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Chapter 1731 The Grandpa of Radio

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    The main reason why he didn't succeed was that he was too busy, working day and night, so how could he have time to invent?

    ????????????????????????????????? Well, it¡¯s definitely not that he has high ambitions and low abilities, and he is not the material for scientific research

    But Youdao¡¯s merits are not in vain. At least after a few years of hard work, he figured out all the technical difficulties and how to take the next step.  So in the fourth year of Wanli, when this glorious and arduous task was handed over to Zhang Jian, he clearly pointed out the direction and steps of the research!

    First, Zhao Hao decided to bypass wired telegraphy and go directly to radio!

    Although the wired telegraph is simpler in principle, long-distance transmission is a big problem.  Especially since he needed to cross several oceans, just thinking about how to manufacture and erect tens of thousands of kilometers of cables gave him a headache.

    Manufacturing is actually not bad. The group¡¯s wire drawing machines are very mature and can supply barbed wire for use by the Coast Guard. It is not technically difficult at least to draw tens of thousands of kilometers of copper wire.

    And the gutta-percha used in submarine cable wrapping can be extracted from Eucommia gum.  Or it is not too difficult to directly find ancient tapas trees in the rainforests of Southeast Asia.

    But the question is, how to erect these tens of thousands of kilometers of cables?  When you need to build telephone poles on land, the copper wires are covered with rubber!  Why don't you put up the wire at the front and let someone cut it off at the back?

    ¡°Okay, even if he goes all out, he sends tens of thousands of people to garrison along the line.  But what about the undersea section of the line?  Although there is no need to worry about people stealing it, with the current technical level, he has no confidence that the wires can be connected to tens of thousands of kilometers without the rubber cracking at all.  Wherever there is a crack and the copper wire comes into direct contact with seawater, the current will dissipate and communication will be interrupted.  I don¡¯t even know where to practice.

    ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? Doesn¡¯t that clearly tell Europeans how to achieve long-distance communication?

    Radio is much better. Small radio stations are extremely confidential. As long as the confidentiality regulations are strictly followed, it is possible to maintain confidentiality for a long time.

    No matter how we keep it secret, our opponents will eventually guess in the future that we have a secret method for long-distance communication.

    But you can also rely on mystification to confuse snoopers, such as describing radio technology as the Taoist technique of "transmitting sounds across thousands of miles."  If you want to learn, go to a Taoist temple to become a disciple and practice

    This is Zhao Hao¡¯s original intention of naming the Electromagnetic Research Institute as the Taoist Research Institute.

    ??~~

    How was radio technology born in another time and space?

    It comes from the relay of several scientific greats who tortured middle school students.  In 1820 AD, Oersted discovered the physical phenomenon that electric current can produce magnetism.

    Eleven years later, Faraday discovered the law of electromagnetic induction on this basis.

    Another 42 years later, Maxwell proposed the electromagnetic field theory and described some characteristics of electromagnetic waves, laying the theoretical foundation for the birth of radio.

    Fifteen years later, Hertz discovered through experiments that applying high voltage to both ends of the coil caused it to spark. At this time, electric waves were emitted from the sparks, which could cause the distant coil to generate current. For the first time, electric waves were generated and received in the laboratory.  .

    At this point, all the conditions for the production of radio have matured. Unfortunately, Hertz did not expect the great use of radio and only published a paper on his research.

    ¡°As a result, the peach was picked by Marconi in Italy within a few years Of course, the Russians insisted that it was Popov who invented radio.

    What Zhao Hao is planning to restore is the spark transmitter invented by Popov.

    Its structure is very simple and does not require transistors, electron tubes, or any electronic components beyond the level of the 16th century. The required materials are completely within the manufacturing capabilities of the Xishan Island Research Center.

    You only need to collect seven dragon balls to summon the dragon.  Only seven parts are needed to form a spark transmitter that can be used normally and spread thousands of miles.

    The seven components are: key, battery, boost coil, capacitor, spark gap, antenna and ground wire.

    When the electric key is closed, the strong current provided by the battery is converted into high-voltage electricity through the booster coil and loaded into the capacitor.  The capacitor is connected to the metal balls at both ends of the spark ball.  When the voltage applied to the two metal balls on the spark gap between the two poles of the capacitor is high enough to penetrate the air gap, a spark discharge occurs.

    According to the principle of electromagnetic induction, spark discharge generates oscillating electromagnetic waves. The electromagnetic waves radiate outward through the antenna and are radio waves.

    By controlling the length and interval of the electric key closure, long or short radio waves can be obtained, which can be encoded according to certain rules and used to transmit information. This is radio transmission.

    The next step is how to produce the parts that meet the needs one by one.

    ? Electric keys? two small copper balls just a few centimeters apart.  Xu Guangqi added a slide to one of the small balls. By turning the wooden bolt on the side, the distance between the copper balls can be changed, thereby changing the emission power.

    As for the sixth antennait's simpler than a spark gap, and there's nothing much to say about it.  The longer it is, the better.

    The seventh bottom line is to tie a copper plate to the wire and bury it on the ground.

    Zhao Hao has always felt that he can be called the father of radio by making five out of seven components.

    But he saw that in addition to the seven-piece set, there was another device on the table - two spiral copper strips coiled like mosquito coils, mounted on an insulated wooden shaft.  One plate of mosquito coils is connected to the antenna and bottom line, and the other plate is connected to the capacitor and spark gap.

    The eighth component added by Xu Guangqi is an adjustable inductor, which can fix the frequency of electromagnetic waves at a certain value to achieve confidentiality and selectivity of communication.  This was something Zhao Hao never thought of before.

    Mr. Zhao weighed his conscience and gave up the title of father of radio to Xu Guangqi.

    Then I am the grandfather of radio, which is not bad (Remember the website address: www.hlnovel.com
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