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Chapter 905

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    ?Šuzai just did it, and immediately started the production of the village broadcasting station, recalling what he had learned in the past, and at the same time praised himself and said that he was worthy of being a top student

    Daye is perfecting the law in the archives room, and several experts from Lingshan in the medical hall are still discussing the feasibility of reviving the deceased.

    To make a loudspeaker for broadcasting Of course, a lot of preparation equipment is required. Professionals who have been baptized by work in this era are also indispensable. Of course, this kind of loudspeaker cannot be a radio station, but it is just on the poles at the entrance of the village.  It's just a cable broadcast, and the materials needed are easy to get.

    As the most important information dissemination tool in rural areas, this gadget has played an important role for a long time. Village cadres issue notices, arrange work, and provide convenient information through the loudspeaker. Villagers can also listen to the radio through the loudspeaker to learn about state affairs.

    It is precisely with the changes of the times and the improvement of people's living standards that people's production and lifestyles are also undergoing tremendous changes. In ancient times, this kind of horn was actually a "horn"!

    The difference is that the horn can only make a vast and desolate sound, while the broadcast can directly curse people So the front-end technology and the rear-end technology are essentially different in the way they are used. In ancient times, many things could be used  Find its prototype.

    Especially the tribe of the cow totem is best at making horns.

    Later, from the horn to the phonograph, from the phonograph to the reed horn The reed horn can be regarded as a landscape of modern China. At that time, the People's Posts and Telecommunications Publishing House also published the book "The Production of the Reed Horn".

    This kind of speaker is to install a coil at the front end of a horseshoe-shaped magnet, and there is a swingable metal piece in the middle of the coil. When an audio signal current passes through the coil, the magnetic field changes to make the metal piece swing, and it will also affect the paper cone to make sound.  The basin is made into a cylinder, and the magnet and tongue reed are installed in the cylinder, which can spread to all sides.

    Then, the more advanced ones are the dynamic speakers and cone speakers, which were called "roaring phones" at that time.

    Therefore, a side-mounted technological point of the speaker is the oldest telephone.

    There are many materials needed, such as permanent magnets, core posts, magnetic plates, paper cones, voice coils In fact, these things, like the original loudspeakers such as horns, could be obtained in primitive times.

    Yuzai first went to Yijun¡¯s factory to place an order. Yijun took the job with Yuzhu and others, requiring a lot of precise glass originals.  Tools, glass burning, etc., he let those newcomers or apprentices do it, but since the concubine requires precision parts, then he naturally has to show his skills in front of the gang of juniors.

    However, after Yijun saw the blueprint, his whole body fell into a pale and faded state.

    Although Yijun was a little flustered in his heart, in front of his apprentices and the workers in the factory, Yijun must pretend to be as stable as an old dog.

    Later, Yan Zai came to Danzhu's factory and asked him to make "plastic".

    Danzhu: "Su material? Is it a very serious material?"

    The earliest plastics were not made of petroleum. Although this plastic called "celluloid" has poor performance, it is simple and easy to obtain. It is one of the raw materials used to make gunpowder. Camphor is added to nitrocellulose, and then it is used to make gunpowder.  It can be obtained by dissolving it in alcohol. Its most common use is to make table tennis.

    But what I want to load is Bakelite.

    The ashes of charcoal are everywhere in the ironworks, and the sodium hydroxide is taken from Mr. Jiwotou Yunzhongzi in the explosion factory. Finally, the wood is boiled to produce juice. This is called wood dry distillation, or it is produced with ordinary quality coal.  , Produce methanol in this way, and then oxidize it with hot copper and air to become formaldehyde, and then throw the formaldehyde into a water bottle to get an aqueous solution, which is formalin.

    Combining the three into one, you can get Bakelite.

    Then there are gold wires. Gold is rarer than copper, and its conductivity is better than copper. However, in this world of mountains and seas, gold was not scarce in the ancient barbaric era. There are 114 places where gold is produced in Shanhaijing, some of which are  American copper, but there are also a lot of gold mines, which can be found in the south at a glance, not to mention that they can also trade with other tribes.

    Another large perfect horn, Yan Zai asked Niu Cun to help make it.

    Niu Village was very puzzled at the beginning, thinking that the concubine needed the enchanted horn that could send out floods, but that thing was really gone, and Niu Village was also in charge of the breeding statistics of animal husbandry, so he was very busy.

    However, Yu Zai said that it is not to enchant horns. Now the most powerful cow totem in the south is your village. This year, you have just won the advanced pacesetter. Don¡¯t refuse. Who else is this matter for you? The above has already decided  

      The wizard of Niu Village suddenly thought of the steel medal, his mind came alive, and he happily accepted the job.

    Then, you also need piezoelectric crystals, most commonly quartz.

    There are other things

    Hongzhou's research points are rising rapidly, Yan Zai is only focused on research, frantically clicking on the next round

    Then, it worked.

    ¡ª¡ª¡ª¡ª

    The Great Cold has arrived.

    It is the last solar term of the year, and the people of Hongzhou are purchasing grain and meat.

    Sheng Xiong's fish stall is extremely hot.

    In the name of "removing the old and welcoming the new", Yan Zai said that in order to praise everyone's hard work in the past year, a festival was set up.  Changes were made, so the ancient festival "New Year", which would have officially appeared when Emperor Shun officially succeeded to the throne, appeared ahead of schedule at this time.

    There are people coming and going in the farmer's market, and the leaders came here from the oil mill and erected a tall pillar, just beside the Xinyi pillar. There is also a strange thing hanging on this pillar, which looks like  Large corners.

    "The big horn of Niu Village?"

    "It's terrible, such a big hornis handmade, not naturally generated."

    Hongzhou does not have such a big cow. Of course, the horn was made by Niu Village with its own advanced horn making technology, and the materials used are copper and bone.

    "The essence of sound is vibration. When the pulse current passes through the coil on the speaker, the coil will generate magnetism. This magnetic force will repel or attract the magnet on the speaker, thus generating vibration and driving the speaker membrane to emit sound"

    The big horn is hung on the telephone pole, and the wind beasts are wandering around. This thing really looks like what it should have been in the primitive era, but its function has exceeded the imagination of people in this era.

    In the big horn, an electric sound suddenly appeared, and then, something shouted loudly!

    "Hi, hello good Listeners friends Hello everyone, welcome to the weather forecast from the Meteorological Observatory Hongzhou will be cloudy and cloudy tomorrow, with rain,  Please remember to bring rain gear when you go outTomorrow the temperature will be 18~14¡ãC, the temperature difference will be small, and the wind force will be less than level 3. Wild fires are prohibited in the forest Finally, I wish you all a happy life,  That concludes today's weather forecast, see you tomorrow."

    The moment the voice broadcast ended, the people in the entire market were shocked. They stared at the horn hanging on the wooden pole, and it was able to speak even though no one was blowing it behind it!

    "Is that some kind of treasure?"

    "Will utensils be spiritual?"

    "I can hear it, it's the voice of Chief Yinglong!"

    At this time, Yu Zai put her hands on her hips, looked at the big horn, and exhaled.

    The village is electrified!

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