The young man was anxious, because he had been grinding the other party for two weeks, and what he was about to get his hands on was about to miss him.

"Uncle Gui, I want that thing, and I don't need you to discount it, it's okay."

The salesman uncle was stunned for a moment when he heard this, but before he could speak, Li Tong interjected coldly: "If you want to buy it, pay it now, and if you don't have money, just go to the side." ”

"Yes, you've been watching it for two weeks, so if you want me to say forget it, in fact, the movable geophone is quite easy to use." The salesman uncle was reminded by Li Tong and immediately glared at him, and it was clear which of the two had money and who didn't.

"How do you talk little brat, do you know who I am?" The young man clenched his fists and glared at Li Tong angrily and threatened.

"Third brother, why don't we go."

Jiang Tianliang pulled Li Tong's overcoat with some cringe, saying that he didn't want to fight with the other party, but Li Tong's anger had already been pushed up, how could he let the other party provoke again and again.

"I'm not interested in who you are, and I don't want to know. And who are you yelling at here? Do you want me to call the policeman uncle over, and you can tell him who you are! ”

"Okay, okay, you two wait for me!" The young man was speechless by Li Tongyi, and turned his head away after such a sentence.

If you don't leave, you can't do it, just like Li Tong said, the money in his pocket is not enough to pay at all, and if he stays, he can only continue to lose face, it's really hard for a penny to be a hero.

"Look at this thing, don't care about him, let's look at ours, this thing is called high-frequency germanium point contact diode, you don't see it small, but the effect of receiving electromagnetic signals is much more than these two ore geophones." The salesman took out a small carton from under the counter and showed Li Tong the diode inside.

Li Tong had never seen a diode before, but he had heard the purpose of this thing, and knew that what the salesman uncle said was right.

"How do you sell this?"

"1 piece of 5."

"How much? 1 piece of 5! Jiang Tianliang screamed in shock.

"Don't worry, the thing is a good thing, but the price is a little more expensive, can it be cheaper?" Li Tong didn't think it was expensive, after all, a radio cost more than 100 yuan, and the parts were not cheap.

"The price is a certain amount of shopping malls, I can't help it, but I have a second-hand high-impedance headset that can be sold to you cheaply, the new one costs 4 yuan 5, although I am broken, but there is definitely no problem with it, you give 2 yuan."

The salesman looked left and right to see that no one was paying attention to him, so he bent down and took out another cardboard box from the cabinet, lifted the lid, and placed a pair of headphones that he didn't know from an old walkie-talkie.

"This thing can be regarded as an antique, isn't it a loss to sell me for 2 yuan?" Li Tong smiled very innocently.

"Okay, I'll admit that this thing looks average, if you really want to buy it, you can pay 3 yuan for the two together." The salesman uncle could see that Li Tong was a knowledgeable child, and he stopped going around the bend and directly erased the false price.

"Cheng, then you can get me some copper wire, and another knob switch and variable capacitor for me." Li Tong didn't bargain anymore, and he rarely bargained with others when he wanted to buy things before.

An air variable capacitor is composed of two sets of electrodes made of copper, and the insulating medium in the middle is air. One of the pole pieces is mounted on a rotating shaft and can be rotated, which is called a moving piece. The other group is fixed and fixed, called fixed films.

When the moving piece is screwed into the gap of the fixed piece, the capacitance of the capacitor will reach the maximum, and the resonant frequency can be adjusted by rotating the variable capacitor, and the frequency modulation coil can be matched to achieve the purpose of selecting the platform.

"Aren't you good at assembling ore radios? I've got everything you need here, so you don't have to make a second trip and you'll be able to tune in tonight. "The salesman uncle was in a good mood when he saw that the walkie-talkie headset that had been in his hand for half a year was finally disposed of.

There was no need for Li Tong to speak again, he took the initiative to rummage through the rest of the spare parts needed to assemble the ore radio and put them on the counter.

"Together, you'll have enough money to build an ore radio, and you'll have just enough money left after the diodes and headphones." After the salesman uncle finished speaking, he reached out and went to collect the money.

"I have to give some discount on all these things, it seems that there is still a wooden box for these parts." Li Tong put his hand on the handkerchief.

"You still have to pay 1 cent and 8 for the wooden box, you can go home and ask the adults to get some wooden boards to make it yourself, and there is no need to spend this money." Uncle salesman persuaded Li Tong with a look of me thinking about you.

"If you have ready-made ones, you don't have to trouble your parents anymore, uncle, don't you want to send us?" Li Tong retracted his handkerchief back, as if he would take the money from the counter as soon as he heard the wrong answer.

"This, you have to pay at least another 1 cent for this, you can't let me fill this hole for you, right?" The salesman said very sincerely after hesitating for a moment.

Li Tong looked at the other party for a full 10 seconds, and saw that he had no sign of letting go, so he nodded with a smile.

Li Tong and Jiang Tianliang were holding a large bag of parts, and as soon as they walked out of the department store, Jiang Tianliang found a familiar figure squatting on the corner of the street not far away.

"Third brother, look there, that person just now was squatting at the intersection without leaving, probably guarding us." Jiang Tianliang touched Li Tong with his shoulder, and then motioned to Li Tong to look at the opposite corner with his eyes.

"Take care of him, let's take a taxi home, and let this grandson guard here."

After Li Tong finished speaking, he pushed Jiang Tianliang back to the door of the department store, and the young man who had found the two of them standing up squatted back again, his eyes full of hatred.

The two sides did not stalemate for too long, a tricycle with a bell appeared at the corner of the street, Jiang Tianliang estimated that it was the first time to take this kind of paid rickshaw, and shouted at the tricycle driver excitedly.

"Rickshaw! Rickshaw! This way, this way. ”

"Two dolls, are you going to take a car?" The coachman stopped the car and asked Jiang Tianliang happily.

"Uncle, how much does it cost for us to take a car to Nanluoguxiang at Jiaodaokou?"

"You two plus these things for 1 dime."

"No problem, uncle, look over there, yes, it's that little young man."

"What's wrong with him?"

"He wants to steal our things, so don't pay attention to him when he says anything."

"That's fine, get in the car."

Li Tong and Jiang Tianliang moved their things to the car, and the young man on the corner of the street was really anxious when he saw this, and trotted and wanted to come over to stop Li Tong and them.

Seeing this, the coachman immediately got out of the car, pulled out a short stick from the railing of the car with his backhand, and looked at the other party with fierce eyes and scolded

"Young man, what do you want to do?"