"Is that?" Roland couldn't help but be happy. When Barov's tone was clearly not just the facilities were built, "You also heard the signal sound?"

The so-called tower project is the first step in the radio communications plan. In order to meet the huge antennas required for long waves, the Ministry of Construction has set up a nearly 50-meter-high mail-high mail-receiver tower in Beiposhan and Yinguang City. Novels. More than half of the towers are only the size of the body of a human, so from a distance they look like a sharp and thin needle. With the retractable hydrogen balloon dragging metal wire, the length of the antenna can reach up to more than 100 meters.

In terms of construction difficulty alone, it does not have much praise, but the communication tower is a system project, and the transceiver equipment located below the tower is the key. Since electromagnetic waves will inevitably be emitted many times during the debugging process, even if it is a messy signal, it is normal to be captured by the other side in this world without any interference.

"That's right, your majesty." Barov replied excitedly, "It does currently have some kind of wonderful reaction spontaneously, as you said. It's just...I don't know if that was caused by Silver Light City."

"I think this question will be answered soon." Roland pondered for a moment, "notify the ministers of the Executive Office to go with them, they should not miss this opportunity to witness history."

...

After several years of development, Beiposhan is no longer the steep mining area with only a few narrow mountain roads. The wide cement roads and railway tracks are built along the slope. It only takes a quarter of an hour to reach the top of the mountain by train.

Not far from the iron tower, there is a row of simple red brick bungalows, and the low eaves are covered with ice ridges, which looks far less than the new factory buildings on the south bank of the Chishui River. In terms of appearance alone, it is difficult for anyone to associate it with the "new era".

Walking into the house, Anna was directing several sand people from the Original Strange Things Club to do the final preparations. When she saw Roland, she secretly made a gesture of "everything is right" and then she went to work seriously.

Roland couldn't help but grin.

As early as the radio program was set, this incident caused heated discussion in the Executive Hall. Most people can clearly realize what kind of changes the project will bring to the human world. If the message can be conveyed, it will be a huge enhancement in terms of the strength of war and the control of Wu Winter City.

Wired telephone, flying messenger and listening to the sign prove that under the combined effect of the three, the old noble forces in Grayburg had almost never found any chance of making a comeback. Many officials once believed that centralization would be a long-term and repetitive process, but the fact is that after they were overthrown by the First Army, they have not been able to cause any waves so far. The reason is that in the face of efficient information transmission, the nobles would be wiped out by the Second Army and even the police force as soon as they showed signs, and they did not even leave any room for brewing and development.

However, the phone has a wire at least, and the latter two are related to magic, which officials can barely understand. However, the tower project not only does not have any line connection, but also has a stronger theoretical effect than magical creations, which is really incredible. Although there is a basic introduction to electromagnetic waves in primary education textbooks, learning is learning, many people still have doubts about such invisible and intangible things. In a sense, it is more than imagined than biplane.

Of course, this hot discussion will not affect the actual progress of the project. After all, under the guidance of Roland, there are too many things in the winter city that can be called a miracle in recent years. Even if he suddenly announced that he would take the Red Moon, the Executive Office would do his best.

But radio is not his expertise after all, and his grasp is not as big as that of R&D mechanical equipment. This set of transceiver devices is completely replicated from the prototype of the Grayburg Design Bureau, and no one knows the actual effect. With Anna's gesture, he finally doesn't have to worry about being embarrassed in front of all the ministers.

"So, let's start."

Roland took Anna's hand and took her to the transmitter.

"Uh...Roland?"

"This is the crystallization of the engineering department. Of course you are the first tester." He blinked at the other party. Although he had known in advance that she confirmed the feasibility of communication during the debugging process, what would be recorded in history must be the next formal test.

“There is also a receiving location, who would you like to be the first to experience it?”

Barov and others looked at each other, raised their hands one after another and said, "Your Majesty, let me do it!"

After some competition, the boss manager successfully emerged from the crowd with his deepest qualifications and became one of the testers of "first" long-distance telegram communications.

Theoretically, the transmission and reception of telegrams can be completely done by one person, but it is obviously easier to verify the test results at this time. For people who have never seen a radio, the most critical point is how to make them believe that the other end hundreds of kilometers away has really received the information transmitted here? The easiest way is to let the uninformed recipient report the information that should only be known to the sender through the telegram.

After Roland briefly explained the test method, he blindfolded Barov's eyes. Anna drew three horizontal and two points on a small blackboard, with horizontal and long and short.

When everyone confirmed it, she pressed the transmitter's key.

Three long and two sections.

The moment the circuit was turned on, bright blue light burst out from the center of the spark gap.

Since the keys are not connected to the buzzer, there is no other movement in the room except this light.

Everyone couldn't help but hold their breath. The arc was so small that it was difficult to see even when standing outside the house, let alone Yinguang City, which was hundreds of kilometers away.

But Roland couldn't help but get goose bumps.

At that moment, he seemed to feel something passing by his body.

There is no doubt that it is an illusion that electromagnetic waves will not have any impact on the human body under low power. But in his mind, everything has a clear and identifiable picture. The electric fire seems to be fleeting, but the current transmitted is repeatedly oscillating between the inductor and the capacitor, up to tens of millions of times per second. The rapidly changing electric field quickly spreads along the antenna and the ground and spreads out in all directions.

In this quiet world, it is a cry made by humans. No one can hear its sound, but it is louder than any sound in the past.

Even after leaping hundreds of kilometers, the wave still did not disappear and was recorded truthfully by the antenna of Yinguang City.

It was greeted by two receivers.

After an ancient powder detector captured electromagnetic waves, the metal powder in the glass tube turned loose to condense, which caused the resistance in the circuit to suddenly decrease, and the originally extinguished light bulb burst out with a soft yellow light. Its biggest function is to inform the monitor that the cry echoed over the dome.

The other one is an ore detector. It does not require any external power supply and is always in the answering state. A piece of galena and the inserted wire form a natural semiconductor-like semiconductor. The energy radiated by electromagnetic waves forms a weak current inside it. You must wear a headset to hear the sound.

Without beep modulation, it does not make a crisp and pleasant ticking sound, but it still accurately reproduces the frequency at the time of transmission.

Then reverse the process.

Distance is no longer a problem. The faster the light is, it will be as fast as it is, or in other words, it is light itself.

Anna put down the keys after repeating three times.

According to the agreement, if Yinguang City receives the messenger here, it will send a exactly the same message. If it is a regular way of sending a letter, it will take about five to seven days to complete a round trip between the two places. If it is a flight messenger, it will take at least one day.

But the moment Anna put down the keys, the light on the receiver lit up.

It's only a few seconds before and after!

There was a commotion in the crowd.

Barov, blindfolded, knew nothing about this. He listened for a long time and finally slowly wrote down the message he heard on the paper.

When he took off his headphones and eye mask, he no longer had to ask about the test results and the surprise eyes that were revealed by everyone, the answer was self-evident.
Chapter completed!