Chapter 249 Broadcast

Under Zheng Fuguang's introduction, Zhu Jingyuan carefully observed the dot matrix imaging fax machine.

Then I went to see another important invention - the negative feedback triode signal amplifier.

In layman's terms, it is a tube amplifier, which is later called a "tube amplifier" in the music circle.

Of course, what anyone who plays music does is retro, but what Zhu Jingyuan does now is considered pioneering.

Before the advent of amplifiers, telephones and phonographs had speakers.

But they are all directly driven by the sound source signal, and there is no signal amplification process, so the sound cannot be very loud.

Just like a passive speaker plugged directly into the headphone jack of a computer or mobile phone.

You can make a telephone receiver, but you can't make a loudspeaker for broadcasting.

At present, wherever shouting is needed in the world, people with loud voices still do it.

At most, you can add a tin speaker to emit sound in a directional manner through physical effects and increase the volume in the target direction.

With a power amplifier, it's different. You can continue to broadcast high-intensity speeches over a large area.

And it is also an important equipment required for public broadcast of movies.

"Lattice" is a future-oriented technology and design, and it is a basic technology in information dissemination and recording, so the current performance is not very intuitive and strong.

The signal amplifier is the technology at the end of information transmission, and the display is very intuitive and revolutionary.

Zhu Jingyuan stood in front of a workbench, looking at a brand new microphone in front of him, and then at the two specially made large loudspeakers placed on the other side of the room.

Zheng Fuguang checked the equipment and powered on the speakers and microphones.

"Zi——"

The typical noise of old-fashioned speakers that Zhu Jingyuan remembered from his previous life sounded, which made Zhu Jingyuan think that there should be no problem with this design.

After all, the power amplifiers and large loudspeakers that have just been made will not cause any problems such as buzzing when turned on.

The loud blast indicates that the speaker is loud enough.

After the noise was reduced to an acceptable level, Zhu Jingyuan also gathered his emotions and began to read poetry into the microphone:

"Wind and rain bring spring home, and snowflakes welcome it.

“The cliff is already covered with hundreds of feet of ice, but there are still beautiful flowers and branches.

“Qiao doesn’t fight for spring, she only repays it when it comes.

"When the mountain flowers are in full bloom, she smiles among the bushes."

The two loudspeakers vibrated with Zhu Jingyuan's voice, and a huge and surging sound came out.

Compared with later generations of high-end speakers, the noise and noise floor of this thing are a bit loud, but it's acceptable.

Zhu Jingyuan himself was quite satisfied and directly gave instructions on the spot:

"Okay, this thing is very important. If there are no problems, we can mass-produce it as soon as possible.

"They are all used in government offices and dental offices in various places, as well as in newly built large warships, especially aircraft carriers.

"It's a waste of manpower to arrange a group of strong men to be responsible for shouting."

The craftsmen headed by Zheng Fuguang immediately nodded solemnly and agreed:

"Understood... Your Highness, don't worry..."

Craftsmen may not be able to see all of the great role and potential of power amplifiers, but they are all aware of its importance.

It will be an epoch-making super invention that will affect countless industries such as military, administration, education, art, culture, propaganda, etc.

Warships and armies gathered personnel, delivered public orders, broadcast announcements in government offices and dental offices, and played music in large-scale spaces.

Turning newspaper content into recordings and playing them directly through loudspeakers is a new form of media.

In special areas, targeted speeches may also be made to enemies and hostile forces, and prepared sounds can be played in a continuous loop.

Zhu Jingyuan stayed in the laboratory for a whole day and continued to observe and inspect two new pieces of equipment.

Write down all the problems you can think of and possible improvements and optimization directions.

Let Zheng Fuguang sort it out and send it back to the Ministry of Industry and the factory of Daming Airlines.

When Zhu Jingyuan left, Zheng Fuguang couldn't help but ask his companions:

"The poem His Highness recited at that time...does anyone remember it? Does it really feel so strange to me?"

A group of craftsmen looked confused and shook their heads to express that they had never heard of it. Then someone said:

"Is there a possibility that the words His Highness recited at that time were written by His Highness himself?"

The scene immediately fell into silence. I confirmed that I had never seen this poem before, and then tasted it in my heart.

There are many poems praising plum blossoms, but the angle of this poem is very unique and has great connotation.

After the Renwu Dynasty, the Ming Dynasty established a relatively standard collective school education, and the educational content also shifted to natural sciences.

But the traditional Chinese language courses are still very important, far more than Zhu Jingyuan’s previous life.

In various examinations, the proportion of Chinese language is basically around 40%.

Since there are no foreign languages, the proportion of other courses is similar to Zhu Jingyuan’s previous life.

Students who graduate from regular middle schools are basically good at reciting poems and writing lyrics. College students are not much different from the traditional literati in the past.

But being able to write poetry and writing good poetry are completely different concepts.

Zhu Jingyuan has never shown that he has this ability before.

Today's inadvertent performance made the craftsmen a little surprised.

Zhu Jingyuan himself was not prepared to be a copywriter, so he just randomly found a poem and recited it.

I forgot to tell the age of the poem, I just finished reading it as soon as I started speaking.

I returned to my room, had dinner with my mother and two concubines, and started studying the typewriter and computer the next day.

Zhu Jingyuan himself understood that there was actually a demand for Chinese character typewriters.

As industrialization becomes deeper and deeper, the pace of society becomes faster and faster, and there are more and more writing-related jobs.

The scope of use of purely transactional words is getting wider and wider, while the proportion of the scope of use of artistic and literary words is getting smaller and smaller.

Correspondingly, the demand for flexible printing will increase.

Chinese character typewriters actually exist now, and they are similar to the Shu typewriters that appeared in history.

It is just a simplified movable type printing machine that requires manual pressing of each character.

Currently, not many people use it, and the official documents of the Ming Dynasty are still mainly copied.

Of course, what Zhu Jingyuan wanted to design was not this kind of typewriter.

Zhu Jingyuan stayed in the laboratory for most of the day, returned to his room in the afternoon, and began to write his own design plan.

Chinese character typewriters are very different from alphabet typewriters in logic, but some aspects can be learned from.

Tessie's alphabet typewriter was initially unable to switch between upper and lower case.

There are two sets of letter keys on a large typewriter, one for uppercase letters and one for lowercase letters.

Only one alphabet can be typed on a small, lightweight device.

Later, someone invented a switching device and a caps lock device that used the same letter key to type two letters.

In fact, the pattern of two letters is made on a metal piece in staggered positions.

On a Chinese character typewriter, all the keys may have to be switch keys.

You can no longer use a hammer to hit the paper for printing.

The number of hammers arranged side by side on a flat surface is limited, and it is destined to be unable to type at least several thousand Chinese characters.

The structure of a Chinese character typewriter must be three-dimensional.

A three-dimensional mechanical database must be able to accommodate at least thousands of commonly used Chinese characters.

At the same time, compile a reasonable search plan and associate it with the keys.

Use the keys to drive the mechanical database, or use auxiliary electric drive to filter out the required Chinese characters.

Turn the paper over and press it on the selected character template.

This keeps repeating.

There are two key points in making this thing.

One is a mechanical Chinese character database that contains nearly thousands of completed standard Chinese characters.

This design can refer to Lin Yutang’s design.

Historically, Lin Yutang painstakingly designed a rather clever Chinese character typewriter.

However, due to various reasons such as social environment, cost and manufacturing difficulty, it did not become popular in the end.
To be continued...