No. 66, Alfalfa Street, Qinhuai District, Zhongqinyuan, Meihua Villa.

It is an hour's walk from Purple Mountain and ten minutes' walk from Crescent Lake. It has mountains, water and city walls. It is a geomantic treasure. The housing price in the community is more than 30,000 yuan per square meter.

Bai Yang rode his bicycle quickly across the road of Alfalfa Street, jumped from under one streetlight to another, then turned left and entered the gated area of ​​the community. When he crossed the speed bump, the wheels were shaken in the air, and then he stopped heavily.

Under the surprised eyes of the security guard, he disappeared into the night and disappeared.

"You ride slower——!"

The security uncle stuck his head out and shouted.

"I know, Uncle Cai!"

He is in a hurry.

It will be half past ten for self-study next night, and it will be almost eleven o'clock when I ride home all the way. Life in the senior year of high school is always so tight. My mother requires Bai Yang to go to bed before twelve o'clock every night. If he wants to find some way to do something before going to bed,

What, then you must go home as soon as possible.

My home is in Unit 2 of Building 11. Turn left 20 meters into the community.

Eighth floor, 804.

Bai Yang parked his bicycle downstairs and locked it, then carried his schoolbag all the way up the stairs. The voice-activated lights in the corridor lit up from bottom to top the second he stepped into the unit door.

Jumping to the eighth floor in one breath, Bai Yang took out the key and opened the door. He put down his schoolbag and changed his shoes at the entrance. The light in the living room was still on, but his parents were already asleep at this time. Bai Yang glanced at their bedroom.

Sure enough, the door was closed.

The late-night snacks prepared by my mother are usually kept warm in the rice cooker, which is placed on the dining table and plugged in.

If Bai Yang comes back hungry from his evening self-study, there will be something to eat.

Late night snacks are usually noodles or rice. Bai Yang doesn't go home for dinner, so my mother will leave a separate portion of the dinner in the rice cooker to heat up.

He opened the pot and fried the noodles hot.

Bai Yang tried touching the bowl, but it wasn't too hot, so he picked up the bowl and returned to his room.

"Xiao Yang?"

As I passed my parents' bedroom, I heard my mother's confused voice through the door.

"Well, I'm back."

Bai Yang replied.

"Oh, I'm back. Go to bed early."

Mom fell asleep again, and Dad's snoring was as loud as ever.

Bai Yang returned to his room with a late-night snack. His room was not big. The entrance was through a corridor squeezed out by a single bed and the wall. The desk was against the bay window. To the right of the desk was a tall bookshelf filled with teaching aids.

Bai Yang finished his supper in three strokes, wiped his mouth, took a deep breath, took out his mobile phone from under the table and checked the time.

Half past eleven in the evening.

Bai Yang sat upright in the chair, pulled the curtains, turned on the lamp, and solemnly took out a roll of toilet paper and placed it on the table. No matter what was going to happen next, it was always right to put a roll of toilet paper first.

In the dead of night, when everything is silent, a single young man is alone. He has some crafts to do that are inconvenient to do during the day.

From now on, he will change his identity.

In addition to being a high school senior, he also has another identity——

Old color batch.

of course not.

·

·

·

It's ham.

What is ham?

Ham is HAM, the full name is: Amateur Radio.

Bai Yang reached out and peeled off the plastic sheet on the bookshelf, and with a click, the black radio station underneath was revealed.

ICOM725 shortwave radio looks a bit like an old CD player from the 1980s.

A family heirloom left behind by my father.

An antique that can go into a museum.

He leaned over and turned on the external power supply at the other end of the bookshelf, and pressed the POWER button on the radio panel. The radio began to power on. The old-fashioned light yellow LCD screen and the small level meter lit up. The channel stopped at 7.2750MHZ, and Bai Yang was on the jack.

Insert the earphones and hand microphone respectively, press the SSB button to enter the single sideband communication mode, press the TUNER button to turn on the antenna tuner, after a few seconds the tuning is completed, the green light turns on, and then slowly turn the knob to adjust the frequency.

His movements were swift and swift, and at this moment he resembled Yu Zecheng, an underground party member in "Latent".

Of course, he is also like an old man who listens to the radio with a radio before going to bed.

Tonight, Bai Yang will conduct the first long-distance communication in his ham career.

The so-called radio communication is actually to talk to someone, but the biggest difference between it and a mobile phone call is that you don’t know who you can contact, and you don’t know where the radio waves will be reflected by the ionosphere dozens of kilometers above.

, the radio station has no phone number, no operator, no optical cable across the ocean, and no one-to-one dialing - in human terms, this is a serious "talking basically depends on roaring", but the roar is modulated with radio waves

It is launched and then reflected by the ionosphere to a distance of 108,000 miles. If someone 108,000 miles away can hear your roar, then they will also roar back.

Due to limited equipment conditions, long-distance communication using shortwave is a very difficult task - in jargon, this is called expedition, abbreviated as DX QSO. Even for experienced veterans, DX failure is common.

For tonight's attempt, Bai Yang climbed up to the rooftop in the afternoon and confirmed that there was no problem with the antenna. When his father was young and frivolous, he set up two antennas on the rooftop, a six-meter antenna and a DP antenna.

I often get complaints from my neighbors.

If nothing else happens, he can contact Russian or European radio stations on the 14.195MHZ frequency band after 8:30 pm.

Then say hello to my foreign friends and tell them that I am from CHINA.

Bai Yang turned the knob and the numbers on the LCD screen jumped.

14.195 MHz.

Bai Yang listened with headphones on for half a minute, but no one spoke on the channel, so he pressed the TRANSMIT button on his microphone, and the green light on the radio panel turned on.

This is the sending status.

Bai Yang took a deep breath. As an illegal little ham who had not yet taken the B certificate and had no qualifications, he shouted out the first call in his ham career:

"CQ! CQ! CQ! This is BG4MXH, Bravo-Golf-Four-Mike-Xray-Hotel, calling cq and waiting for a call!"

His voice will be modulated into regular radio waves in the radio station, and then emitted into the air by the oscillator inside the antenna. In the brightly lit Qinhuai District of Nanjing City, it is as if someone has dropped a small stone, causing shock to the naked eye.

The invisible ripples spread in all directions at the speed of light, are reflected out of the horizon by the ionosphere fifty kilometers high, and span across large rivers and lush virgin forests, and are heard by everyone who watches this channel.

"CQ" is a common phrase in all radio communications and means SEEK YOU.

Similar to what you would say on the phone, "Is there anyone? Is there anyone? Is there anyone?"

And BG4MXH is his call sign.

The above call is translated as "Hey! Hello! Hello! This is BG4MXH! BG4MXH is looking for someone to chat! I'm waiting for your reply!"

In China, amateur radio is a strictly controlled hobby. If you want to use a radio station to communicate, you must have complete certificates. Operators need to pass an exam to obtain a license. Each legal radio station will have a unique call sign, just like people's

The ID number, the IC725 in Bai Yang’s hand, has a call sign of BG4MXH. The B letter at the beginning represents China, and the G letter represents the level of the amateur radio station. Bai Yang’s is a Level 3 station, so it is G, and the number 4 represents the region, Jiangsu.

The call signs of the areas are all 4.

Of course, there are also illegal radio stations without call signs, which are called black stations.

It's like a black householder who doesn't have a household registration.

Bai Yang’s radio station was left to him by his father. He was an old ham who had been marinated for twenty years. He once served in the Guantong Station of the North Sea Fleet and was a professional communications technician. After changing his career, he opened Didi in the city. When he was old,

My father was a powerful and serious technical leader in the Nanjing ham circle, but he finally withdrew from the industry.

In the words of my father, how can anyone still do this these days? Isn’t it nice to use WeChat for chatting?

"CQ! CQ! CQ! This is BG4MXH, Bravo-Golf-Four-Mike-Xray-Hotel, calling cq and waiting for a call!"

Bai Yang called again, then waited slightly nervously for a response.

He hoped that in a few seconds there would be another person's voice on the channel. It might be a call sign starting with J or R, from Japan or Russia.

But there was still no answer on the channel, just endless white noise.

Bai Yang was a little disappointed. What went wrong?

But this is an expected result. Problems with shortwave communication are actually normal. Any factor may lead to failure. Radio waves themselves are unstable, and the ionosphere is also unstable. Two uncertain things come together.

It would be damning to be able to get a definite result together, not to mention that the electromagnetic environment outside is becoming more and more complex, interference is everywhere in the city, and an electric car is an anti-radiation weapon for the radio station.

Either there is no one on this channel at all, so there is no response no matter how he calls.

Bai Yang took out his phone. Others had clearly said that 14195 was a vegetable market.

He found the post again.

Take a look at the time.

Damn it, 2012.

Dad is right. There are fewer and fewer people playing radio, and even fewer people playing shortwave. The only area where people are still alive is the UV band. Car enthusiasts in the city rely on this to discuss where to go on the weekend.

The time-consuming and laborious task of using shortwave radio to communicate over long distances has long since been done.

So Dad used this station as a radio.

Today in 2019, few people can feel the romance of radio communication. No one is willing to set up an antenna more than ten meters high and send their own voice to all over the world. This thing is too complicated, cumbersome and slow, even as an amateur

The hobbies are not interesting or exciting enough.

More and more old hams are withdrawing from the world, and dad is one of them.

Bai Yang increased the power from 2W to 5W and tried calling again.

Sure enough there is no one.

The channel is empty.

When Dad was young, some channels were as lively as a vegetable market. Radio waves from all over the country met in the night sky and flew to all parts of the world.

Even the people in the vegetable market are deserted now.

Bai Yang slowly turned the FM knob, and the numbers on the LCD screen changed bit by bit, from 14.195MHZ to 14.120MHZ, and then to 14.125MHZ. He wanted to try his luck, maybe someone would be talking on other channels.

?

14.126MHZ.

14.128MHZ.

14.130MHZ.

Bai Yang held his head, listened to each channel for more than ten seconds, and then turned the knob.

14.131MHZ.

14.132MHZ.

14.133MHZ.

He was a solitary traveler in the desert, and he could not see anyone of his kind anywhere he looked.

Bai Yang sighed. Tonight's communication failed. He looked at the radio station for a long time and casually dialed the FM knob of the radio station. He turned the knob this way and that, as if playing with a radio. The red TX indicator light was always on.

The numbers on the LCD screen jumped rapidly.

He was suddenly startled and his fingers stopped.

etc!

Bai Yang carefully turned the knob back slowly, frowned, and listened attentively. Among the noisy noise, someone was talking vaguely, whether he was singing or chanting sutras.

Someone!

He glanced at the channel subconsciously.

14.255MHZ.

After struggling all night, Bai Yang finally met the second person.

Still a girl.

Bai Yang waited for the other party's voice to stop and started calling: ""CQ! CQ! CQ! This is BG4MXH, Bravo-Golf-Four-Mike-Xray-Hotel! calling cq and waiting for a call!"

The channel was silent for a few seconds.

Then a surprised scream erupted from the earphones:
Chapter completed!