Chapter 17 The Perfect Ore Machine

Old Xu looked at the wooden box in his hand in surprise.

At the beginning, he didn't notice it. He only felt that the wooden box was antique, but when he opened the lid, he found that it was a radio. When he saw the structure inside, he was even more surprised that it was actually an ore radio.

Lin Changming was surprised and puzzled when he saw Lao Xu, so he asked:

"Xu Lao, isn't this your thing? My boy has been insisting that he did it himself. Don't you think it's bullshit? If he could make a radio, the radio factory would have to close down?

"This is not mine." Old Xu shook his head at him, and then said earnestly, "Changming, your bad temper is really changed. Although Xiaohong doesn't seem to talk, he is very smart. You care too little about your children. As a father, you are so careless that you don't know your son at all..."

Hearing Lao Xu's words, Lin Changming nodded frequently, as if he was being taught. Thinking about it carefully, Mr. Xu is right. He really cares too little about his son, and there is no woman in the family to maintain it. Children from other families are regarded as the apple of their eyes by their parents at this age. They do something for fear of exhausting their children, and some trivial things in their own family have to be done by their sons at a few years old. Thinking of this, he can't help but feel a little ashamed.

At the same time, his heart was extremely shocked. He never expected that Mr. Xu valued his son so much.

"Is this radio really made by Xiaohong himself?"

Lin Changming looked at his innocent son, and his heart was very complicated, shocked, regretful, happy, gratified...

"Lin Hong, let's go to the room to see how your miner performs."

Old Xu was interested for a while. He had asked Lin Hong many times how the production process of the mining machine was. As a result, he was vaguely fooled by the other party. He kept saying that it had not been completed and was improving, but he did not expect that the other party had done the "ore machine" as a work of art.

Old Xu carefully held the ore radio in his hand and walked towards his room, with a little expectation in his heart. In his heart, he has always looked at Lin Hong differently and always feels that the child is spiritual. Looking at the works he has made now, they are really good-looking. And he just glanced at it a few times. The design of this ore machine is very thoughtful in many aspects, such as the design of the gate knife switch and the headphone interface, which is simply classic, with both safety and convenience.

Old Sun also followed him with a proud face and muttered in a low voice, "Hey hey, I have known this boy for a long time. Or will he be accepted as an apprentice?"

When he said this, his face was not red and his heart did not beat, and he did not feel that his master was incompetent at all. You know, since he taught Lin Hong three-style last time, he has never taught Lin Hong anything else. Occasionally, he just points out the three-style standing point.

Old Xu put the wooden box on his workbench, and then began to take out the external meter to detect some important parameters in the ore radio.

To measure the quality of an ore machine, first of all, lies in the Q value of the variable capacitor and coil, which is an important parameter for measuring inductive products. The higher the Q value, the smaller the loss, and the higher the efficiency. Secondly, there are the parameters of the forward pressure drop and sensitivity of the detector, headphones and antennas.

Lao Xu put on his presbyopia glasses and measured it with a multimeter for a long time. Finally, he sat upright and kept muttering to himself.

Lao Sun's head was on the tip of his ears, and he heard his old friend constantly saying words such as "wonderful... ingenious design... unbelievable..."

So he curled his lips and interrupted, "Isn't it just a broken radio?"

Old Xu looked at him speechlessly, and finally said, "Although the ore radio is simple, it is very difficult to do it well. The parameters of this radio have simply reached the limit of the ore radio.

It doesn't matter if others don't understand, but Lao Xu is very clear in his heart. Making an ore radio is basically an introductory course for students majoring in electronics. He also spent a lot of time studying this in those years, but the finished radio was far less than this one in terms of parameter performance.

Lao Xu didn't think that this was done by Lin Hong according to the tutorial, because he basically read all the books and magazines here, and none of them recorded the production method of such an ore machine.

When he was studying in the Soviet Union, he also participated in such a competition. At that time, experts from China and the Soviet Union made dozens of various ore machines. Lao Xutou's ore machine at that time won the third place, but compared with this one, whether in terms of appearance, component layout, and key parameters In terms of counting, it is too inferior.

Thinking of this, Lao Xu turned his head and asked Lin Hong, "How is the listening effect?"

"General." Lin Hong replied.

Old Xu couldn't help but be a little strange when he heard the words. It is reasonable that the performance of this ore machine will not be much worse.

"Where's your antenna? What kind of antenna is it?

Lin Changming quickly said, "It's hanging on the book in the yard. It's strangely shaped, like a fish bone."

Old Xu ignored him and looked at Lin Hong.

Lin Hong answered truthfully: "I have improved it on the basis of the Yagi antenna, but the listening effect is still not ideal, and I can only receive seven or eight radio stations."

Old Xu didn't care so much. He directly connected the radar antenna he designed to the ore machine, and then turned on the switch button of the radio.

Ten minutes later, Lao Xu was completely speechless.

"Do you still say that this effect is average?"

He received many radio stations, large and small, and even a radio station in cities in southern Soviet Union.

This is completely beyond the scope of ore radios. It is very good for ordinary ore radios to receive one or two strong stations, and more than ten radio stations have just been received. Although it has a lot to do with Lao Xu's antenna, this is not the fundamental reason.

Lin Hong actually said that the performance is only "aver average", and Lao Xu can only be attributed to the newborn calf not afraid of tigers.

Lin Hong doesn't know what kind of situation the ore machine is in the hands of others. He just is completely based on his own ideas. He thinks that he can't listen to which short-wave radio stations, so he feels that the effect is just ordinary. For a long time, he has been an old Xu's radio station to ask for himself as a standard.

This is a perfect ore radio!

Old Xu held a wooden box in his hand, but his eyes looked at Lin Hong, with a strange look in his eyes. He thought in his heart that Lin Hong's child was simply an uncut jade. He was only eight or nine years old, without anyone's guidance. He could make such a work just by self-study. After that...

"Hey hey, Lao Xu, my apprentice is good, right?" Seeing this, the old grandson was even more proud and immediately showed off. The apprentice was smart, and the master also benefited.

Old Xu couldn't help saying, "When did he become your apprentice?"

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