didn't care.

    But hard work pays off. After Lao Peng¡¯s unremitting efforts, radio finally achieved some success.

    When Mao Geng heard this, he was really overjoyed. He immediately stepped forward and gave Lao Peng a bear hug, and then pulled Lao Peng away without any explanation, saying at the same time:

    "Why didn't you tell me earlier! That's great! You should bring your test equipment, transmitter, etc. with you. Let's go! Go and have a look!"

    Peng Qinfang said to himself that he originally wanted to talk about radio in Sakhalin Island. The transmitting and receiving device he made was a bit crude. It would be better to improve it again in Sakhalin Island so that he could demonstrate it. But now Mao Geng is eager to see it.  , then let¡¯s see.

    Peng Qinfang dug out a box from under the bed, opened the copper lock, and took out two smaller boxes. The boxes were about the same size as those containing Yili milk. Mao Geng thought to himself, Lao Peng did a good job miniaturizing the box!

    Lao Peng held the two boxes like treasures and said:

    "Of these two boxes, one is a spark transmitter and the other is a detector. Let's go to your place and take a look. You have a table over there, which seems more convenient."

    When Lao Peng put his treasure on the table, Mao Geng finally saw the true face of the radio device made by Lao Peng.

    ¡°This thing is not complicated, and it¡¯s not big either.¡±

    "I didn't say this thing is complicated! The spark transmitter is inherently simple. You see, here is the boost circuit, and here are the two poles that trigger the spark. In fact, it is similar to the principle of a car spark plug. Here is an inductor-capacitor oscillation circuit.  , this is of course the button to send the report.¡±

    When Lao Peng said this, Mao Geng kept nodding.

    Then Lao Peng pointed to the device next to him and introduced:

    "This ore detector is simpler. The key material is the soybean-sized ore inside. This ore is galena, which is lead sulfide. The lead sulfide contacts a copper spring pin, and its function is almost equivalent to a diode.  Of course, the performance cannot be compared with that of diodes, but it can only meet the requirements for receiving telegrams. This thing is an ore detector.As for the telegraph recording wheel next to it, its function is to automatically record the radio waves detected by the ore detector on the recording paper. After arriving at Sakhalin Island, install an escapement with a clockwork, and it can automatically record  .  "

    "Is it that simple? You don't even need a vacuum tube!"

    "No need, no need at all! Lead sulfide and copper pins are equivalent to diodes. Haha, it's that simple!"

    "Lao Peng, you are so awesome!"

    "What a bull! I have to thank my university teacher for this, thanks to a story he told during his lecture. My teacher was a radio enthusiast when he was in elementary school. He was very proud to tell the story of his homemade mineral radio.  It was also discussed in great detail, including the formation of lead sulfide by heating lead and sulfur. In the early 1960s, radios were a luxury product. Having a homemade ore radio was a great household appliance. Haha! As for this  Everyone who studies radio knows about the spark transmitter. Of course, knowing it is one thing, but making it is another thing. For example, making a homemade capacitor is not that simple."
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