Yang Gan looked at the wooden box covered with black cloth, smashed his mouth, and asked curiously, "What is this?"
Everyone also showed curious expressions. After all, Zhang Yumeng invented many useful things, and even many things were silently affecting the pattern of the times.
For example, allicin, this thing is so terrifying on the battlefield, it is no less than an elixir that can kill the flesh and bones of living people.
"Hehehehe~~~!"
The candlelight reflected Zhang Yumeng's expression in a very sinister way, and combined with her arrogant laughter, she looked like a big villain.
"Ahem, cough, cough."
She cleared her throat, grabbed the black cloth, and said loudly, "Since you asked sincerely, I will tell you with great mercy. In order to prevent the world from being destroyed and to maintain world peace..."
Suddenly, Yang Gan interrupted, "Hey, that's it, you're showing your age."
This sentence almost choked Zhang Yumeng to death, and she glared at Yang Qian bitterly.
A "swish" sound.
He threw away the black cloth, pointed his hands at the big box in front of him, and said, "Thump, thump, thump, thump, thump, thump!"
"This is what I made - a cordless phone!!!"
"bass!!!"
Yang Gan stood up suddenly, staring at the plain-looking box in front of him, and his breathing gradually became rapid.
Cao Wushuang and Krisna had no idea what was going on, but judging from Yang Gan's expression, this must be a rare treasure.
Yang Qian hurriedly took a few steps forward and rubbed the surface of the box with very gentle hands. Yes, it was actually a plastic shell.
For a long time, Yang Qian always thought that he would be happy as long as he could make a phone. However, there was a troublesome thing about the phone, which was the wiring.
Although the telephone wire is very thin, it is also made of copper and needs to be buried underground. When the distance is long, it is a huge project in terms of materials and manpower.
But he didn't expect Zhang Yumeng to give him a huge surprise. In this way, he directly saved countless time, countless materials, and countless manpower.
Seeing Yang Qian being so rude, Zhang Yumeng shrugged and said amusedly, "You're exaggerating. It's just a radio. If you didn't have to make the materials yourself, I would have made it for you in minutes in my previous life."
Everyone knows that the conversation between the two people is always incomprehensible to everyone.
Yang Qian lowered his head and kept shaking his head. Suddenly he turned back suddenly, his face flushed with excitement.
"What do you know?"
Yang Qian raised his hands in claws to his chest, and blurry light burst out in front of his eyes.
"This is the real artifact. In modern warfare, whoever gets it can win. It is the most powerful weapon in the 2 million years of human evolution."
Seeing Yang Qian's exaggerated expression, Zhang Yumeng's mouth twitched hard, leaving a drop of cold sweat.
"Brother, this is too exaggerated. I just made a wireless phone, not a nuclear bomb."
Yang Gan said disdainfully, "Do you think nuclear weapons are the strongest weapons of mankind? Wrong, you are absolutely wrong. Nuclear weapons are powerful, but who would use them in conventional warfare? At most, they are used as a means of deterrence."
"The most powerful weapon that mankind has had for 2 million years is communication technology."
"Think about it for yourself, I can be the first to get the latest information, and no one will be able to find it out of my palm."
"If there is a rebellion in a place, he has to prepare food and grass and prepare to gather people. Maybe before the departure, he can make a phone call and give a few orders. Before the rebels are ready, hundreds of thousands of troops have already arrived. He's surrounded."
"You can also imagine that the army is fighting in a place thousands of miles away. If there is no other way, you can directly ask me for instructions. Countless think tanks can help with ideas. With this thing, there will be no difference in the military orders of generals abroad. Accept it."
"What is this? This is the sacred weapon of the country - a mobile phone!!!"
Compared to Yang Qian's enthusiasm, everyone narrowed their eyes and looked confused on their faces.
"Mobile phone? What is that? A machine that can be used for farming?" Ran Jing looked curious. After all, your favorite thing is a machine that is helpful for farming.
Yang Gan laughed and said, "Mobile phone, in words you can understand, I can use this box in Yuntong to talk to people as far away as Wanghai County, and people in Wanghai County can also talk to me through this box."
........
Everyone took a breath and widened their eyes. Everyone present was not stupid, and they all knew more or less about war.
Cao Wushuang was a skilled archer and horseman. Although he had never been on the battlefield, he was well versed in this art.
Needless to say, Ran Jing was a killer on the battlefield.
Krisna and Belika both came from fighting countries, how could they not know the value of this thing.
Cao Wushuang was dumbfounded and murmured, "Can we talk at a long distance? Is this magic?"
"It feels like witchcraft to me."
"Is it really possible to make something like this?"
"I really want to try it, I'm really looking forward to it."
"Oh ho~~~!"
Yang Qian immediately asked, "Is there this in Zhuangzi? Can I get on the phone with Xiao Yu?"
Zhang Yumeng smiled and said, "Nonsense, of course. Although mass production is still a bit difficult now, each component has been put into assembly lines. However, the output is small and the scrap rate of vacuum tubes is a bit high."
Yang Qian waved his hand indifferently, "It's just some small defective products. It's okay. I can afford it. By the way, how far can this thing be controlled?"
Zhang Yumeng frowned and said, "I haven't tested this yet. Radio is theoretically unlimited, but there is still a distance limit affected by radio wavelength, dielectric loss, receiver sensitivity, transmitter power, and earth curvature."
"Generally, the non-relay transmission distance of microwaves is 40-50 kilometers. Short waves can propagate to hundreds of kilometers through ionospheric reflection, but are very unstable due to changes in the ionosphere. Long waves can generally propagate to places thousands of kilometers away."
"If that's not enough, you can build relay stations, which can enable microwave beyond-line-of-sight transmission."
"The function of a relay station is to amplify, shape and forward the received signal. In order to reduce the impact of the earth's curvature, microwave relay stations are usually built on top of mountain tops or erect relatively high transmission towers. This is mentioned in previous high school textbooks."
"But having said that, I know about the relay station, but judging from the current technology, it is still very difficult to achieve it in a short time. Moreover, it is too conspicuous. In a place without monitoring like this, it can be easily destroyed."
Yang Gan clenched his fists. Although he didn't understand what Zhang Yumeng said, he understood the last sentence. Build a relay station in a desolate place. There is no monitoring or anything like that. It will be destroyed by people or wild animals in minutes, and the repairs are not done. easy.
"Then tell me, under normal circumstances, how far can a call be supported?"
Zhang Yumeng rubbed his hands together and thought, "For 0.5 walkie-talkies sold on the market, the manufacturer's nominal maximum talking distance is 3 kilometers. This talking distance is just a theoretical calculation data."
"It is based on the transmission power, which means the maximum communication distance of a 0.5 walkie-talkie without obstacles and electromagnetic interference."
"In actual use, since the environments in which users are located are different, the background noise may be large or small, and the electromagnetic interference may be strong or weak, the actual call distance is generally less than 3 kilometers."
"Many users often mistakenly think that when buying walkie-talkies, the calling distance can reach 3 kilometers when used in cities. This is unlikely. It is impossible for manufacturers to predict the user's usage environment, and of course it is impossible to give the actual calling distance.":
"Of course, our current environment is very good. There is no interference from all kinds of radio waves, and there are no high-rise buildings. What's great is that it's limited by the terrain. However, most of the north is plain, so it's not a big problem."
"General data is that a 5-watt professional phone can support a distance of 2000-5000 meters, a 2-watt handheld phone can support a distance of 1000-3000 meters, and a 0.5-watt civilian phone can support a distance of 200-1500 meters."
"Pa~!"
Yang Gan said excitedly, "Isn't it true that as long as the power is increased, the distance can be extended, right?"
Zhang Yumeng nodded and said, "That's the theory, just wait a moment."
She ran out of the tent quickly, and not long after, she saw two soldiers of black armor cavalry walking in from the outside carrying a fusiform metal rod.
Judging from their expressions, it was obvious that this thing was not light, on the contrary, it was a bit heavy.
"Handle it with care, don't knock it~~~!" Zhang Yumeng stared at the two soldiers carefully and kept reminding them.
The two soldiers were also big and round. Although it was heavy, it was still a piece of cake for them. If they were not afraid of breaking this thing, they could carry it alone.
After the two carefully put down their things, they handed over their hands and went out. Zhang Yumeng pointed to the fusiform metal rod on the ground and said.
"This is the supporting component of the wireless phone."
Yang Qian asked curiously, "What is it? It looks really weird, tsk tsk tsk, how much metal does it need to be used."
"Tch, a little metal is nothing. The parts inside are all made of brass, pure brass, and some aluminum."
Yang Qian's mouth twitched hard. Copper is very common in modern society, but you have to understand what it was in ancient times.
Coins are made of copper. Making such a thing is equivalent to using money to make something.
"What does that do?"
Zhang Yumeng smiled and said, "You think, if the power of the wireless phone is adjusted too high, it will put a lot of pressure on the internal components, but if it is appropriate and does not damage the wireless phone, it will only last 50 to 100 miles."
"For example, from Yuntong County, at least seven strongholds have to be deployed, and different people in charge will relay a sentence to the final destination. Although the time is already beyond the time compared with the order."
"But the shortcomings are also very huge. If it is a sentence, it is simple, but if it is a report, it will require a lot of records. Over time, there will definitely be a possibility of recording errors."
"Furthermore, the more people you deal with, the greater the risk that many secrets will be exposed. I think this is something you don't want to see."
We provide you with the fastest update of "The Battle of the Deer Begins from the Warring States Period" by the master Yu Ge Piaomiao. In order that you can check the fastest update of this book next time, please be sure to save the bookmark!
Chapter 443: The Artifact of the Kingdom is free to read.
