Lin Hong carefully wrote the address of the QBB on a workbook next to him, but the other party still did not reveal her name to him, just asked him to write her call sign directly. Originally, Lin Hong thought that she would not be able to receive it, but QBB said that Lin Hong would rest assured that she would definitely be able to arrive.

Since the other party said so, Lin Hong followed her.

After that, the two chatted for a while about other topics, but mainly QBB was talking, talking about some interesting things about their school and some of her worries as class president. Lin Hong also had a general understanding of the difference between schools in the city and schools in the countryside.

At the end of the day, QBB mentions that his brother has recently been preparing to participate in a world ham tournament called "cqww_dx_contest", and has been preparing for this for several weeks. Now that Lin Hong has obtained the second-level certificate, she casually suggested that Lin Hong might as well participate in it, so as to test what level of his skills is in the world.

Subsequently, QBB went offline, she still had homework to do, and she couldn't talk too late.

"cqww_dx tournament?"

Lin Hong heard about this competition for the first time. Although he had heard them occasionally talk about the event when he communicated with other hams before, Lin Hong never paid attention to it, and he put all his mind on improving his radio station and collecting QSL cards frantically.

On the wall of the room, there is a map of the world, on which most of the regions are already covered with small red flags, indicating that these countries and regions have been "occupied" by him. Basically, he has communicated with all the countries and regions that he can connect.

In the concept of the ham clan, "country" contains another meaning, which is quite different from the meaning usually referred to.

The American Amateur Radio Association (ARRL) divides the world into more than 330 entities, which are also called "countries", which are different from "countries" in the political sense, and a political sense of the country may include multiple amateur radio "countries", for example, for the ham people, Chinese mainland, Hong Kong, Macau, Taiwan, Dongsha Island, Scarborough Shoal and Nansha Islands belong to seven different "countries".

Among the more than 330 countries, they can be roughly divided into common countries and rare countries, such as the United States and Japan, while China's Huangyan Island, located in the Zhongsha Islands, is not far from us, but because it is an uninhabited reef, it belongs to a very rare country.

Sometimes, in order to be able to communicate with the ham of a rare country, Lin Hong often squatted on a channel all night without results, which is a great test of skill and patience.

In the past three years, Lin Hong has successfully communicated with thousands of people around the world, and has successfully exchanged QSL cards with about 200 of them. Among the two hundred, only three foreign friends have established a deep friendship with him.

One of them is a young man who is studying in college, located in Finland, with the call sign oh3lus, the technology is very powerful, and he likes to study new things, Lin Hong often discusses with him some of the latest technology in the field of radio, and is an important source of information for Lin Hong in the field of radio.

There is also an elderly American old man, whose call sign is n7lzt, who has been playing radio for 30 years, and is a "grandmaster" figure in this field, Lin Hong speculates that he may be more powerful than Lao Xu Tou in this regard, Lin Hong usually asks him for some questions that he can't usually figure out. And the other party also likes to answer Lin Hong's questions, because Lin Hong's questions are often very difficult, according to the other party, they are "creative and inspiring".

The rest is an American girl, the call sign is w5aun, Lin Hong speculated that the other party may be about the same age as himself, at first he didn't understand anything, and he plunged into the world of amateur radio in a daze, Lin Hong heard her call, remembered himself a few years ago, so he learned QBB, and made a cameo appearance as her introductory tutor, but he didn't expect the other party to be really a little talented, and soon got started and got his own radio license and call sign, and since then he has established a deep friendship with Lin Hong.

However, most of the time the topics between Lin Hong and her are not about technology, most of the time, Lin Hong still acts as a mentor, but he has changed from a technical mentor to a psychological mentor. The little girl's parents have long been divorced, and they usually care too little about her, and in the dead of night, I often hear the little girl crying and crying to him on the radio.

Lin Hong himself knows very little about the competition in the amateur radio world, but he knows that Finland's oh3lus must know, and he is very good at it, because Lin Hong often hears him say on the radio how he has achieved excellent results in what competition, but at that time Lin Hong did not care about this kind of competition, so the other party gradually rarely mentioned it in front of him.

Lin Hong picked up the voice pager, adjusted the radio frequency to the long-distance shortwave communication gear, and then began to call in English:

"oh3lus_this_is_bd7xzz_calling_and_standying_by......" (oh3lus, here bd7xzz is calling and listening)

After three years of hard self-study and continuous practice, Lin Hong has become very fluent in English, can speak directly with Americans without any obstacles, and is also familiar with a variety of electronic and electrical professional vocabulary, because of his super memory, he can even imitate a few people with regional American accents to speak, such as New York accent and Washington accent, people who are not reluctant, but also think that he has spent a long time in these two places.

Lin Hong didn't call once, so he stopped for about ten seconds or so, so that the other party had a buffer reaction time. After calling like this five or six times, he received a reply. Coincidentally, the other party had just returned home from supper with his friends, and if it had been earlier, Lin Hong might have to wait for a long time.

There is a six-hour time difference between China and Finland, China is the East 8th Zone, and Finland is the East 2nd Zone, so the sun is seen six hours later than China.

First of all, Lin Hong explained the reason for his title change, and the other party was very happy to congratulate him on his successful promotion.

Then, Lin Hong asked about the "cqww_dx Competition".

The other party really knew this competition very well, and he was very happy to hear that Lin Hong was finally interested in this kind of competition, and it took a long time to tell Lin Hong everything about this competition.

It turned out that this was an international amateur radio amateur competition sponsored by CQ magazine in the United States, and it was one of the most influential and most participated events in the radio industry. There are three main modes of communication, namely Single Sideband Telephone (SSB), Equal Width Telegraph (CW) and Radio Telex (RTTY) mode.

The SSB communication mode usually refers to the voice mode that Lin Hong usually uses the most, while the CW mode uses electric key buttons to communicate by sending a long and a short Moss code.

What surprised Lin Hong the most was that there was a model called RTTY. He had never used this model before, and although he had seen a few words about it in the literature, he had ignored it because he had not seen further details. It wasn't until today that he learned from oh3lus that the RTTY mode is also one of the most popular communication modes in the world.

After his repeated questioning, he finally had a general understanding of this model.

In fact, the RTTY model has been around since World War II, when the technology originally used for wired teletype was transferred to radio to transmit text, and after the war, some amateur radio personnel began to use some of the equipment that had been replaced to carry out amateur communications.

However, since the advent of electronic computers, the ancient teletypewriter has since withdrawn from the stage of history and has been completely replaced by electronic computers.

The radio station is connected through the electronic computer to realize the automatic sending and receiving of signals, although it is still necessary to manually modulate and search for the station, and the communication efficiency and speed have been qualitatively improved.

Now, thanks to the advent of personal computers, the RTTY model has developed very rapidly, oh3lus said.

This day was the first time Lin Hong really came into contact with the concept of computers.

====

Lin Hong finally heard about the computer~ Brothers, shouldn't they smash the votes?

Seek demons