After the army asked Fu Xin to take him to sign up for a radio license, he didn't stay here with Fu Xin, but went home and waited for Fu Xin's other news.

Therefore, Fu Xin and Zhao Changfeng drove straight to the army's house in Shixiang Township.

The rain is still falling, so along the way, the road is very difficult to walk, but fortunately, Zhao Changfeng is a military jeep, so he still arrived at the army's home safely.

When this military vehicle came, Lu Tie and Lu Xuan were still pale with fright, obviously what happened some time ago did not remove the shadow in their hearts.

It wasn't until Fu Xin jumped out of the car that Fu Xin had already made an estimate before, so he shouted loudly: "Brother Jun, come out quickly, there is something good!" Lu Tie and Lu Xuan, who were peeking on the side, only recovered a little.

After waiting for a minute or two, there was no movement in the house, and then Lu Xuan walked out of the kitchen next to him, and cautiously tentatively said, "Section Chief Fu, do you have anything to do with my brother?" ”

Fu Xin glanced at the source of the voice and found that it was Lu Xuan, and then hurriedly said, "Oh, it's Comrade Lu Xuan!" It's a little thing, but it's a good thing! As for your brother, tell him to come out! ”

At this point, if something really happens, if you want to hide, you can't hide Lu Xuan cautiously pointed to a room in the house with a closed door, and said: "In this, I can't figure out what he's doing, he should be tinkering with an important object." ”

"You don't know anything? No, your brother told me that you know a little bit about radio technology under his nose. Fu Xin said in disbelief.

Lu Xuan didn't answer immediately, but thought about it, and then said: "I really don't know very well, when my brother is in that room, he will lock the door and not allow anyone to enter, so I really don't know very well, I just heard what he mentioned about the signal filter when he had dinner last night, he didn't elaborate, and I don't know much, but I estimate that it should be an important thing." ”

"Signal filter? Are you serious? Liu Xiaojun, who came with him, suddenly interjected and said, because he knew some radio, radar and other technologies, Zhao Changfeng specially called him.

"yes." Lu Xuan nodded and said.

Liu Xiaojun patted Fu Xin's shoulder at this time, and then said with emotion: "Fu Xin, it seems that your kid has caught a piece of treasure!" Your kid's luck is really against the sky! ”

"How?" Zhao Changfeng, who was standing on the side, heard Liu Xiaojun say this, and realized that this signal booster must be a good thing, so he grabbed in front of Fu Xin and asked curiously.

"Let me explain, this signal filter is something I mentioned to him a few days ago, but I didn't expect him to actually study it." Fu Xin said with satisfaction that as a boss, it is really good to find such a pioneering and dedicated employee.

Fu Xin walked in with Lu Xuan, sat down, and continued: "With the country's step by step towards rejuvenation, there are now more and more interference signals in the air, which has no impact on ordinary people, but for ham like me, it is troublesome, and the radio station has received more and more noise signals, which is really irritating."

So, when I was chatting with him the other day, I mentioned this kind of thing and asked him if he could make it, but I didn't expect that he was really studying this thing now! You know, there is no signal filter in China, of course, I'm talking about the general situation, as for those special institutions, I don't know. ”

Zhao Changfeng frowned and said, "In other words, this thing is an advanced product for our country?" ”

"I'm afraid so!" Fu Xin said with a wry smile that the country's level of scientific and technological development is still a little backward, and such a simple signal filter has become an advanced product.

Zhao Changfeng is not concerned about the problem of whether the country is backward or not, what he cares about is that if this thing is too advanced, will it have an impact on the country's radar defense system, so as to evade radar monitoring, if this is the case, then the above should start to study the anti-signal filter, otherwise this kind of big killer is controlled by spies, it is really troublesome!

Zhao Changfeng knocked on his skull, and said with a headache: "Then will this thing filter the radar signal?" ”

Really, the previous problem has not been solved, but he has just seen a glimmer of light, and now he has found a new problem, which is really a headache for him!

"If the quality is good, I think it should be able to filter some radar signals." Fu Xin replied cautiously, he had just thought of this aspect, so he didn't dare to speak casually.

"This lesbian, can you help us get your brother out?" Zhao Changfeng thinks it's better to ask someone who knows more about this area.

"Alright! I'll knock on the door and try it! Although Lu Xuan was reluctant to go, because she knew that if she went to disturb the army, she would definitely be scolded, and the army dared to scold her on this matter, and she didn't dare to fight back. But there is no way, the people do not fight with the officials, and it is better to obey the orders of this kind of chief.

"Bang! Boom! …… Boom! Lu Xuan gently slapped the locked wooden door on the wall a few times, and shouted, "Brother, come out!" ”

As soon as Lu Xuan's voice fell, an angry voice came from inside: "How many times have I told you, when I'm inside, don't come to disturb me, why can't you remember!" ”

"Smack! Boom......! The army opened the door angrily, and shouted at Lu Xuan with horizontal eyebrows: "What's the matter, say it!" ”

Lu Xuan was a little frightened by the army's angry appearance like a male lion, shrunk his neck, and pointed towards the place where Fu Xin was sitting.

At this sight, the army was so frightened that he almost didn't stand firm, took a few steps back, and looked at the comrades in military uniforms who were sitting there talking to Fu Xin with some horror.

"These comrades, you came to me, is there anything wrong?" The army no longer looked angry just now, but cowered, walked to Fu Xin's side nervously, and cautiously probed.

"Oh! That's right, we heard this comrade Fu Xin next to me say that your parents are radar researchers, and you, who are also radio enthusiasts, are very proficient in the field of radio!

And it just so happens that there is a little problem with our radar, which has not been solved, and we heard that you are very researched in the field of radio, so we specially came to you and wanted to ask for your help! Zhao Changfeng stood up and said.

"Oh, I'm not very proficient either, hehe!" When the army heard that it was not to arrest him, but to ask him for help, this made him relieved, crossed his fingers together, and said worriedly.

"What are you doing now? Can we go in and have a look? Zhao Changfeng was still very curious about the signal jammer that the army was researching, so he brought it up and wanted to enter the army's "laboratory" to see what this signal jammer was.

"Alright! Come with me. "The army has nothing to worry about this, he is not afraid of exposing anything, even if the radio station is exposed, he is not afraid, and now he has signed up for the radio license exam, with this thing, it can be said.

Walking into this "laboratory" of the army, what caught the eyes of Fu Xin and others was first a messy table full of things, needless to say, this is the army's workbench.

Near the side of the army seat, there was a small space with three things on it, a soldering iron, a broken and somewhat yellowed notebook, and a small circuit board, the size of a matchbox, densely soldered with components such as resistors, capacitors, and chips.

Needless to say, soldering irons are used to solder components and wires.

Fu Xin and the others approached to see, only to see that on the yellowed notebook, there were neat circuit diagrams drawn with a pen, the lines were very regular, straight and symmetrical, and between the components, in the eyes of Fu Xin and Liu Xiaojun, it was very reasonable. Obviously, the army has put a lot of thought into these circuit diagrams.

The small circuit board, which is densely packed with components, has old and new, and the new is needless to say, which must have been brought by Fu Xin to the army a few days ago, and as for the old ones, they should have been dismantled by the army from some worn-out electrical appliances and made out of the left and right.

Next to the workbench, there is a wooden table with the height of a coffee table, and from the fact that this wooden table is not polished, but is connected together with some iron nails, it can be seen that this is probably built by the army itself.

On the wooden table, there is a big guy, a cube of wooden cabinets, the wooden cabinet is still a wooden shell of the guy, facing the outside of the side, there are a lot of knobs, next to the wooden shell of the guy, put this pair of headphones, a few antennas, and some wires, needless to say, this wooden shell of the guy, is the army's own radio station.

There is a door on the wooden cupboard, the door of the wooden cupboard is not closed, there is a ring on the door, and a copper lock is hung on the ring. They all know that the Army's radio license has not yet been obtained.

"Comrade Army, are you making a signal filter?" Zhao Changfeng asked.

The army did not answer immediately, but glanced at Fu Xin, and when he saw Fu Xin nodded, he explained: "Yes, I had some ideas about the signal filter before, and I discussed it with Brother Fu a few days ago, and I had some new ideas."

Then, I went home and thought about it carefully, and felt that what Brother Fu said was right, and then I started to design the circuit diagram, and by yesterday afternoon, I finally got the circuit diagram out, and now I am making a real thing to verify whether it is feasible. ”

ps: It's Friday, ask for a Sanjiang ticket! Ask for a referral ticket!

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