I am a cripple in the Siheyuan. Who am I afraid of?

Chapter 57 You are sending and receiving information
Song Wu briefly explained the situation, and also emphasized that the steel rolling mill wanted to close Director Li's shop after he arrived.

After Director Zheng heard this, he laughed a few times: "You are lucky to know Minister Zhou." At this point, he pointed Song Wu with his finger, "If anything happens in the future, remember to come to me first. .You kid can’t do that person’s thing.”

Song Wu stayed for a meal at Director Zheng's house and said goodbye when it got dark.

Song Wu was still interested in contacting Minister Zhou, but for a big leader like him, it was good luck to meet him through an occasional incognito private visit. The chance of contacting him again was probably very small. He was now I wanted to find out where they lived, but I couldn't find any way.

Besides, what reason should he use to find someone?

Just concentrate on your own affairs.

Since he was determined to learn about electronic components, he had to act quickly.So, I spent a morning and ran to Xinhua Bookstore to see if there were any related books for sale.

In the Xinhua Bookstore, a book on the shelf called "From Ore Machine to Two-Tube Machine" attracted his attention.

Mainly because the name of the ore machine awakened some memories in him. It seemed that many electronics enthusiasts regarded assembling the ore machine as their entry-level step. Although he had not learned about it, he had heard about it.

In my impression, although this kind of machine accepts relatively few stations and the signal is sometimes unstable, it also has the advantages of being simple to assemble, cheap and does not require a power supply.

Next to this book, he saw another book called "How to Assemble an Ore Machine" and asked the salesperson to bring it over.

Two books cost 3 cents each and 2 cents each.He flipped through it, and it was just right for a newbie like him, so he bought both books.

The book "How to Assemble the Ore Machine" is relatively thin, just like an instruction manual, without much introduction to the principles.The other book "From Ore Machine to Two-Tube Machine" is relatively more in-depth and introduces some principles, which can be used as a reference for him to learn from each other.

Song Wu calculated that he could use the ore machine to get in first and get a feel for it before going to night school.

He went home and did some research and found that it was really not difficult to make an ore machine.

There are only 4 main components and the circuit diagram is very simple.Song Wu basically figured it out after a little research, and he felt that he would be able to get started immediately.

The core component of the ore machine is a detector made of ore. Galena ore is generally used, but natural copper can also be used.

Song Wu started running to collect various accessories.

He didn't know where to buy these accessories at first, so he was just running around like a headless fly.Finally, he went to the counter inside the store to buy a radio. A middle-aged salesperson told him that there was a special store selling electronic accessories at Chongwenmen.

This time, he finally found the place.

In the electronic hardware store here in Chongwenmen, he can basically buy all the accessories he needs.

There are not only fixed ores here, but also movable ores.There are coils and capacitors.There are also headphones and earbud machines available.

"Comrade, may I ask what kind of ore we have here?" Song Wu asked the salesperson wearing glasses.

"Galena is generally sold in stores. If you want to use natural copper, you can go to a traditional Chinese medicine store to find it. However, natural copper has few detection points, average sensitivity, and poor stability. It is easy to use. Not as good as galena.”

Every word the salesperson said was a point of knowledge for Song Wu, and he kept it in mind very carefully.

The ore sold in the store is packaged in a glass sealing cover, and you can see a piece of ore the size of a soybean inside.

"So this is the ore machine?" It's true that seeing is better than hearing. No matter how much you read the words in the book or think about it in your mind, it's better to see it with your own eyes.

This kind of finished ore probably costs about one yuan.The coil costs 5 cents and 9 cents, and the earplug machine costs 8 cents.

Of course Song Wu wanted to use high-impedance headphones with better effects.However, he asked about it and found that the price was quite expensive. A pair of youth brand cost more than ten yuan.

as a novice.

And I am a novice who is not short of money. Since I have started to get started, I need to get everything. I would like to buy a pair of such expensive headphones first, and in addition, I can buy two or three earphones.

Song Wu bought three sets of accessories.But I didn’t buy an electric soldering iron, only a fire soldering iron.

He asked the salesperson in detail how to use the hot soldering iron.

"This is too inconvenient." Song Wu thought to himself. Every time he used it, he had to heat it on the fire. It was too difficult to control.This reminded him of someone who curled their own hair after heating iron clips on a coal stove, and he could smell the smell of burnt protein every time.

I have no choice, I can't buy a soldering iron, so I can only make do with this first, at least get it moving first.

Although Song Wu's basic knowledge of electronics is shallow, his hands-on ability is very strong. After all, the basics of fitter are there, especially his opponent's control is very good.

With the complete set of accessories he bought, he easily assembled a so-called mineral radio.

But at the last step, when it was his turn to pull out the antenna, he was in trouble again. In order to find usable scrap copper wire, he had to go to the scrap collection point again.

As a result, there was an unexpected discovery here.

Not only did we find usable scrap wires, but we also found scrap enameled coils.What pleased him most was the discovery of two more books.

One book was "How to Make Your Own Ore Detector". I picked it out from the garbage dump and found that it was actually a book written by the Soviets and had been translated into Chinese.

Another book is called "How to Wind a Coil". The cover and packaging are in the same style as the one just now. It is also a Soviet book and was probably published at the same time.

Both books are not too thick and are now completely different, but the contents are still intact.

Song Wuzheng found it unsatisfying to buy finished parts and just assemble them.

Now, when you feel sleepy, someone will give you a pillow.Now, based on the two books I originally bought at Xinhua Bookstore, I can make all the accessories by hand.

We’ve already started assembling the radio, what’s the point if we don’t wind the coil ourselves?

Looking at it this way, it seems that the waste recycling station is also a good place, and I should visit it more often when I have nothing to do.Anyway, his car repair shop used to deal with this place often, so he could be considered an acquaintance.

"Lao Jin, if you encounter similar books in the future, keep some of these wires and accessories for me." Song Wu went to the purchase point and patted a pack of cigarettes in Lao Jin's hand.

After returning home, Song Wu began to set up an antenna on the roof of the east wing.

People in the courtyard saw him jumping up and down, and gradually some people began to come out curiously to look at him, but no one asked.

He set up the antenna, dug a small hole one meter deep at the door of the house, buried a scrap iron plate underneath, and wrapped a copper wire lead around it to serve as a ground wire.

The exciting time has come.

Song Wu connected the earphone cable to the terminal, slightly moved the probe on the ore, and adjusted the contact point. Soon a clicking sound came from the earphones, and then he adjusted it slightly, and it was done!
The sound of a radio station that was not loud but fairly clear came from the earphones. It was BJ Radio.

He climbed to the roof and adjusted the antenna from time to time as needed, and came down to flip the probe. Finally, he determined that the mineral radio he assembled for the first time could only receive two stations.

No one can say how many ore machines can be harvested. It can only depend on luck. His luck can only be said to be good or bad.

Once you have a successful first time, you must strike while the iron is hot.

He reassembled one using finished parts.This time my hands are more proficient, the whole machine is more complete, and I have better luck.

After adjusting it, I found that I could receive 4 stations, including the radio station in Tianjin.The most important thing is that the signal reception seems to be better and the sound is clearer.

Song Wu was greatly encouraged by the success of two machines in a row. Next, he wanted to take on the challenge of making the accessories himself and assembling an ore machine that was completely his own.

Galena is hard to find, but you can try it with natural copper first.It just so happened that a lot of people were visiting medicine shops during this period, so they were already familiar with the business.It turned out that he hadn't paid attention to it, and he didn't expect that there were things like natural copper in the small medicine cabinets.

In fact, although natural copper has the word "copper" in its name, it has nothing to do with copper. It is just a kind of iron sulfide ore.

It’s just that in traditional Chinese medicine, it’s called natural ketones.

This time Song Wu made the ore detector by himself, and then wound the coil himself. It was obviously much more fun than simply assembling it with finished parts.Of course, the challenge is also greater.

However, the actual result was much smoother than expected. Without any accidents, Song Wu's first completely handmade mineral radio was born.

After the final adjustment, it was discovered through experiments that the listening effect of this machine is indeed not as good as that of the two ore machines assembled with finished parts. This may be related to the natural copper ore.

However, in Song Wu's eyes, he still preferred this completely handmade machine.

Before Song Wu had time to experience the joy of success, he first received two public security policemen who came to check.

He had been very involved in assembling the ore machine in the past two days, and he didn't even have a good meal. The shop in front of him didn't open much, and he looked a bit unkempt.

Hearing a knock on the door, he opened the door and saw two policemen standing at the door.

The two police officers were acquaintances from the Hongxing Police Station, and they were quite polite when talking to Song Wu.

"Song Wu, we received a report that you were sending and receiving information at home, and you are suspected of being an enemy agent." Although the expressions on their faces were polite, the two police officers with sharp eyes looked past Song Wu's body and looked straight into the house.

"Shall I send and receive information?" Song Wu was still confused.

The police had already entered the house by themselves, and soon saw the ore radio assembled by Song Wu.They pointed to the things on the table and asked Song Wu.

"What is this?" A police officer picked up the headphones and put them on his ears, but his expression quickly changed from serious to surprised.

Song Wu smiled and said: "It seems that I don't need to explain it. You can just take it and listen to it and you will know."

……

(End of this chapter)