Countercurrent 1982

Chapter 33 The first finished product

After the family of three had dinner at noon, Duan Yun rode his new car and continued to repair electrical appliances.

In order to establish his long-term customer base, Duan Yun wrote a stack of 'business cards' by himself, with his name, workshop and home address on it.

In this day and age, money can’t buy a telephone, it’s only available in factories. It’s hard to get a phone line for his own home. Duan Yun is helpless to do so.

With these business cards, it will be much easier for these customers to find themselves or introduce themselves to business in the future. After all, they are all owned by a factory. With this 'business card', it is very convenient to find Duan Yun.

Originally, Duan Yun planned to imitate the method of 'urban psoriasis' in his previous life, and posted small advertisements on the telephone poles at the entrance of the corridors in all communities, which would undoubtedly attract more business.

But after Duan Yun finally thought about it, he gave up the plan.

You must know that these days the state is very strict on speculation. Even if Duan Yun is repairing electrical appliances, once the business is too big and overkill, it will definitely attract the attention of some local departments, or it will become the target of economic crime. , which is entirely possible.

And Duan Yun's way of keeping business cards and relying on word-of-mouth publicity is completely a kind of mutual help among colleagues in the factory. After all, it is normal for workers to help each other for hard work in the past two years. When things are on the line, the risks are naturally much smaller.

In a whole afternoon, Duan Yun rode the newly bought car to nearly twenty households, and there was more than 100 yuan in his pocket.

Duan Yun earns the wages of ordinary workers for several months in a day, which makes him feel unreal.

It is said that money is hard to make these days, but now in Duan Yun’s view, it is obviously the working class who have this sigh. For many traders and people with special skills like him, the way to make money is still quite good. Wide.

After going home for dinner in the evening, there was no other entertainment, and Duan Yun came to the rental house by himself again.

The weather in August was hot and dry, and there were a lot of mosquitoes and flies in the rental house. Duan Yun simply pulled up all the weeds around the house, and then went back to the house and folded a small fan with waste paper to drive away the weeds. Mosquitoes and cool down.

Duan Yun sat on the stool and carefully revised the circuit diagram of the antenna amplifier with a very focused expression.

People in technology like to drill some horns, and Duan Yun is obviously no exception.

In fact, the TV antenna amplifier he designed is already very advanced this year, but Duan Yun still wants to make a more avant-garde design.

Duan Yun clearly remembered that when he was a child in his previous life, there was a TV antenna called '001' that was very popular. The advertisements about this antenna were very fierce, and even its functions were advertised in a magical way.

But in any case, the performance of the 001 antenna was indeed commendable at that time, and the sales volume was also very popular, especially when TV sets had begun to be popularized in a large area across the country, and even color TV sets were no longer rare. The usage of the 001 antenna was quite large.

In addition, the advantage of this antenna is that it is small in size and can be used on top of the TV. Compared with the outdoor antennas that are placed on the roof and yard, it is difficult to adjust the signal and cannot be used in wind and rain. It is obviously a lot more convenient. And the viewing signal is still good.

However, the 001 antenna is an active antenna, and the signal receiving and processing components are far more complicated than the signal amplifier of the current Yagi antenna. Some electronic components, Duanyun, may not be available in Daxing, so he is only a preliminary At the design stage, we still have to find a way to promote the improved Yagi antenna designed before.

Duan Yun even plans to set up his own factory to produce this new indoor antenna in the future, but now Duan Yun can only think about it.

Thinking of starting a private enterprise in the city these days is no different from a fantasy. If it is in the countryside, it is possible to rely on the village branch team to set up a village-run collective enterprise, but the approval is still very difficult, and the funds, land and talents are huge challenges.

Although Duan Yun has skills, the amount of money he makes now is far from setting up a factory. In addition, he has no personal connections with the government, so he can only temporarily engage in his electrical repair business during this time.

Duan Yun revised the drawings repeatedly. He tried his best to make the circuit diagram of the antenna amplifier smaller on the premise of improving performance. The amplifier circuit board produced by doing so would save costs and be compact and flexible.

I kept painting until very late, and when I felt the eyelids were fighting, Duan Yun left the rental room and went home to sleep.

……

Early the next morning, Duan Yun rode his bicycle into the city.

Although it was Monday, because the workshop did not give him a shift, Duan Yun could still do his own thing during the day.

In fact, Hongxing Gear Factory is located on the edge of the city, not too far from the center of Daxing. It takes more than an hour to walk, but with a bicycle, it takes less than 10 minutes.

When I arrived at the place agreed with Li Caitou yesterday, I paid with one hand and delivered it with the other hand. When I left, Li Caitou also stuffed him with the remaining half of the big front door. Obviously, he regarded him as an important customer. .

After wandering around the mall, Duan Yun bought some other things for repairing electrical appliances, and then rode back to the factory.

Pushing the car into the small room, Duan Yun put the copper clad laminate and other things he bought, and then prepares to make the part of the antenna amplifier.

Although the circuit board seems very complicated to the layman, it seems that only the factory can produce it, but in fact, as long as the tools are available, it is completely DIY.

First draw the lines to be made on white paper, then use carbon paper to print on the copper-clad surface, use a small row of pens to apply paint on the lines and solder joints to be retained, put them in a plastic tray after drying, and use warm water Dissolve the ferric chloride and pour it into the immersion circuit board and shake it gently until the exposed copper clad surface is corroded.

Then rinse it with water, soak it and let it dry, wash off the paint with rubber water, drill holes at the welding holes with a small electric drill, polish the lines with very fine sandpaper, and finally brush the lines with rosin alcohol mixture. it is done.

Looking at the first circuit board he made after his rebirth, Duan Yun was still very excited.

Afterwards, Duan Yun added a layer of 'anti-piracy' device to the circuit board, and then used scissors to make a simple shell of the tin plate he bought, and soldered it with the circuit of the antenna. You're done!

Taking a closer look at the finished product, Duan Yun felt a great sense of accomplishment in his heart. After all, this is a work he has spent a lot of effort on independently.

I glanced at the watch on my wrist, it was just before lunch time, and there were few TV programs at this time.

Duan Yun plans to go home to eat and sleep first, and then at six or seven o'clock in the evening, he will go to the house of the middle-aged woman in the three living quarters last time to test the new Yagi antenna he just made...

(End of this chapter)