"Section Chief Chen, it's not 200, it's 360 yuan!" Zhou Jianhua replied in a deep voice:

"I originally expected to sell for 200 to 500 yuan each, after we went back, we carefully studied your circuit board, and found that you still have a lot of problems with this circuit board, and it is quite troublesome to solve, but considering that we are working together for the first time, you still don't know much about our technical capabilities, so this time even if it is a discount, I will only charge you 360 yuan per piece."

"360 yuan is still a discount?!" Section Chief Chen shook his head and complained.

"Of course! If you don't believe it, let's try it, I will also sell these circuit board plug-ins on credit to those manufacturers who want to return them, you see if I sell them for 500 yuan a will they want! ”

"Gotcha! You cow! I won't fight with you, just the price you said! See the results after 2 months. Section Chief Chen said helplessly:

"But I have a request, you can't disclose the fact that you sell this "circuit board plug-in" to us to those manufacturers who buy injection molding machines. ”

"That's fine!" Zhou Jianhua readily agreed.

After Mr. Chen drew up the agreement, he signed with Zhou Jianhua, and each person received it, and Zhou Jianhua asked Mr. Chen to write a receipt for receiving 10 "circuit board plug-ins", after doing it, Zhou Jianhua handed over the 10 "circuit board plug-ins" to Manager Chen, and took out a handwritten "circuit board plug-in" installation instructions to Manager Chen, emphasizing that the installation must be carried out in strict accordance with the requirements of the manual, and then left Nandu Machine Tool Factory, found a restaurant for lunch, and rushed to Yangyue Road. Continue to purchase electronic components.

Zhou Jianhua bought an injection molding machine last time because of a temporary change of plans. In a hurry, they were in a hurry to purchase radio components and some necessary test equipment for export. This time, I had to buy everything and take it home.

Zhou Jianhua went to the "Jiangdian Trade" store first as usual. See if there is a suitable integrated circuit model to meet the requirements of radio miniaturization and improve the quality of the radio, and then look for other supporting components after determining the integrated circuit.

Seeing Zhou Jianhua walk into the store department, Wang Xiaozhen looked at Zhou Jianhua and pursed his lips and smiled without speaking.

Zhou Jianhua walked to the counter, looked at Wang Xiaozhen's strange expression, and asked strangely:

"Laughing at what? What's so good about making you so happy today? ”

"Nothing." Wang Xiaozhen shook her head with a smile and asked:

"What are you going to buy today?"

"Well, find a few enlarged manifolds. There are also carbon film potentiometers, mid-circumferential transformers, magnetic rod antennas...... And much more! Zhou Jianhua replied with a smile:

"Hehe, I'm going to work hard for you a lot today."

Zhou Jianhua designed a "superheterodyne AM radio", considering that his radio is sold to third world countries, in these countries, this era should be the same as in China, FM radio has not yet been popularized, so there is no need for FM function, only need to be able to receive AM radio.

Because the sensitivity and selectivity of superheterodyne AM radio largely depend on the performance of the IF amplification stage, Zhou Jianhua's focus today is to find out whether there is an integrated block suitable for IF amplification. In addition, the performance of the "mid-cycle transformer" is also very important, and its coupling amplification performance also has a great impact on the subsequent detection effect of the radio.

At present, the magnetic rod antenna used in domestic radios is relatively large. This is because the current domestic radio is large in size and can be accommodated, and because of the backwardness of the smelting and sintering of rare metals such as samarium cobalt and neodymium iron boron in China at this time, the magnetic energy product of the domestic magnetic rod is not high enough, and because samarium and cobalt are extremely rare and expensive scarce strategic metals, samarium cobalt magnetic rods can only be used in military products despite their excellent magnetic properties. Therefore, Zhou Jianhua hopes to find imported rubidium iron boron magnetic rods with small size and excellent magnetic properties here.

The "carbon film potentiometer" that Zhou Jianhua wants to buy is used to adjust the volume of the radio. The "carbon film potentiometer" has poor moisture resistance and large dynamic noise, but it has a large resistance range, good resolution, small size and low cost. Many of the larger radios of this era used "wirewound potentiometers", which had a long lifespan but were expensive and bulky. Zhou Jianhua's radio was originally won by the color style and small size to win the subdivided low-level market, and the large-volume components were resolutely not used.

However, the domestic carbon film potentiometer because of the low level of production technology, the quality is not very good, the life is too low, Zhou Jianhua wants to see if he can purchase a better quality imported carbon film potentiometer, although the imported potentiometer may be much more expensive than the domestic one, but this is the key wearing parts in the radio, the service life and use of the radio has a great impact, this money should be spent or spent, the cost is slightly higher is not afraid, after all, this radio is used to exchange foreign exchange, not to make money.

After all, it is not easy for brothers and sisters in third world countries to earn money to buy a radio, we can't sell fake and shoddy products and ruin our reputation, right? Zhou Jianhua also hopes that his small size, lively appearance, and stable performance radio can exchange foreign exchange for himself for a long time!

"Haha...... Are you going to have a treat again today? Wang Xiaozhen asked with a smile.

"Uh...... It's not a problem, it's a problem, you seem to owe me a piece of crispy duck! Zhou Jianhua also said sarcastically.

"I owe it to me, I'll ask, but you have to treat me to a movie today!" Wang Xiaozhen glanced at Zhou Jianhua and said.

"Uh...... It's only a few cents to watch a movie......" Zhou Jianhua scratched his head and said:

"Don't you think it's a bit of a loss?"

"Hah! You think I really want to be greedy for you! Wang Xiaozhen pursed her lips and said:

"In the past few days, "Camel Xiangzi" has been screened in the cinema, I heard that it is very good, I have long wanted to watch it, and it is boring to go alone......"

"Doesn't anyone in your family watch movies?" Zhou Jianhua asked puzzledly.

"They...... I can't get together a piece...... "Wang Xiaozhen's big watery eyes glanced at Zhou Jianhua and said coquettishly:

"I'll catch you with me today, I know you won't go back to Sword City today!"

"Uh......" Zhou Jianhua broke out in a cold sweat, looked at Wang Xiaozhen tangled and asked:

"Sister Wang, who told you that I won't be returning to Sword City today?"

"Humph! I just know anyway! Wang Xiaozhen's chest straightened and her head tilted. Smiled slyly:

"Just say it! Are you going to invite me to a movie today?! ”

"It's not a big deal to invite you to watch a movie. But you have to tell me. How did you know I wasn't going back to Sword City today? Zhou Jianhua replied helplessly.

"Is this...... Tell you later! Wang Xiaozhen replied with a smile:

"It's okay, don't go back! Otherwise, I won't help you find anything in the future. ”

Zhou Jianhua stared at Wang Xiaozhen fiercely, pointed his finger at Wang Xiaozhen's head, and said hatefully: "Count you ruthless!" ”

"Hee-hee...... Wang Xiaozhen smiled proudly:

"Hurry up! Say! What to look for first? ”

Zhou Jianhua thought to himself, okay, hurry up and get down to business first, and talk about the rest later.

The various components in the "Jiangdian Trade" store department were displayed quite neatly, Zhou Jianhua browsed along the counter, and asked Wang Xiaozhen to take out their inventory list and take a look. In the end, an integrated block for intermediate frequency amplification, an integrated block for power amplification and a composite carbon film potentiometer were selected, but the mid-perimeter transformer and magnetic rod antenna could not be found.

Zhou Jianhua said in his heart, if you don't have it, you can find domestic transformers and magnetic rod antennas in the middle and Zhou periods, after all, such a store can't expect to have everything, not to mention that only about 3,000 US dollars in his 8,000 yuan foreign exchange quota can be used to purchase imported components needed for radios.

These three components add up to 7 yuan per set, and the current exchange rate will cost 3.5 US dollars, and the foreign exchange quota of 3,000 US dollars is not enough to produce 1,000 sets of prototypes by yourself. Although the parameters of these three general-purpose components are not very high. It's not too expensive, but it's enough to make your radio at the leading level in China in terms of performance.

Zhou Jianhua selected these components. The original designed radio circuit parameters also need to be adjusted accordingly, and Zhou Jianhua needs to purchase other components according to the parameters of the readjusted circuit components. So Wang Xiaozhen moved a chair out of the inner room and asked Zhou Jianhua to sit opposite him and recalculate his circuit parameters.

It took Zhou Jianhua more than an hour to revise his circuit diagram, and when he saw that it was almost there, he wrote a list for Wang Xiaozhen:

"Sister Wang, I had to buy through your company for the production of "police communication equipment" three kinds of components need a total of 5,325 US dollars, the Department of Foreign Trade has given me a quota of 8,000 US dollars, your company leaders should have been notified, the remaining 2,675 US dollars can also buy 750 sets of these three components I selected today, please help me now to your company Manager Wang a call, please your company as soon as possible to help me procure, in addition, your company's existing inventory of these three components, It's best to use them all for me first. ”

"Oh...... I can call for you, but you have to talk to our leaders yourself. Wang Xiaozhen nodded and said:

"I don't have as much face as you, and it's more convenient for you to say some things yourself."

"Alright! Alas! It's better to ask for others than for yourself! Zhou Jianhua complained deliberately.

"What?! Let you call our leader, I'm here for your good! Wang Xiaoling pouted and said with disgust:

"Really...... I don't know the ...... of good people."

"Huh...... Okay, okay, I was kidding you! Zhou Jianhua hurriedly coaxed:

"Am I wrong?"

Wang Xiaoling helped Zhou Jianhua dial the phone, Zhou Jianhua told his requirements to Manager Wang, Manager Wang said very enthusiastically on the phone, in the morning has received a telephone notice from the leaders of the Provincial Department of Foreign Trade, there is no problem with the purchase of components, will be arranged as soon as possible, as for Zhou Jianhua's new 2 power amplifier circuits of the 3 components, because they belong to general components, the social demand is also relatively large, so they can't all be given to Zhou Jianhua, but you can take half of it out first.

Zhou Jianhua thanked Manager Wang and hung up the phone, but when he saw that Wang Xiaoling was still pouting with a calm face and angry with herself, he happily teased: "My Miss Wang!" You can hang an oil bottle on your mouth! ”

Wang Xiaoling laughed out loud and replied shyly: "I'm not your eldest lady......"

"Oooh oh...... You're not mine...... Hahaha......" Zhou Jianhua said:

"I still have to hurry up and buy some things, I might be back a little late, you wait for me! Don't lock the door! ”

After Zhou Jianhua finished speaking, he put away the freshly revised drawings on the table, put on his bag, hurriedly came out of the "Jiangdian Trade" store department, and swept the various electrical components along the road one by one along Yang Yue Road, until it was time to get off work, he basically completed the other separated components in the radio, and also purchased some screws, bolts, nuts and other metal accessories that need to be used on the radio, and also bought oscilloscopes, signal generators, inductance meters and other production and testing equipment, and brought them to the "Jiangdian Trade" in the sales department.

"You've bought so many things again?!" Seeing that Zhou Jianhua returned to the store with a large bag and a small bag on his shoulder, Wang Xiaoling hurriedly came up to help Zhou Jianhua put things down, and blamed him distressedly:

"Can't you just go a little more? You have to get it together! What should I do if I'm tired?! ”

"Huh...... It's not too much, this thing can't help me, I have to hurry! Zhou Jianhua smiled and replied.

"Then why are you in a hurry, are you still afraid that I won't wait for you?!" Wang Xiaoling glanced at Zhou Jianhua with disgust and said.

"Alas! Then who knows you! Zhou Jianhua put down his things, shook his arms and twisted his body to stretch his muscles and bones, and said with a smile:

"If I delay your meal and starve you, I can't afford that responsibility!"

"It's so easy to get hungry...... Wang Xiaoling replied disapprovingly.

"That's hard to say, doesn't it say that women are small-bellied chicken intestines? Can't eat much, and if you're hungry? Zhou Jianhua continued to joke with his fist on his sore shoulder.

"It's really kind and not reciprocated!" Wang Xiaoling twisted her body and pretended to be angry and replied:

"People care about you, but you still turn around and hurt others, ignoring you!"

"Gotcha! I seem to have said the wrong thing again......" Zhou Jianhua said with a wry smile:

"Alas! I'm just like this, a little familiar, so I talked nonsense without any words, offended Miss Wang, how can I still mess around here in the future...... So be it! I've invited you to today's dinner and movie, so I can be regarded as making amends to you! ”

"I don't want you to invite me!" Wang Xiaoling objected:

"Okay, I owe you a meal, and I'll invite you today!"

"Forget it! You should keep your little salary as a dowry! Zhou Jianhua said with a smile:

"If you must invite me, just invite me to a wedding wine when you get married! Eat today as mine! Go ahead! What do you want to eat? (To be continued......)

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