Release that Witch Chapter 1313: “Information age”

Greycastle, Neverwinter City.

A report on the Grand Duke Island battle and the situation of Wolf Heart was sent to Roland in two days.

Compared to the previous letter sent from northern region Eternal Night City to Neverwinter, it will take a week. Such a speed of communication cannot help but be said to have improved greatly. Whether it is a short-distance express delivery of a messenger or a long-distance journey of a steam ship, it is now integrated into a part of the messaging system. Each important message will be equipped with a dedicated ship or even an aircraft. This time The report was sent by Tilly.

"It's hard for you." Roland shudderly asked Chaos Drink, "Is situation over there okay?"

"Don't you know if you read the report?" Tilly took the cup and glanced at him, "You are so diligent, what are you guilty of? Is my special machine not a little clue?"

"Why ..." behind the Nightingale laughter.

"How come, I have selected the most suitable one from several plans. As long as Anna is free, I can start trial production immediately." Roland quickly said, "You know, several recently The project has reached the most critical step, and she is really too busy. "

"For the sake of Anna, I won't care about you this time, brother." Tilly drank the drink, wiped his mouth and walked out of the office, "The Seagull will return soon, I'll go first Back to Aerial Knight school. "

"Don't stay all day?" He was slightly surprised.

"No way, now only The Seagull and Andrea can threaten Vault of Heaven Lord on the front line, and ... I don't want to miss any chance of revenge." Tilly waved his back to him, "So I'm gone, brother." /

Looking at the re-closing door, Nightingale sighed softly, "Everyone ... is working hard."

If possible, I hope they work harder in other areas than in war. Roland bottom of heart raised such a thought, but did not say that because before the end of War of Divine Will and before the fate of humankind was decided, no one could rest the burden. Now that this is meaningless except to avoid responsibility.

After a moment of silence, he opened the seal of the report.

After reading all the reports, Roland finally understood the meaning of Tilly. It was able to issue a retreat order in time and successfully ambushed a disappearing Devil Monarch, Edith Kant and Andrea in the vast sea. This is undoubtedly the biggest contributor to this battle. But again, the sender of that key piece of information cannot ignore the victory without this person's desperate effort.

"What are you going to do?" This matter obviously also attracted the attention of Nightingale.

"No matter what the original intention of this secret letter is, this person's name and merit should not be forgotten." Roland whispered. If it is a previous life, it is almost impossible to find another unidentified eyeliner after the end of the long war. I am afraid that only something like "Your name is unknown and your achievements will last forever" on the tombstone Inscription. However, witch can change this last situation, so that every soldier who contributes to the fate of humanity can stay in the history. "Wait until Kingdom of Eternal Winter returns to the control of First Army, let" Black Money "cooperate with Asia to confirm his identity and origin. "

If the killer who killed him at that time is still alive, he will inevitably escape the severe punishment of the law.

Nightingale nodded, "If only the device you said can communicate over thousands of miles would be manufactured earlier."

"Unfortunately, that's not what I'm good at." Roland rubbed his forehead, thinking of the circuit diagram forced down memory, he felt a headache.

"Now you can finally understand how I felt during the exam." Nightingale covered his mouth.

"But even if it's hard, I won't fall asleep on the table like someone, and finally I can only hand in a blank scroll," Roland glared at her, "In fact, I have almost completed the principle of prototype Made. "

Yes, despite the slow progress, the radio project has never stopped.

Like the piston machine, after considering many options of Greycastle Design Bureau, he decided to choose two of them at the same time.

These are the spark transmitter and the AM transmitter.

The former is the originator of radio waves. Its structure is extremely simple. There are no electronic components. It only uses a transformer coil to increase the voltage to charge the capacitor until the voltage loaded by the capacitor between the spark gaps is high enough to penetrate the air. Further, electric sparks are emitted. This part is a bit like a lighter, but the current passed by the spark is not wasted. Instead, it repeatedly oscillates between the capacitor and the inductor to generate electromagnetic waves. Finally, the electromagnetic waves are transmitted through the antenna.

In other words, as long as the power supply is controlled to open and close, it can issue intermittent electromagnetic disconnection. Depending on the length of the beep, it can be translated into a corresponding signal. The so-called long and short telegraph code is from this.

Although it may still sound a little confusing, Roland has adopted the most deft approach, which is to let the radio project team of Greycastle Design Bureau use readily available materials to create a usable physical object, and then copy the physical object over.

For example, it is a simple high-voltage capacitor by sandwiching two pieces of tin foil up and down on a stack of oil paper and sealing it with wax.

Inductance is even simpler. It is nothing more than winding wires around the insulation tube.

Under consideration of mass production and specifications of situation, Roland can be completed by itself. Although compared with industrial products that are only the size of nails after being packaged, they appear coarse and simple, but the effect is basically the same. When the tower is built, he can try the first wireless transmission test of this era.

But the shortcomings of the spark transmitter are also obvious.

Even if it passes the test, if you want to put it into formal use, you must design a set of codes that match the characters of the kingdom. The training of the reporter and the receiver will take a lot of time. In addition, the spark transmitter has a very wide spectrum, and only one transmitter can work in the same range, which is not suitable for front-line intelligence personnel.

So his ultimate goal is still an AM transmitter that uses a tube to amplify the signal.

The biggest advantage of the latter is that it can directly transmit voice signals.

In principle, radio communications and telephones are very similar in nature. They both convert the vibration of sound into changes in current or electromagnetic waves, and then retransform into sound after reaching the other end through long-distance transmission. It's just that the human voice rate is too low, making the wavelength of the signal wave too long, and the longer the wavelength, the larger the size of the required antenna. If the voice signal is directly transmitted, the antenna length may reach more than 100 kilometers. This is engineeringly An unachievable thing.

So if you want to deliver the voice, you have to take a higher frequency carrier.

This is what is called modulation.

After the new waveform mixed with the two is accepted, the listener must also filter out high-frequency waves through a series of demodulation methods, leaving only meaningful low-frequency waves to be converted into the final speech.

If the AM transmitter is successful, both First Army and intelligence agencies will have real-time communication capabilities.

For war, its meaning is self-evident.