"Really?" Roland couldn't help but be overjoyed, listening to Barov's tone, it was clear that it was not as simple as the facility had been built, "You also heard the signal sound?"

The so-called tower project is the first step of the radio communication plan - in order to meet the huge antennas required for long waves, the Ministry of Construction has erected nearly 50-meter-high transceiver towers in Beipo Mountain and Yinguang City. More than half of the towers are only the thickness of an adult's body, so they look like a long needle from a distance. Coupled with the retractable hydrogen balloon towing metal wire, the antenna length can reach more than 100 meters at most.

It doesn't have much to praise in terms of construction difficulty alone, but the communication tower is a system project, and the transceiver equipment located under the tower is the focus. Since electromagnetic waves are inevitably emitted many times during the debugging process, even a chaotic signal is normal to be captured by the other side in this world without any interference.

"Exactly, Your Majesty. Barov replied excitedly, "It does have some kind of wonderful reaction spontaneously, as you say. It's just that...... I don't know if that's caused by Silverlight City. ”

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

......

After several years of development, the North Slope Mountains are no longer the precipitous mining areas that were originally accessible by a few narrow mountain roads, but are built along the slopes along the wide concrete roads and railroad tracks, and it only takes a quarter of an hour to reach the summit by train.

Not far from the tower, a row of modest red-brick bungalows, with a row of ice edges hanging from the low eaves, looked far less imposing than the new factories on the south bank of the Chishui River. In terms of appearances alone, it is difficult for anyone to associate it with the "new era".

Walking into the house, Anna was directing several of the original sand people of the Curious Creatures Society to make the final preparations, and when she saw Roland, she secretly made a gesture of "everything is in order", and then threw herself into her work seriously.

Roland couldn't help but grin.

As early as the beginning of the radio plan, the matter caused a heated discussion in the Executive Office. Most people are well aware of the changes the project will bring to the human world. If the news can be delivered, it will be a great increase in both the strength of the war and the control of Neverwinter.

The wired telephone, the flying messenger, and the listening sigil are proof of this—the combination of all three has seen little prospect for the old aristocracy of the Grey Keep to make a comeback, and many officials had thought that centralization would be a long and iterative process, but the fact is that they have not been able to make any waves since they were overthrown by the First Army. The reason is that in the face of efficient information transmission, the aristocracy will be exterminated by the Second Army and even the police force as soon as they show the slightest hint, leaving no room for even some brewing development.

However, the telephone has a wire, and the latter two are related to magic, and officials can barely understand it. But not only does the tower project not have any line connection, but the theoretical effect is stronger than that of the magic creation, which is really incredible. Although there is a basic introduction to electromagnetic waves in primary education textbooks, many people are still skeptical about such things that cannot be seen or touched. In a sense, it's more unimaginable than a biplane.

Of course, this heated discussion will not affect the actual progress of the project, after all, under Roland's guidance, there are too many things that can be called miracles in Neverwinter City over the years, even if he suddenly announces that he will ascend to the Red Moon, the Executive Hall will go all out.

It's just that radio is not his specialty after all, and his grasp is not as big as the research and development of mechanical equipment, and this set of transceivers is also completely copied from the prototype of the Gray Fort Design Bureau, and the actual effect is not clear to anyone. With Anna's gesture, he finally didn't have to worry about losing face in front of the ministers.

"So, let's get started. ”

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

"Uh...... Roland?"

"It's the brainchild of the engineering department, and of course you're the first tester. He winked at the other man. Although it was known in advance that she had confirmed the feasibility of communication during the commissioning process, it would be the next formal test that would go down in history.

"There's also a receiving location, which of you would like to be the first to experience it?"

Barov and the others glanced at each other, raised their hands and said, "Your Majesty, let me come!"

After some scramble, the old manager, with his deepest qualifications, managed to break through the crowd and became one of the testers of the "first" long-distance telegraph communication.

Theoretically, the transmission and reception of the telegram could be done by a single person, but it was obviously easier to verify the test results by separating them at this time - the most important point for someone who had never seen a radio was to convince them that the other end was actually receiving the message from the other side, hundreds of kilometers away, and the easiest way to do that was to have the unsuspecting receiver transmit information via telegram that should have been known only to the sender.

After Roland briefly explained the test method, he blindfolded Barov on the guard. Anna marked three horizontal and two dots on a small blackboard, with the horizontal representing long notes and dots representing short tones.

When everyone was sure that everything was correct, she pressed the transmitter's button.

- "Three lengths and two sections".

The moment the circuit was turned on, a bright blue light bloomed in the center of the spark gap.

Since the electric keys were not connected to the buzzer, there was no movement in the room except for this light.

Everyone couldn't help but hold their breath, this arc light was so small, it was probably difficult to see it outside the house, let alone the Silver Light City, which was hundreds of kilometers away.

And Roland couldn't help but get goosebumps.

At that moment, it was as if he felt something pass over his body.

There is no doubt that it is an illusion - in the case of low power, electromagnetic waves do not cause any effect on the human body. But in his mind, everything became a clearly recognizable picture. The electric fire seems to be fleeting, but the current transmitted repeatedly oscillates between the inductance and the capacitance, up to tens of millions of times per second, and the rapidly changing electric field spreads rapidly along the antenna and ground wire, and spreads out in all directions.

In this silent world, it was the cry of a human being—no one could hear it, but it was louder than anything before.

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

It was greeted by two receivers.

After an ancient powder detector captures electromagnetic waves, the metal powder in the glass tube turns from loose to condensed, which makes the resistance in the circuit drop sharply, and the originally extinguished light bulb blooms a soft yellow light. Its greatest role is to inform the listener that the cry is echoing above the dome.

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

In the absence of beep modulation, it doesn't produce a crisp and pleasant ticking sound, but it still accurately reproduces the frequency at which it was sent.

The next step is to reverse the process.

Distance is no longer an issue, light is as fast as it is, or rather, it is light itself.

Anna repeated it three times and then lowered the key.

According to the agreement, if Silverlight City receives a message from this side, it will send an identical message. It takes about five to seven days to complete a round trip between two places in the case of a regular mailing, and at least a day in the case of a flying messenger.

But the moment Anna put down the key, the light on the receiver came on.

It only takes a few seconds!

There was a commotion in the crowd.

The blindfolded Barov didn't know anything about it, he listened for a long time, and finally slowly wrote down what he heard on a piece of paper.

When he took off his headphones and blindfold, he didn't need to ask about the test results – the answer was evident from the surprised glances of the crowd.

The marks on the paper are exactly three horizontal and two dots!