At half past six in the evening, Duan Yun rode to the third living area with the antenna he had made.

After knocking on the door twice, after Duan Yun explained his intentions, the door was quickly opened.

To Duan Yun's surprise, it was a handsome girl with fair skin who opened the door this time.

"You...... It's Xiao Fang's brother, right?" the girl asked after looking Duan Yun up and down.

"Hmm. Duan Yun nodded.

"Come in. The girl smiled and motioned for Duan Yun to enter the door, and then introduced herself: "I am Li Yun, Xiaofang's classmate, how do you call you?"

"My name is Duan Yun, you can add me a little duan. Duan Yun said with a smile.

"You are Xiaofang's brother, older than me, so I'll call you Brother Duan. Li Yun smiled, and then shouted to the kitchen: "Mom, it's a guest, don't be busy yet!"

"Xiao Duan is here. Li Yun's mother walked out of the kitchen, wiped her wet hands on her apron a few times, and beckoned: "Xiaoduan, you sit at home first, I'll cut some apples for you......"

"Auntie, don't be busy, I just want to see how well this antenna is installed in your house. Duan Yun said, taking the antenna and walking into the inner room.

At this time, there was a folding dining table in front of the window of the room, which was full of books, and it was obviously that Li Yun was writing her homework just now.

"Wait, it's a bit of a mess, I'll clean it up right away. Seeing this, Li Yun said with some embarrassment.

"It's okay, there's no hurry. Duan Yun smiled when he heard this, and subconsciously glanced at the books that Li Yun put on the table, they were all some high school tutoring textbooks, the handwriting on the book looked quite beautiful, and the writing was also very neat, and he felt more serious than his sister Duan Yun.

But soon, Duan Yun shifted his gaze to the 12-inch black-and-white TV set on the suitcase.

In the past two years, there has been no flat screen display on TV,Basically, they are all convex screens,There are two control knobs next to the screen,The knob on the top is for adjusting the table,The small knob below is used to adjust the screen tone。

On top of that, there's a tapered knob at the bottom that adjusts the volume, which looks a bit weird.

As for the TV antenna, it is a tie rod antenna that can be retracted and hidden behind the TV.

After thinking about it for a while, Duan Yun took out the taper and vice from the tool kit he was carrying, and prepared to connect the antenna.

Duan Yun reserved a nearly six-meter-long feeder this time.

The feeder is the signal line that connects the early TV set with the outdoor antenna.

The TV antenna feeder of later generations is a coaxial cable, and the feeder of this year is flat and generally double-wired, the wire body is insulated plastic, there is no shielding layer outside, the anti-interference ability is extremely poor, and its performance will be affected by rainy weather when used outdoors.

But this is already the best antenna material that Duan Yun can find right now.

"Xiao Duan, you have to be careful......" Li Yun's mother on the side saw Duan Yun dismantling the antenna behind the TV, and said worriedly.

"Mom, Brother Duan's skills are very high, he has helped many of our classmates modify the radio, the signal is good, and repairing our TV is a piece of cake. Li Yun Bingxue was smart, and immediately heard that her mother was afraid that Duan Yun would break the TV, so she helped Duan Yun beside her.

"Auntie, don't worry, it's just a change of antenna, if the TV is broken, I'll accompany you to a new one!" Duan Yun turned his head and said with a smile.

"I'm just afraid that you will be electrocuted...... Li Yun's mother was relieved when she heard this.

After Duan Yun connected the two ends of the feeder to the antenna end behind the TV with a cone and pliers, he wrapped the feeder around the back of the suitcase, and then walked to the window with the Yagi antenna.

Generally speaking, it is better to place this kind of antenna directly in the open space on the roof of the building, but due to the current conditions, Duan Yun can only temporarily install it in the window to test it first.

"Turn on the TV and take a look. Duan Yun stood at the window, and Niu Tou said to Li Yun who was standing behind him.

"Hmm. Li Yun answered, walked to the TV, turned on the power, glanced at Duan Yun, and then twisted the TV switch.

"Click!" After a soft sound, the screen instantly lit up.

"How is it?" Li Yun's mother heard the sound of turning on the TV and immediately walked quickly from the kitchen.

"Rustling ......"

A snowflake on the TV screen.

Li Yun twisted a few more times, and all of them were snowflakes without exception.

Seeing this scene, Li Yun's mother showed a look of disappointment on her face, and after seeing that there was no signal after changing several stations in a row, she walked away with a calm face.

"I'll tune it up again. Duan Yun also frowned when he saw this, and then retracted the antenna that was poking out the window.

"Click. At this time, the sound of the key opening the door sounded outside the house.

The door opened, and a middle-aged man in a tunic and a pair of black-rimmed glasses walked in.

"Dad!" Li Yun saw the man's face happy, and turned his head to greet him.

"Ah...... This is ......" After the middle-aged man saw Duan Yun standing at the window, he immediately asked suspiciously.

"Dad, his name is Duan Yun, and he is the brother of my classmate Duan Fang. Li Yun pointed to the vertical radio next to the bed and said, "He repaired our radio before. ”

"Uh......" The middle-aged man's face eased when he heard this.

"This is my dad Li Guosheng, he is the director of the supply and marketing department of the factory, and he often travels, if you have anything to do in the future, just talk to my dad. Li Yun said to Duan Yun with a smile.

"Hello uncle. Hearing this, Duan Yun hurriedly greeted politely.

"You are also from our factory?" Li Guosheng saw it for the first time, so he asked casually.

"I am a lathe worker in a workshop, and I have only been in the factory for less than a month. Duan Yun replied.

"Well, I said, how can you look so raw. Li Guosheng smiled, pointed to the antenna held by Duan Yun, and asked, "What are you ......?"

"The last time I repaired the radio, I promised to install an antenna for free in your house, and I just made it today. Duan Yun said with a smile.

"Eh, TV antenna?" Li Guosheng suddenly became interested when he heard this, and then glanced at the antenna in Duan Yun's hand again, and said: "I seem to have seen this antenna of yours when I went on a business trip to Guangdong, and the people over there seem to be called fishbone antennas, right?"

"Uncle Li, you are really well-informed. Duan Yun was also slightly taken aback when he heard this, he didn't expect this Li Guosheng to actually call out the name of this antenna.

"My dad travels a lot and has been to a lot of places. Li Yun is obviously also a little proud of her father.

"I heard that this thing looks simple, in fact, it is not very easy to do, it requires some electronic technology, in the south, there are generally special hardware stores and small workshops to make masters, I haven't heard that we have someone here who can make this kind of thing......" Li Guosheng looked at Duan Yun's eyes a little skeptical, he obviously didn't believe that Duan Yun could have this kind of ability.

After all, he graduated from secondary school and went to this gear factory, he knows what the level of education of ordinary workers in the factory is, don't say that it is a lathe worker like him, even if it is some old electricians in the factory, the level of radio is also very average, at most he can understand some simple circuit diagrams, and he can't make things like TV antennas.