Datang: Li Shimin begged me to rebel

The things Li Ke took out before he was about to leave. He planned to take out a total of twelve sets of large radio base stations, the kind of building signal towers. In fact, the signal towers don’t need to be of high specifications, let alone modern standards. Higher is fine.

Then prepare another set of wearing parts, which are all produced at the modern military level.

In terms of military industry, you can't say it is advanced, but it is definitely based on the first principle of durability, so there is no doubt about its service life, at least these students who have been silently sticking to it until the Tang Dynasty have no problem at all with their own radio. .

These things are first of all to set up one in each of the eight directions. For the time being, the Western Region is assumed to be in the Yili River Valley, which will be the forefront of the Tang Dynasty for a long time.

Naturally, the north side is supposed to be where Xue Yantuo's royal court is, the northeast part is supposed to be in Youzhou, and the east side is supposed to be in Hudu, or Shanghai.

On the south side, due to special circumstances, Guangzhou Port is first, then Lizhi Port, Lizhi Island and Lizhi Strait have to be built here.

On the southwest side, Li Ke's idea is to build one in Lhasa in later generations, and then build one in Dongyang Peninsula, which is the Oman Peninsula in later generations.

This is eight sets, and considering that it is more difficult to transmit messages in mountainous areas such as Shu, one will be built in Kunming and other places in later generations, which is ten sets.

The remaining two sets are flexible. If Monobe Murashita cleans up Oceania, one will definitely have to be built there.

The remaining set can be used anywhere at that time. This is the approximate arrangement of twelve sets of large-scale wireless devices. In addition, Li Ke is going to take out ten sets of medium-sized wireless devices.

There are many ways to generate power for large radio devices. The best way is naturally to provide a generator directly by Li Ke, but he does not have this. The other is to drive a generator with a steam engine.

In fact, this is not difficult. In addition, many indigenous methods in the founding period of the country are very useful, such as wooden water turbine power stations. This kind of small hydropower station is built with wood. It is simple to build and does not need to be too high for power generation.

This so-called large-scale wireless device actually requires only [-] kilowatts of power. With Datang's current industrial foundation, various methods can be used to achieve the power generation efficiency of [-] kilowatts.

Not difficult.

The simplest is a direct steam boiler. Coal, wood and other things can be burned to achieve a power generation efficiency of [-] kilowatts without using much fuel.

Paired with the modern batteries that come with these large radios, they can basically generate electricity for a day and last for a long time.

The ten sets of medium-sized wireless devices are arranged in some densely populated areas and important grain-producing areas. These areas are all within the territory of Datang, and there are signals from large wireless devices around them, so they can definitely be contacted.

The method of generating electricity for these medium-sized radio devices is even simpler, either by stepping on a generator or by a simple generator pulled by a pack horse.

Anyway, there are batteries that can store electricity, as long as the batteries are charged.

With infrequent use, their battery power can last a long time.

For example, what Li Ke found in the database, such as the many methods of the Tuba Road period, such as soaking the batteries in salt water to improve the power problem, Li Ke can not use it now.

In fact, the best way is to directly divide the photovoltaic power generation panels that Li Ke took out into more than a dozen parts and place them in their respective places, so that they can generate electricity continuously. Anyway, the battery stores power, so there will be no shortage.

But that thing Li Ke didn't want it to spread.

Let's arrange it like this first.

After sorting out these things in the warehouse first, Li Ke left the warehouse and went to Lu Daqiang and they found a group of students who were particularly good at electromagnetism.

Since it is going to be taken out, it must be shown to Lao Li, and then the communication department will be placed under the management of the intelligence department.

So after finishing it, Li Ke went directly to Liangyi Hall to find Li Shimin.

"Father, I'm leaving, but before I leave, there's something I'm worried about, and I want to figure it out." Li Ke said directly when he came up.

"What's the matter?" Li Shimin pressed calmly, did it happen?Something new?Good to have something new!Isn't that good?The more the better, the more the harder it is to get out, the harder it is to shake off.

"Clairvoyance and wind ears." Li Ke said very simply.

"What?" Li Shimin thought he heard it wrong.

"Clairvoyance is a kind of long-distance communication device." Li Ke said, "In other words, sound transmission through thousands of miles."

Li Shimin: "?"

Are you telling me fairy tales?Your father, I just want to trick you into becoming an emperor, good guy, you are going to tell me a myth now, right?how?Are you going to tell me that you are a god reincarnated?

Looking at Lao Li's confused eyes, Li Ke said helplessly, "Father, in short, there is an invisible signal transmitting in our air, and I call this kind of signal electromagnetic waves, for example, light waves. It's an electromagnetic wave."

Li Shimin: "?"

He felt that he was listening to the scriptures, listen to what you are talking about, just what electromagnetic waves?What are electromagnetic waves?Also, how can you identify what it is?How to identify?Can you catch the light?

Why can I understand every word you say, but I can't understand it together?

"Well, we can use a device to emit an electromagnetic wave that has the same characteristics as light, and then build another device thousands of kilometers away to receive this electromagnetic wave, and then transmit it Transform it into a signal that we are familiar with, and by specifying information compilation for the signal, we can achieve the purpose of transmitting information thousands of miles away." Li Ke tried to explain to Li Shimin in plain language.

Li Shimin: "???"

"If you don't want to say it, you don't have to say it." Li Shimin looked at Li Ke and said, although there is only Chang Lin in this room, but you deliberately make it look like your father is very uneducated and illiterate, you still have to be beaten, you know?

"Oh, anyway, dad, you know that I have a way to send messages thousands of miles away." Li Ke was helpless, how the hell did I explain it in an easy-to-understand manner?It's too common, Li Shimin thought he was telling a story, it was too scientific, and Li Shimin didn't learn this, how could he understand it.

"Okay, tell me, how long will it take for you to spread the news?" Li Shimin said while suppressing his distrust.

"One second." Li Ke opened his mouth and said.

Li Shimin: "???"

Are you teasing your father and me?