Graycastle, Neverwinter.
The report on the battle on Grand Duke Island and the situation in Wolf Heart was sent to Roland two days later.
Compared to the previous time it took a week to send a letter from Evernight City in the North to Neverwinter, such a communication speed had to be said to be a huge improvement. Whether it is short-distance express by flying messenger or long-distance running of steam ships day and night, they are now integrated into a part of the messaging system, and every important message will be equipped with a special person, a special ship, or even a plane. This time The report was sent by Tilly.
"Thank you for your hard work." Roland greeted him warmly and handed out the Chaos drink, "Is the situation over there okay?"
"You don't know if you read the report?" Tilly took the cup and glanced at him, "Being so diligent, what are you feeling guilty about? Is it because I haven't got a clue about my special machine?"
"Pfft..." Nightingale's choked laughter came from behind.
"How come, I have selected the most suitable one from several plans. As long as Anna has time, the trial production can be started immediately." Roland said quickly, "You know, several projects have arrived recently. The most crucial step, she is really too busy."
"For Anna's sake, I won't care about you this time, brother." Tilly drank the drink, wiped her mouth and walked out of the office, "The Seagull will be returning soon, I'll go back first. Aerial Knight Academy."
"Don't stay for a day?" He asked slightly surprised.
"No way, the only ones who can threaten the Vault of Heaven on the front line are the Seagull and Andrea, and... I don't want to miss any chance for revenge." Tilly waved her back to him, "Then I'm leaving, brother. ."
Looking at the door that was closed again, Nightingale sighed softly, "Everyone...all are working hard."
If possible, I would prefer that they work on other things than war. Roland had such thoughts in his heart, but he didn't say it because no one could rest from this burden before the end of the War of Divine Will, before the fate of mankind was decided. Saying this now makes no sense other than evading responsibility.
After a moment of silence, he opened the report seal.
After reading all the reports, Roland finally understood the meaning of Tilly's words. Edith Kant and Andrea were undoubtedly the biggest contributors to this battle, who could issue an order to retreat in time and successfully ambush a demon king who had come and gone without a trace on the vast sea. But in the same way, the sender of the key information cannot ignore the victory without this person's desperate effort.
"What are you going to do?" This matter obviously attracted Nightingale's attention.
"No matter what his original intention of sending this secret letter was, this person's name and achievements should not be forgotten." Roland said solemnly. If it is a previous life, it is almost impossible to find an unidentified eyeliner after the long war. I am afraid that there can only be left on the tombstone something like "Your name is unknown, your achievements will last forever". 's inscription. However, witches can change this unavoidable situation, so that every soldier who has contributed to the destiny of mankind can be remembered in the long history. "Wait until the Kingdom of Eternal Winter is back under the control of the First Army, and let "Black Money" cooperate with A-Xia to confirm his identity and origin. "
If the murderer who killed him was still alive at that time, he would certainly not be able to escape the severe punishment of the law.
Nightingale nodded, "If only the device you mentioned that can communicate across thousands of miles would have been manufactured sooner."
"Unfortunately, that's not my director." Roland couldn't help rubbing his forehead, and when he thought of the circuit diagram he forcibly memorized, he felt a huge headache.
"Now you can finally understand how I felt during the exam." Nightingale covered her mouth.
"But no matter how difficult it is, I won't fall asleep on the table like someone else, and I can only hand in a blank paper in the end," Roland glared at her, "In fact, I'm almost finished making the prototype. "
Yes, the radio project never stopped, albeit at an extremely slow pace.
Like the piston engine, after considering the many proposals of the Greycastle Design Bureau, he decided to choose two of them to carry out at the same time.
These two are spark transmitters and AM transmitters.
The former is the originator of radio waves, the structure is extremely simple, without any electronic components, just use the transformer coil to increase the voltage to charge the capacitor, until the voltage loaded by the capacitor between the spark gap is high enough to break down the air, and then discharge electricity. spark. This part is a bit like a lighter, except that the current passed by the spark is not wasted, but repeatedly oscillates between the capacitor and the inductor, causing it to generate electromagnetic waves, and finally through the antenna, these electromagnetic waves are emitted.
In other words, as long as the power supply is controlled on and off, intermittent electromagnetic cracking can be issued. According to the length of the sound, the receiver can translate it into a corresponding signal. The so-called long and short telegram codes come from this.
Although it still sounded a little confusing, Roland used the most tricky method, that is, first let the radio project team of the Graycastle Design Bureau use readily available materials to build a workable real object, and then copy the real object.
For example, clamp two pieces of tin foil up and down on a stack of oil paper, and then seal it with wax, which is a simple high-voltage capacitor.
Inductance, on the other hand, is much simpler, and is nothing more than wrapping a wire around an insulating tube.
These devices can be completed by Roland alone, regardless of mass production or specifications. Although compared with those industrial products that are only the size of a fingernail after encapsulation, they appear thick and rudimentary, but the effect is basically the same. Once the tower is built, he will be able to attempt the first wireless transmission experiment of this era.
However, the shortcomings of the spark transmitter are also obvious.
Even if it passes the test, if it is to be put into formal use, a set of codes that match the kingdom's script must be designed, and the training of senders and receivers will take a lot of time. In addition, the frequency spectrum of the spark transmitter is extremely wide, and only one transmitter can work within 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 terms of principle, radio communication and telephone are very similar in nature. They both convert the vibration of sound into changes in current or electromagnetic waves, and then re-transform into sound after long-distance transmission to the other end. It's just that the frequency of human voice is too low, which makes the wavelength of the signal wave too long, and the longer the wavelength, the larger the size of the antenna required. If the voice signal is directly transmitted, the length of the antenna may reach more than 100 kilometers. This is an engineering problem. An impossible thing.
Therefore, if you want to transmit voice, you must ride on a carrier with a higher frequency.
This is called modulation.
After the new waveform mixed with the two is accepted, the listener must also filter out the high-frequency wave through a series of demodulation methods, leaving only the meaningful low-frequency wave, which can be converted into the final speech.
Once the AM transmitter is successful, both the First Army and the intelligence agencies will have real-time communication capabilities.
For war, its significance is self-evident.