Lin Hong and Sun Wu joined four bamboo poles, which were already more than ten meters long, and then worked together to erect them and lean against the trunk of the tree. And before that, the metal wire was fixed on the bamboo pole with self-tapping screws.

Lin Hong then screwed together the three plastic copper wires used to make the ground netting with screws and iron sheets, and connected their common points to the lower end of the bamboo poles. In addition, a wire was split and connected directly to the radio station through the window.

When Sun Wu first started, he still asked this and that from time to time, but what Lin Hong opened his mouth to come with was some extremely professional terms, which he couldn't understand at all, and then he was simply unstable, and he did what Lin Hong asked him to do.

"Do I need to climb up?" Sun Wu asked.

"Wait a minute." Lin Hong reflexively took a pair of scissors out of the house, "Take this with you." ”

"Oh." Although he didn't understand, Sun Wu nodded, and then climbed up and stood on one of the branches, then grabbed the bamboo pole in one hand, waiting for Lin Hong's next instructions. For the children in the countryside, there is no technical content at all, and they usually grasp and dig out the bird's nest.

"You wait up there, I'll have to debug it."

Lin Hong straightened and placed three plastic copper wires on the ground, and the angle between the copper wires and the copper wires was 120 degrees to form a temporary ground net.

Then, he quickly ran back to the room and began to test the relevant parameters. I saw that he took out a meter about the size of a multimeter, and there was also a dial on it, this instrument was a VSWR made by Lin Hong using a scrapped multimeter, which could be specially used to measure the VSWR of the antenna.

"The resonant frequency is a little low." Lin Hong muttered to himself.

He continued to debug and found that at 26.00 the VSWR was the smallest, and at 29.00, the VSWR had reached 2:1, which was quite large.

"It looks like it's going to be shortened."

So, Lin Hong leaned on the window and shouted to Sun Wu on the tree: "Wuzi, cut off five centimeters." ”

"How long is five centimeters?" Sun Wu asked. He really had no idea about the length.

Lin Hong had no choice but to say, "Probably your fingers are that long...... Index finger. ”

"Oh." After hearing this, Sun Wu picked up the scissors and cut off a piece of the metal wire tied to the bamboo pole.

"Alright. Can I come down? ”

Lin Hong: "Wait a minute. ”

Lin Hong went back to the front of the radio station to re-debug, and later found that the resonance frequency was still a little low, so he asked Sun Wu to cut off ten centimeters. This goes on and on, and it takes a total of three cuts to finally determine the optimal length.

"You can tie a bamboo pole to the trunk and you can come down." Lin Hong stood under the tree and said.

Sun Wu first threw the scissors down, then jumped from the tree after tying the bamboo pole tightly to the trunk with a nylon rope.

Lin Hong picked up the scissors on the ground, then took out a tape measure, measured the plastic copper wire on the ground, and then cut off a section. This is not cut randomly, leaving exactly a quarter of the length of the antenna.

Then, he took out an iron nail of about ten centimeters from his pocket, tied the end of the plastic copper wire to the iron nail, and then used an iron hammer to drive the iron nail deep into the ground.

Repeating this, the three plastic copper wires are processed respectively, and the angle between each plastic copper wire is exactly 120 degrees. These three copper wires make up the ground network part of the entire antenna.

It was only at this time that the antenna was actually set up.

Sun Wu's mission was completed, so he went home for dinner.

Originally, it was also possible to make a fire here for cooking, but because the old grandson moved back to live later, he simply stopped, and he and Lin Hong went home to eat, and after eating, they lived here again.

Both are very satisfied with this life. Sun Wu is more free because he lives here, and without his grandfather staring at him every day, it is simply a sky high for birds to fly. And Lin Hong needless to say, his radio station is set up here, and he can't sleep at night, so he is naturally like a fish in water.

Early the next morning, after Sun Wu got up, he saw that Lin Hong was still tinkering with something on the workbench, so he couldn't help but walk over and said:

"I said you kid really don't have to sleep?" He had hardly seen Lin Hong sleep.

Lin Hong: "Insomnia, I can't sleep at all." ”

The word insomnia was still heard by Lin Hong from a doctor.

"You should also take a break from insomnia, it's no wonder that your head doesn't hurt if you keep doing this!" Sun Wu said casually.

Hearing this, Lin Hong raised his head and glanced at him, then lowered his head and continued to weld one of the components in his hand with an electric soldering iron.

Although he was noncommittal, his heart was seriously considering what Sun Wu had just said.

Maybe the cause of the headache is really because I haven't rested well.

But how can you rest and relax your brain?

Lin Hong was also very distressed about this matter, he had closed his eyes many times and forced himself to rest, but his brain seemed to be running automatically, and countless contents were always "appearing" in front of his eyes, making his heart unable to calm down at all.

"It's sunny outside, let's go out for a walk with me." Sun Wu suggested beside him, "My cousin said, take me to a fun place to see it today, you go with me, and by the way, the color TV will be repaired." I've been strapped for money lately...... Hey! ”

At this time, Lin Hong also happened to solder the things in his hand, he blew the soldering chips on it, and then picked up the multimeter next to him and measured it. While testing, he replied: "You wait for me, I'll get this day adjusted first." ”

Yesterday he tested the effect of the antenna, and it was generally good, but later he found that the characteristic impedance of the antenna and the characteristic impedance of the transceiver were still different, so that part of the power transmitted to the antenna would still be reflected back to form a relatively strong standing wave. It may be fine in a short time, but after a long time, the transmitter may be burned, so he checked the reason overnight, and then redesigned the matching network, and the final result is this Tiantuo in his hand.

"Okay!" Sun Wu was immediately very happy when he heard this, so he waited honestly on the side.

Lin Hong checked some parameters of the antenna and felt that there was no problem, so he replaced the original antenna that was connected in series on the antenna and the radio. Then put on headphones, turned on the station, tuned to the forty-meter band, and soon received several amateur radio stations in Japan. Then he took out the standing wave watch and connected it, and continued to adjust the frequency several times, and found that this time the standing wave had finally decreased to an acceptable range, so he nodded with satisfaction.

Sun Wu was itching to see it on the side, it would be false to say that he was not interested in Lin Hong's treasure, but if he really wanted to read those technical books like heavenly books in order to play this, it would be better to kill him. He prefers to play ready-made, foolish, and can pretend to be forced in front of others.

In this regard, he admires Lin Hong from the bottom of his heart. Such a complex thing, in Lin Hong's eyes, is like playing, and he can casually make a radio that is even better than the one in the city store.

However, he couldn't understand why Lin Hong was so low-key. There is such an awesome thing, and no one tells it, and hides in the room every day to play alone. It's not interesting, good things should be known to everyone, otherwise who knows that you are so powerful?

Sun Wu said that he couldn't understand Lin Hong's abnormal thinking at all.

====

Xiaoqiang is in the list, continue to vote support, brothers, please vote after reading, thank you!

Seek demons