Chapter 32 Recently, I'm short of money

Lin Hong and Sun Wu connected four bamboo poles, which were more than ten meters long, and then worked together to set them up and leaned against the trunk. And before that, the metal wire was fixed to the bamboo pole with a self-tapping screw.

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

At the beginning, Sun Wu asked this and that from time to time, but Lin Hong opened his mouth to some extremely professional terms. He couldn't understand it at all. Later, he was simply unstable. He did what Lin Hong asked him to do.

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

"Wait a minute." Lin Hong turned around and took out a pair of scissors from the room. "Take this with you."

"Oh." Although he didn't understand, Sun Wu nodded, then climbed up, stood on one of the branches, and then grabbed the bamboo pole in one hand, waiting for Lin Hong's next instructions. For children in the countryside, climbing trees has no technical content at all. They usually do a lot of knowledge and digging bird's nests.

"You wait on it first, and I have to debug it."

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

Then, he quickly ran back to the room and began to test the relevant parameters. He took out an instrument about the size of a multimeter, and there was also a dial on it. This instrument is a standing wave meter made by Lin Hong with a scrapped multimeter, which can be specially used to measure the standing wave ratio of the antenna.

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

He continued to debug and found that the standing wave was the smallest at the frequency point of 26.00, and at 29.00, the standing wave ratio had reached 2:1, which was quite large.

"It seems to be cut a little shorter."

So, Lin Hong lay down at the window and shouted to Sun Wu on the tree, "Wu Zi, cut off five centimeters."

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

Lin Hong had to say, "Your fingers are probably that long... index finger."

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

"Okay. Can I come down?"

Lin Hong: "Wait a minute."

Lin Hong returned 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 ten centimeters. In this way, it was cut three times before the optimal length was finally determined.

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

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

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 it off. This is not a casual cut, and the length left is exactly a quarter of the length of the antenna.

Then, he took out a ten-centimeter nail from his pocket, tied the end of the plastic copper wire to the nail, and then hit the nail deep into the ground with a hammer.

Repeated like this, the three plastic copper wires have been processed separately, 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 not until this time that the antenna was really set up.

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

Originally, it was also possible to make a fire and cook here, but because Lao Sun moved back to live, he simply stopped. He and Lin Hong went home to eat separately. After dinner, they lived here.

Both of them are very satisfied with this kind of life. Sun Wu is more free to live here. Without his grandfather staring at him every day, he is simply a high-flying bird. Needless to say, Lin Hong's radio stations are set up here, and he can't sleep at night. Naturally, he is like a fish in water.

In the early morning of the next day, after Sun Wu got up, he saw that Lin Hong was still playing something on the workbench. He couldn't help walking over and said:

"I said you really don't have to sleep?" He has almost never seen Lin Hong sleep.

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

The word insomnia was heard by Lin Hong from the doctor.

"Insomnia should also take a break. If you keep doing this, it's no wonder you don't have a headache!" Sun Wu said casually.

When Lin Hong heard the words, he looked up at him, and then lowered his head and continued to weld a component in his hand with an electric soldering iron.

Although he didn't say anything, he was seriously considering what Sun Wu just said in his heart.

Maybe the cause of the headache is really because I didn't have a good rest.

But how can you rest and relax your brain?

Lin Hong is also very distressed about this matter. He has closed his eyes many times and forced himself to rest, but his brain seems to be running automatically all the time. Countless contents always "appear" in front of his eyes, making his heart unable to calm down at all.

"It's sunny outside. Go out for a walk with me." Sun Wu suggested, "My cousin said, take me to a fun place today. You can go with me and fix the color TV by the way. I've been short of money recently... hey hey!"

At this time, Lin Hong also just soldered the things in his hand. He blew the solder debris on it, and then picked up the multimeter next to him to measure it. While testing, he replied, "Wait for me. I'll adjust this day first and go together."

Yesterday, he tested the effect of the antenna, which is generally good, but later he found that the characteristic impedance of the antenna is still different from that of the transceiver, so that part of the power transmitted to the antenna will be reflected back, forming a relatively strong standing wave. It may be okay 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. The final result is the tune in his hand.

"Good!" Sun Wu was very happy when he heard the words, so he waited.

Lin Hong detected some parameters of Tiantun and felt that there was no problem, so he replaced the original Tiantun connected in series on the antenna and the radio. Then put on the headphones, turned on the radio, adjusted to the 40-meter band, and soon received several amateur radio stations in Japan. Then he took out the standing wave meter and continued to adjust several frequency points. He found that this time the standing wave was finally reduced to an acceptable range, so he nodded with satisfaction.

Sun Wu looked at it. It's false to say that he didn't care about Lin Hong's baby, but if he really wanted him to read those heavenly book-like technical books in order to play this, it would be better to kill him. He prefers to play ready-made, stupid, and can pretend in front of others.

In this regard, he admires Lin Hong from the bottom of his heart. Such a complicated thing, in Lin Hong's eyes, is just like playing. He can casually make a more awesome radio than in the city's stores.

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

Sun Wu said that he could not understand Lin Hong's abnormal thinking at all.

====

Xiaoqiang is rushing to the list and continues to vote for support. Brothers, please vote after reading. Thank you!