Siheyuan starts from the stationmaster

Chapter 154: Chapter 154
Xiang Haige led two students to test and calibrate all the electronic components with a multimeter. While they were testing and calibrating the electronic components, Bai Zirui sawed out a plywood of appropriate size for them to make a radio circuit board.

After the three of Xiang Haige calibrated and tested the electronic components, they picked up the plywood prepared by Bai Zirui to make the circuit board.As expected of a professor in the Department of Wireless Electronics, Xiang Haige made the required circuit board substrate in just a few minutes.

It looks horizontal and vertical, and it is impossible to tell that it is processed by hand. If it is used in later generations, it will be difficult to achieve such a standard even with electric machinery. It can be seen that the professors and scholars of this era are rigorous in their studies and have strong hands-on skills.

After the circuit substrate of the radio is completed, the antenna is made. The function of the antenna of the radio is to receive electromagnetic waves in the air.In order to better receive the radio signal, the unreceived signal can be received, and the received signal is clearer! Therefore, Professor Xiang Haige specially brought an oscilloscope to test the signal.

Xiang Haige saw on the oscilloscope display that the signal of the antenna was stable. After he connected the antenna to the circuit board, he started to make other parts of the circuit. After about ten minutes, the circuit board of the radio was completed.

The entire circuit board looks neat, and the spacing between the holes is almost the same. Xiang Haige also painted insulating paint on the exposed wires.It can be said that this circuit board is not bad in performance except that it is not as lightweight as a printed circuit board.

Although the electronic components on the circuit board are generally made, they also show a kind of electronic beauty. The entire circuit board looks like a work of art.

After Xiang Haige completed the circuit board, he began to test the circuit board. After connecting the power supply and the speaker, he turned on the switch on the circuit board, and a rattling noise came from the speaker.

"Very well, there is no problem with the circuit." Xiang Haige nodded in satisfaction.

He adjusted the potentiometer on the circuit board to search for the station, and soon the harsh noise in the speaker disappeared, and he heard the AM broadcast.

Bai Zirui listened carefully to the sound effect of the circuit board of this radio. Although the speaker is inferior, it also showed good sound quality after being tuned by Xiang Haige.

Xiang Haige tested the three frequency bands of the AM radio respectively, and the results were very satisfactory. Next, he should test the reception of the FM radio. He set the band gear to the FM position, and began to adjust the potentiometer. was received.

It can be clearly heard that the sound quality of FM radio is better than that of AM radio. Xiang Haige continued to adjust the potentiometer, searched for other FM bands, and recorded all the radio bands that could be found. Guests, it can be regarded as a value-added service!

After Xiang Haige tested the circuit and FM radio, he led two students to make all the parts on the radio casing out of wood.

Looking at the extremely exquisite wooden case, which is more art than industrial, Bai Zirui was deeply shocked, the power of this system, because this radio case was made by Xiang Haige and two students with woodworking knives, It looks like it was machined on a lathe.

After Xiang Haige finished the radio casing, he carefully painted it. Xiang Haige and two students made the circuit boards and casings of three radios after finishing the paint. After that, Bai Zirui told him to wait for the paint to dry the next day. The circuit board fits into the radio case.

On the second day, just after Bai Zirui had breakfast, Xiang Haige came with two students. When he saw that the paint had dried, he installed the circuit board into the casing, plugged in the power, turned it on, and adjusted the channel. .

"Sweet you smile sweetly
It seems that the flowers are blooming in the spring breeze
Open in the spring breeze
Where have seen you

Your smile is so familiar
Your sweet smile
I seem to have seen you somewhere

......"

Teresa Teng's soft, tactful, lingering, graceful, and slightly desolate sounds of nature came out from the left and right stereo speakers.Bai Zirui and Xiang Haige closed their eyes, shaking their heads, intoxicated by the singing of Mimizhiyin.

After listening to the song, Bai Zirui and Xiang Haige woke up from the beautiful singing, and he asked: "Student Bai Zirui, how much are you going to sell for the stereo FM radio we assembled?
Bai Zirui said with a smile: "Professor Xiang, the radio is one of the four most important things in marriage today. Every newlywed couple has to buy something. To buy a radio, money is not enough, you also need an industrial voucher.

Now the radios on our market are mainly domestic products. Except for big brands such as Peony and Panda, the prices of other small brands are not too expensive, about 80 yuan.

Imported brands of radios are more than 100 yuan cheaper in Japan, and nearly 200 yuan more expensive in Europe and the United States.The radio we made surpasses those imported radios in terms of appearance and sound quality.Another advantage is that our radio does not require a ticket. I am going to sell it for [-] yuan. "

Xiang Haige was a little dumbfounded when he heard the price set by Bai Zirui, thinking in his heart that this is worth two months of my salary, he hesitated and said: "Student Bai Zirui, is this price fixed? It’s too high, can you sell it?”

Bai Zirui laughed loudly: "Professor Xiang, don't worry! The market demand for radios is huge! From now on, I will ask you and the students from the Department of Wireless Electronics to help me."

Xiang Haige is a good scholar, but he doesn't know much about the market situation, so he bid farewell to Bai Zirui in doubt.

When Cai Lijian and the others came back at night, Bai Zirui turned on the radio and let them listen to it. Although they were not professionals, the high-end and atmospheric design was so exquisite that it looked like a work of art, especially the sense of space and layered effects of the sound. I was extremely shocked.

Bai Zirui looked at them with expressions of enjoyment.There was a gratified smile on his face. After listening to a song, after he turned off the radio, everyone's faces were full of unfinished expressions.

Bai Zirui smiled and said, "Lijian, what do you think of this kind of radio?"

Cai Lijian said sincerely: "Brother Zirui, this is the real radio. Its sound has a sense of direction and distribution, making it sound like heaven. The sound of the radio I listened to before was simply noise."

Bai Zirui asked: "Lijian, then do you think this radio is expensive if we don't want industrial coils to sell for 200 yuan?"

Cai Lijian blurted out: "It's not expensive. Such a good-sounding radio sounds like a kind of enjoyment. If I have money, I'll buy one right away."

Bai Zirui smiled and said, "Don't worry! As long as you follow me and work hard, I will reward each of you with a radio like this during the Chinese New Year."

Cai Lijian said without hesitation: "Brother Zi Rui, is what you said true?"

Bai Zirui said firmly, "Of course it's true. A gentleman's words are hard to follow."

After hearing his words, everyone's spirits were lifted, and they all declared that they must work hard with him. From then on, Bai Zirui began to earn money and accumulate capital while going to school.

(End of this chapter)