♂?，，

  Lin Hong carefully wrote QBB's address on a nearby notebook, but the other party still didn't reveal her name to him, only letting him write her call sign directly. Lin Hong originally thought she wouldn't receive it this way, but QBB told Lin Hong not to worry, it would definitely arrive.

  Since she said so, Lin Hong just went along with her.

  After that, the two of them chatted a bit more about other topics, but mainly qbb was talking, telling stories about her school and some troubles she had as class monitor. Lin Hong also roughly understood the differences between city schools and rural schools.

  At the end, QBB brought up a matter, saying that his brother had been preparing for a world-class ham radio contest called "CQ" recently, and had already prepared for several weeks. Since Lin Hong had obtained a second-level certificate, she casually suggested that Lin Hong might as well go to participate, so as to test the level of her technology internationally.

  Then qbb went offline, she still had homework to do and couldn't chat too late.

  "What's the CQWW_DX contest?"

  Lin Hong first heard about this competition. Although he had previously communicated with other hams and occasionally mentioned some content related to the event, Lin Hong had not paid attention to it, and his mind was focused on improving his radio station and crazily collecting QSL cards.

  On the wall in the room, there is a world map with most areas filled with small red flags, indicating that these countries and regions have been "occupied" by him. Basically, all the countries and regions that can be connected to, he has connected to.

  In the concept of Hamitic, "nation" contains another meaning, which is quite different from the usual meaning.

  The American Radio Relay League (ARRL) divides the world into over 330 entities, which are also called "countries", and distinguished from the political meaning of "country". A single political country may be included in multiple amateur radio "countries", for example mainland China, Hong Kong, Macau, Taiwan, Pratas Island, Scarborough Reef and Spratly Islands are each considered separate "countries" for ham radio purposes.

  Among these 330 or more countries, they can be roughly divided into common countries and rare countries. For example, the United States and Japan belong to common countries, while Huangyan Island of China, located in Zhongsha Islands, is not far from us, but because it is an uninhabited reef, it belongs to a very rare country.

  Sometimes, Lin Hong would squat on a channel for an entire night in order to make contact with a rare country's ham radio operator, and it was possible that there would be no results, which greatly tested his technical skills and patience.

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

  One of them is a young man studying at university in Finland, with the call sign oh3lus. He is very skilled and likes to study new things. Lin Hong often discusses some of the latest technologies in the field of wireless electronics with him, and he is an important source of information for Lin Hong in the field of wireless electronics.

  There is also an old American man, callsign n7lzt, who has been playing with radios for over 30 years and is a "master" in this field. Lin Hong speculates that he may be even more formidable than Old Xu in this regard. Lin Hong usually asks him questions about problems that he can't figure out on his own. The other party also likes to answer Lin Hong's questions, because Lin Hong's questions often have extremely high difficulty, and according to the other party's words, they are "full of creativity and inspiration".

  The rest is an American girl, call sign w5aun. Lin Hong speculated that the other party's age might be similar to his own, and at first, he didn't understand anything either, but he dived into the world of amateur radio in a muddle-headed way. After hearing her call, Lin Hong thought of himself a few years ago, so he pretended to be QBB and played the role of her entry-level instructor. However, he did not expect that the other party really had some talent, quickly entered the door and obtained his own amateur radio license and call sign, and thus established a deep friendship with Lin Hong.

  However, the topics of conversation between Lin Hong and her were not often about technology, but rather Lin Hong still played the role of a mentor, albeit one who had shifted from technical guidance to psychological counseling. The little girl's parents had long been divorced, and they rarely showed concern for her; in the quiet hours of the night, she would often cry and pour out her heart to him on the radio.

  Lin Hong himself knew little about the amateur radio world's big games, but he knew that Finland's OH3LUS would definitely know and be very familiar with it. Lin Hong often heard him say on the radio that he had achieved excellent results in some competitions, but at that time Lin Hong was not concerned about such events, so the other party gradually rarely mentioned it in front of him.

  Lin Hong picked up the voice caller, adjusted the radio frequency to the long-distance short-wave communication band, and then began calling in English: "G and standing by......" (Oh3Lus, this is BD7XZZ calling and listening).

  After three years of hard self-study and constant practice, Lin Hong's English has become very fluent, allowing him to converse directly with Americans without any obstacles. He is also familiar with various professional terms related to electronics. Due to his exceptional memory, he can even imitate the accents of people from several American regions, such as New York and Washington D.C., to the point where others might think he had lived in those places for a long time.

  Lin Hong didn't call out again, instead stopping for about ten seconds to give the other person a buffer reaction time. After calling out five or six times like this, he received a response from the other side. It just so happened that the other person had just finished having a late-night snack with friends and was on their way home; if it had been any earlier, Lin Hong might have had to wait for a very long time.

  China and Finland have a six-hour time difference. China is in the Eastern 8th Time Zone, while Finland belongs to the Eastern 2nd Time Zone, so they see the sun six hours later than China.

  Firstly, Lin Hong explained the reason for his title change, and the other side was very happy to congratulate him on his successful promotion.

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

  The other party was indeed very familiar with this competition, and when he heard that Lin Hong had finally taken an interest in such competitions, he was also extremely happy, and spent a long time carefully telling Lin Hong all the information about this tournament.

  It turns out that this is an international amateur radio hobbyist competition sponsored by the American CQ magazine, which is one of the most influential and largest-scale competitions in the radio industry. There are mainly three communication modes for the competition, namely single-sideband voice (SSB), Morse code (CW) and radioteletype (RTTY).

  SSB communication mode usually refers to the voice mode used by Lin Hong most of the time, while CW mode uses a telegraph key to send Morse code through long and short signals for communication.

  What surprised Lin Hong the most was that there was actually a mode called RTTY. This mode he had never used before, although he had seen some brief mentions of it in materials, but since he hadn't seen any further detailed information, he had always ignored it. Until today, he learned from Oh3Lus that RTTY mode is also one of the most popular communication modes in the world at present.

  After his repeated inquiries, he finally had a general understanding of this pattern.

  In fact, RTTY mode appeared during World War II. At the beginning, it was to transfer the technology originally used for wired telegraph typing to wireless radio to transmit text. After the war, some amateur radio personnel used some retired equipment to start amateur communication.

  However, since the advent of electronic computers, the old teleprinter has withdrawn from the historical stage and been completely replaced by electronic computers.

  Connecting wireless radios through electronic computers to achieve automatic signal transmission and reception, although manual frequency searching is still required, communication efficiency and speed have been qualitatively improved.

  Oh3LUS said that with the advent of personal computers, RTTY mode has developed very rapidly.

  This was Lin Hong's first real exposure to the concept of computers.

  ====

  Lin Hong finally heard about computers ~ brothers should throw some votes to show their support?

  Update the fastest Wu Dong Qian Kun

  Complete works txt download, full text free, e-book, remember 77 reading books