Deep Space Planet Leader

It took a while before the radio returned to normal and the music on the tape was broadcast.

"Sweet, you smile so sweetly, as if flowers are blooming in the spring breeze..."

An unknown singer has a nice voice.

“That’s the problem. It’s the same when the at first is started, and it’s getting better later. I don’t know why...”

Suddenly became nervous.

He used to find several merchants and wanted to repair this thing.

But these merchants dare not take the job at all, because once the repair is broken, they will lose money.

These ancient electronic products are very delicate, maybe a certain route inside will be broken after a few touches.

even more how, various parts of the radio have long been discontinued.

Even if it is produced in a factory, it cannot be sold at any price. Antiques require the word "ancient". If modern electronic components are installed on ancient instruments, what is the difference between putting on a dog skin plaster?

Anyway, it can still be played normally, so my uncle can only make use of it.

Zhang Yuan be eager to have a try and walked to the radio: "Let me fix it and see it!"

"That...oh."

"Try it."

It's obviously a distrustful tone.

The little uncle's heart was groaning, and he felt like he was overwhelmed.

Although my nephew is awesome, what kind of "spaceship management" professional, and even able to repair spaceship, but the difference between repairing spaceship and repairing radio is a million miles apart!

The most important thing is that if the repair is broken, it is impossible to make your nephew lose money!

Seeing that Zhang Yuan's hands had touched the radio, his heart was fiercely twitched!

But for the sake of face, he couldn't say much, he just looked back fiercely at his daughter fiercely.

Ye Qingqing did not show any weakness, and stared back at her father, smiling in her heart. In her opinion, this Ancient One has long been discontinued, and even the design blueprint has long been lost. Who else can repair it?

Especially...the difficulty of dealing with minor problems is far greater than that of major problems.

Take down my cousin, the "child of someone else's family", and I can breathe a sigh of relief, and it seems to prove that "reading is useless", and I can read a little less in the future...

At this time, Zhang Yuan has unscrewed the housing screws of the radio, exposing the electronic structure inside: switches, power supplies, variable capacitors, potentiometers, magnets, etc. The structures are not too complicated.

It is these uncomplicated things that have withstood the test of time and survived until now.

The more complex and exquisite things are, the easier it is to damage. The 21st century Warwick and Apple smartphones have very few remaining, and every one that remains can be sold at sky-high prices.

Zhang Yuan has never repaired this Ancient One. This is a brand new challenge.

If you put it in the past, he might avoid it, but now, there is a strange desire to be eager to have a try in his heart.

took a deep breath, and the brain starts to move at high speed.

He tried to use the knowledge he had learned in the past to speculate on how this radio works.

Any electronic instrument plays with electrons and magnetic fields, which are essentially the same. The working principle of the radio is nothing more than converting the audio signal through various circuit structures.

"This radio just used tape for broadcasting, so the antenna, variable capacitor, and detection circuit are basically not in handy. The noise emitted by at first is unlikely to be caused by errors in these parts. ……"

"Will it be the tape problem?"

Zhang Yuan took out the tape, reset it manually, and put it back in again.

"Sweet, you laughed so sweetly..."

This time, play from the beginning, and there is no noise in the middle.

Zhang Yuan changed another tape and pressed the play button.

"I can't end my love for you..."

There is still no noise.

"So, it shouldn’t be the tape."

The little uncle watched him trying again and again, getting more and more anxious, and quickly said: “Only when he started There will be noisy noises at the time, but there will be no more noise behind it. It really can’t do...Just forget it..."

He is always holding on to his heart, just hoping that his nephew can retreat.

Don't fix it.

Master, don't fix it!

"Is this only at first?" Zhang Yuan waited for a while, then took the radio under the air conditioner and blew it for ten minutes.

Plug in the power again, and sure enough, the cooled radio began to yell again.

"Buzz—weng!"

The harsh voice made my liver hurt.

It took a while before it stopped.

Zhang Yuan looking thoughtful.

The whole process of troubleshooting is a bit similar to debugging in computer programming. Now that the way the bug is generated has been determined, it is only necessary to find the cause and solve it.

Zhang Yuan paced back and forth in the room, thinking quickly about the suspicious points.

Poor contact?

No, bad contact will not yell at first, it will only stop working intermittently.

"It's not a phenomenon of current wheat."

After thinking about it, it may be a preheating problem.

This old radio uses vacuum tube technology.

There are two main devices in this close-to-vacuum airtight chamber: one is called a heating electrode, which is located in the center of the electron tube and emits light when it is working; the other is composed of a cathode, a metal grid, and a metal Board composition.

"If the vacuum tube is not properly warmed up in the circuit, it will cause the voltage of the entire circuit to be disordered. This part of the disordered voltage is mistakenly transmitted to the amplifier circuit behind, so when there is no electrical signal, The recorder yelled."

"In the end, when the radio frequency line heats up, the voltage of the vacuum tube has been adjusted, everything returns to normal, and the recorder works normally."

Zhang Yuan clapped his hands, it should be the reason!

The younger uncle saw Zhang Yuan pacing back and forth, just eating fruits, he felt that his mood was bad: where would a normal repairman walk around?

Ye Qingqing just pursed her lips and chuckled.

Zhang Yuan lowered his head and squinted his eyes. He began to disassemble the vacuum tubes one by one.

He really started to tear it down!

I...

My little uncle was crying without tears, and trembled all over: "Zhang Yuan, it’s really not possible. Let’s go to a professional antique repair shop! I know one Very difficult to deal with the Master...but the price is a bit higher."

Zhang Yuan fell on deaf ears, wholeheartedly devoted himself to his work. He really didn't hear what the little uncle was saying.

He changed the order of the vacuum tubes again, then screwed on the one after another screw, and waited for the radio to cool down.

The little uncle's face flushed, and she couldn't help but muttered in the heart: It won't be broken, will it? Does it appear a part?

Even my sister-in-law can't stand it anymore: "Look at you nervously. It's just a radio. What are you doing?"

"What do you know? Even if it's just a radio, you know Is it history? It's very..."

Zhang Yuan didn't answer, just pressed the play button.

ka-cha ——

The radio is like a docile sheep, warming up obediently, and there is no more noise.

"Sweet, your smile is very sweet..."

The soft singing voice echoed in the air.