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Tang Hua: "I will give time to the hard disk factory. T55 and T56 do not come with hard disks, but sell storage servers at the same time as selling computers. The storage servers are still equipped with these gasoline can hard disks."

……

Fast forward to 1955. In the second half of 1955, IBM will develop its own gasoline can hard disk - 350RAMAC, which will be sold in 1956.The diameter of the disk is 24 inches, the number of disks is 50 pieces, the weight is hundreds of kilograms, and the storage capacity is 5MB.

Tang Hua had read rumors before that IBM deliberately lowered the capacity of 350 RAMAC. In fact, IBM's technology could make the storage capacity close to 10M at that time, but in order to sell more hard drives, the capacity was deliberately reduced.

Judging from the research and manufacturing experience of the Magnetic Machine Factory in the past two or three years, it is indeed quite simple to increase the capacity of this gasoline can hard drive.Tang Hua's "Merlin" technology has only just been verified in the laboratory, and has not yet been used on the oil drum hard drive.As for the magnetic head with magnetoresistive effect, let's go to the back row.In this way, the hard disk of the small gasoline can is 10M, and the hard disk of the large gasoline can is 20M.

It seems that IBM is still black.

Merlin technology, or the Merlin drive, was originally invented by IBM.Recently, the hard disk factory has basically made a tracking-following servo system and a voice coil actuator. The latter is probably a component like a speaker diaphragm. This combination first reduces the response time of the hard disk, and because the operation is more reliable, the density of the track can also be improved.

The magnetoresistance and giant magnetoresistance effects allow the magnetic head to read the data columns arranged more closely on the hard disk without being disturbed by adjacent columns, but this technology should be used when the hard disk capacity exceeds [-] megabytes.

In the first magnetic branch factory, the biggest bright spot that Tang Hua saw was that the factory was gradually getting out of the industrial master machines and processing equipment that Tang Hua rushed back from abroad in 1949.

Of course, this is also normal, and five full years have passed.The hard disk is a special thing. The production equipment is not available in foreign countries. It is all picked out bit by bit by several factories in Suzhou, with the great assistance of Shanghai and Northeast.

In addition to the hard disk factory, most of the integrated circuit production lines were built by themselves, and a small amount of equipment was imported from the Soviet Union and East Germany.

At present, the picture tube production lines of the two TV factories in Shanghai and Guangzhou are still imported.

The Huawei TV factory in Guangzhou was smuggled back to China in 1949. The equipment of the Shanghai TV factory was slightly improved compared to the Guangzhou factory. It was the opening of the secret talks between China and the United States and the Korean prisoners of war in Hong Kong at that time. We seized this time window and rushed to bring them back. of.

Now that Huawei's program-controlled switchboard has been successfully developed, should they focus on TV production equipment in the next stage?

In 1953, Beijing TV Station started broadcasting. In early 1955, Shanghai TV Station also started broadcasting before the Spring Festival.

Although it is difficult for ordinary people to afford TV sets, it is normal for the factory to purchase one or two TV sets with collective funds and let workers watch programs for half an hour and one hour in the cafeteria after work.

If the first industrialized cities in China complete the "quasi popularization" of televisions in this way, then the domestic demand for televisions will not be small.

……

The Second Branch of the Magnetic Machine Factory and the Magnetic Tape Factory.

There are two main businesses, data storage/backup tapes for computer use, and audio tapes.

The third branch of the Magnetic Machinery Factory and the Magnetic Core Memory Factory.

Because the photolithography industry is not so advanced, the capacity of integrated circuits for ROM or RAM is still very small, so it is still necessary to continue to produce magnetic core memories.According to the current salary level of workers in state-owned enterprises, the labor cost of braided magnetic core memory is actually very low. I really don’t know how the price of US magnetic core memory was as high as 50 US dollars per word in the 0.25s, and the price of ultra-miniature magnetic core memory was 1 US dollar per word. of.

……

Hon Hai Electronics.

Hon Hai Electronics Factory has been confused in recent months.

After the mass production of the third-generation transistors, the output of the second-generation transistors was continuously reduced, and finally only maintained a workshop that produced 5 transistors a month to supply less important electronic products such as walkie-talkies and radios.After the third-generation transistor adopts the planar lithography process, the cost of a single third-generation transistor is even lower than that of the second-generation transistor, so there is no need to keep it.

However, starting from July 1954, the Bureau of Electronics and Information Industry requested to increase the production of second-generation transistors.In the end, Hon Hai was simply allowed to expand to two second-generation transistor workshops, with a monthly output of 7, while the monthly output of the third-generation transistors should be slightly reduced.

"Director Li Qiang's notice also said that we are not allowed to think about using the planar lithography process of the third-generation tubes to produce the second-generation transistors," said General Manager Shen of Hon Hai. "It makes our transistor factory so strange now."

"There are some special tensions between China and the United States," Tang Hua said, "and they are also business opportunities. We want to sell a batch of 'older' computers to the United States. These computers are relatively backward in our opinion, but in the United States There is still enough competition in the market.”

"Oh, hehehe," said Manager Shen, "then I understand. It must be that the Americans can barely make components similar to our second-generation transistors."

Tang Hua: "That's right. But the planar lithography process is still our technical secret, so the production workshop managed by the third generation is still in the military area... If the Americans are managed by the third generation, their intelligence agencies may disassemble it for analysis. I will get some kind of inspiration, just to be on the safe side, I will continue to use second-generation transistors to build computers for them to play with.”

Chapter 63, C55 with Wordstar pre-installed

From Shanghai to Kunshan, Suzhou, and Wuxi, several small and medium-sized cities, Tang Hua felt an obvious change in the car this time: the roads are all paved with asphalt.

Asphalt roads appeared in Shanghai as early as the 20s, but only in urban areas.Last year in Shanghai, Tang Hua found that the two roads out of the city were under construction, and there were piles of gravel on the roadside. At that time, he guessed that the roads would be repaired.

The road is now repaired.The jeep can maintain a speed of 60+ hours all the way, and there is no sense of bumps.

For the supply of T54 parts, factories in Shanghai now account for 20%, Suzhou 40%, Kunshan and Taicang each about 10%, Wuxi 10%, and other cities 10%. The final assembly plant of the T54 is in Shanghai.Several cities are within 100 kilometers from Shanghai, and computer parts are not heavy cargo. Cars can solve all logistics and transportation requirements without using railways.

But the road should be smoother...

"Is this the engineering unit of the Air Force?" On the outskirts of Shanghai, Tang Hua saw a large group of engineering soldiers in military uniforms working in an open space.

"It looks like a military uniform from the Air Force," said the secretary.

"This is definitely not an airport. Look at the place where the earth is being excavated, and it's not an air force warehouse."

……

Tang Hua has already guessed what the Air Force Engineering Corps is going to repair, the vehicle base of the Hongqi-3 (S-75 Sam-2) air defense missile system.

In 1951, the S25 anti-aircraft missile was finalized and entered service, and 4 sets were immediately manufactured for supply to North Korea. At that time, Tang Hua refrained from asking for the S25, but wanted to wait for the S75.

In the report to Nie Shuai and the Prime Minister, Tang Hua said the performance comparison between the S25 and the S75 air defense missile that the Soviet Union was planning to develop:

The S25 missile is a single-stage liquid propellant; the S75 missile is a two-stage system of solid booster + two-stage liquid rocket. The missile is smaller than the S25, but the range is basically the same, and the flight speed of the missile is much higher than that of the S25.

Because the missile is lighter, the S75 can be towed by a truck (of course it depends on the road), but the S25 can only be made fixed.In addition, the radar system, guidance system, etc., because the S75 appeared two or three years later, Tang Hua can also equip it with a better computer and command control system.

After deciding on this idea, the Military Commission decided to skip the S25 missile. In 1953, when the S75 missile entered the test launch stage, China and the Soviet Union signed an agreement on cooperative development and introduction; in the second half of 1954, the S75 missile began to test the sample bomb with radio command control, and we began to form an air defense missile battalion and build Missile camp.

The first batch of Hongqi-3/S75 missile battalions consisted of four battalions, two in Shanghai and two in Beijing.

There are two missile battalions in Shanghai, one in Pudong and one in the southwestern suburbs.

"In the future, air defense missile units will be stationed here. In the future, the air defense missiles manufactured by us and the Soviet Union will not only guard major cities, but may also be deployed along the entire coastal border," Tang Hua said. The air force is not very good at intercepting it at the moment."

……

On October 1954, 10, Shanghai and Nanjing were spied on by the "Canberra"/RB-1 of the US Air Force.

"Canberra" is a British twin-jet medium bomber, but this aircraft is much more famous than the Il-28.Because the performance of "Canberra" is really good, the U.S. Air Force also imported it from the United Kingdom and gave it a B-57 bomber number.

The B-57's specialty is flying high.The bomber version can fly level at 15000 meters. The RB-57 is slightly modified and used as a reconnaissance aircraft, which can fly 18000 meters. RB-57D is a big change, the wings are much longer, it looks a bit like U-2, and the ceiling reaches 21300 meters.

RB-57D的升限是气死米格-15、米格-17、米格-19的节奏，甚至米格-21都得利用特殊战法，加速跃升动能换势能，才能获得一个短时间的拦截RB-57D的窗口。

On October 1954, 10, an RB-1 took off from Okinawa swaggeringly at an altitude of 57 meters, passed by the southwestern suburbs of Shanghai, went straight to Nanjing, circled around Nanjing for half a circle, and turned back to Okinawa.

空军的雷达站在RB-57进入中国大陆时就发现了它，然而无论是米格-15、米格-15比斯还是红旗-2，对RB-57都无可奈何。

Liu Yelou summed up the matter and reported it to the Military Commission and the Ministry of National Defense. The chairman and Boss Peng did not make things difficult for Liu Yelou, but urged the Air Force to hurry up the establishment of the Hongqi-3 missile battalion.According to the current development progress, Hongqi-1955 may be finalized and put into production by the end of 3.Just hold on for another year.

唐华掐指一算，55年底红旗-3投产，约摸56年初形成战斗力，然而56年底U-2就交付使用了，这种升限24000米的怪异飞机和红旗-3/S75之间的较量不知道要持续多少年。

……