Early in the morning of the second day, Duan Yun came to the electronics factory first.

"Good morning, Master Zhao!" praised Zhao Xuewu and brought a few new technicians to test the equipment in the workshop, and Duan Yun immediately greeted him with a smile on his face.

"Manager Duan is early!"

Seeing this, these people also greeted Duan Yun one after another.

"How's this rotor camera modified?" Duan Yun asked, pointing to the winding machine in front of him.

"I have redesigned a new circuit board, and after yesterday's trial, the four shuttle heads can be started at the same time, but the speed stability still feels a little inadequate, and a frequency ......tuner needs to be installed," Zhao Xuewu pointed to the newly replaced circuit board behind the machine and said to Duan Yun.

Zhao Xuewu's attainments in electronics are still very high, and he has now figured out the principle of this camera, and has also made a new circuit board, but the new equipment requires repeated commissioning and experiments, and it takes a certain amount of time and process.

"Good. Duan Yun nodded with satisfaction, and then asked, "How is the development of our new tape recorder?"

"According to the single-motor drive idea proposed by Manager Duan, we have designed a new product plan in the past few days, but the production difficulty is very high, on the one hand, a new type of motor is needed, on the other hand, the circuit board design is more complex, if it is produced in batches, it is very time-consuming and labor-intensive, and it is difficult to control quality ......problems," Zhao Xuewu said with a frown.

"Is quality control difficult?" Duan Yun asked.

"If we want to produce a small tape recorder, we must strictly control the area of the circuit board, but because of the use of a single motor drive need to design a new electronic servo control mechanism, which means that more electronic components need to be added to the circuit board, if there is no integrated chip, the electronic component layout on the electronic version of the small tape recorder will become very dense and compact, if it is assembled by hand, the process requirements are very high, but there are more electronic components that need to be soldered, which greatly reduces the assembly efficiency, and it is also easy to make mistakes, and the inspection is also very complicated......," Zhao Xuewu said.

With the ability of Zhao Xuewu and others, it is not difficult to design a single-motor servo circuit board, the difficulty lies in how to produce a high-performance motor, and another point is how to simplify the circuit design and improve production efficiency.

Therefore, some time ago, Zhao Xuewu and others held a meeting every day to study the design plan, and the design drawings have been simplified to the greatest extent, but it still cannot reach the ideal level, unless there is a chip with a high degree of integration, otherwise, it is impossible to do any simplified design of the circuit board of a single-motor dual-card tape recorder.

As for the high-performance tape recorder motor, it is also a problem that several old professors of the institute have recently focused on solving, and they have successfully made new circuit boards through their efforts in the past few days, replacing the original "castrated" Japanese second-hand production line circuit boards, but also because they cannot obtain high-performance chips, they cannot maximize the performance of the equipment.

It can be said that at this point, the objective conditions restricting the successful development of Duan Yun's new tape recorder production line are the backwardness of the domestic electronics industry's technology, the low yield of domestically produced chips, poor quality, expensive prices, and a huge gap between performance and foreign countries, which are simply useless, so unless Duan Yun can obtain foreign high-end chips, otherwise, the production line he introduced cannot play the greatest effect.

"Master Zhao, you can tell me what high-end parts and chips you need, it's best to make a list in the next two days, and I'll help you solve it." Duan Yun thought for a moment and said.

"Can you buy an integrated chip?" Zhao Xuewu was stunned for a moment when he heard this.

In the 80s, although China and developed countries in Europe and the United States were in the honeymoon period, in order to maintain their technological advantages, it was impossible for developed countries to sell some advanced technology chips to China, even if they wanted to buy some low-end chips, it was very difficult, which Zhao Xuewu still had a better understanding, because when he was teaching at Taiyuan Institute of Mechanical Engineering, he wanted to get a chip to do experiments and had to write an application report, even so, most of his reports were like a stone sinking into the sea, which shows how difficult it is to get an imported foreign high-performance chip.

"It's hard to buy advanced chips in bulk, but if it's only for a small amount of our equipment's circuit boards, maybe I can think of a way. Duan Yun spread his hands and said.

In fact, there is only one way for Duan Yun to get this kind of high-end chip, and that is his office in Xiamen.

Duan Yun's current Xiamen office and Xiamen Yuanfang Company have established a relatively stable business relationship, before the high-end subwoofer speakers produced by their factory, part of the integrated chip is obtained through Xiamen Yuanfang Company, and the other part is obtained through Gao Lei's channel, although Gao Lei may have gone to Hong Kong, but this channel has not been broken, Gao Lei's company set up in Guangzhou is currently continued to operate by his subordinates.

Previously, Duan Yun obtained two high-precision digital machining centers through Xiamen Yuanfang Company, which were obviously strictly prohibited from being sold to Chinese mainland by developed countries, but Yuanfang Company finally successfully shipped the two digital processing centers back to China through ant moving.

Since even such high-end machine tools can be smuggled over, small chips should not be a problem, and in addition to Xiamen Yuanfang Company, Zhao Changfeng has now found more gray channels in Xiamen, as long as the price is high enough, there will always be many people who are willing to take risks to "bring goods".

"If I can really buy advanced integrated chips, I can guarantee that this production line will be modified in advance!" Zhao Xuewu said confidently.

"Okay, you have a meeting with you tonight, make a list of the chips and parts you need, and hand them over to me early tomorrow morning. Duan Yun thought for a moment, and then said, "By the way, where is Master Peng?"

"Professor Peng is in the machinery factory now, what are you looking for him?" Zhao Xuewu asked.

Peng Changming is 5 retired faculty members, the only professor of the Department of Mechanics, Duan Yun returned to Shenzhen this time, put the main time and mind on the electronics factory, rarely go to the machinery factory to check, so when Duan Yun asked Peng Changming, Zhao Xuewu felt a little surprised.

"I still have a plan...... Duan Yun pondered for a moment, and then said to Zhao Xuewu: "Master Zhao, how much do you know about plug-in machines?

"Plug-in machine?" Zhao Xuewu was stunned for a moment when he heard this, and asked repeatedly: "Do you want to develop a plug-in machine?"