( ) At this time, Liu Qiuyue sat at the table, took a deep breath, and looked at the two radios in front of her like a Buddha. She picked up a screwdriver and carefully connected the Yamei 1651 radio and the one at home.
The Red Star 502 radio was completely disassembled and her technical transformation work began. This technical transformation work is tedious and boring, so I can only briefly talk about it below.
To put it simply, a radio station is actually composed of two parts: a receiver and a transmitter. The function of the radio is roughly equivalent to that of a radio receiver. But the receiving function of the radio is higher than that of the radio
The reception function of the radio is much worse. There are two main differences. One is that the shortwave frequency of the radio is narrower, and the other is that the distortion of the received signal is greater. All Liu Qiuyue can do is to improve from these two aspects.
Continuing to put it simply, Liu Qiuyue's two radios use double variable capacitors in their tuning and local oscillator circuits. Better radios usually do this. If they are connected in parallel with double variable capacitors, they also use double variable capacitors.
There is a fixed capacitor, its value is about 20 picofarads (pf). Liu Qiuyue’s first step is to remove this fixed capacitor. The purpose of this is to increase the shortwave receiving frequency and receive more
Shortwave signal. Liu Qiuyue’s second step is to modify the frequency range of the filter and then readjust all the trimming capacitors. The purpose of this is to improve the clarity of the signal as much as possible.
These are simply speaking, specific modifications, and there are many other contents, such as feedback loops, flower basket coils, transformers, signal gains, etc. I won’t go into details.
When Liu Qiuyue finally completed the transformation, it was almost 11:30 at night.[
Finally, with Zuo Shaoqing and Fu Huaizhen watching silently, Liu Qiuyue carefully calibrated the direction of the direction-finding antenna with a compass, making it face true north, and reset the scale on the base to zero. Then, she turned on the power and turned on the
She turned on the radio and put on headphones on her head. They could vaguely hear the ticking and whistling sounds coming from her headphones. They watched her constantly adjusting the knobs and at the same time, constantly adjusting the direction finding antenna. Sometimes
, and use a small screwdriver to adjust the trimmer capacitor on the circuit board.
The room was very quiet. The closed doors and thick curtains blocked out the sounds from the street. There was a slightly pungent smell of soldering oil in the room.
Zuo Shaoqing sat at the table and Fu Huaizhen sat on the stool at the door. They watched intently as Liu Qiuyue adjusted the band with her slender fingers. Zuo Shaoqing glanced at the alarm clock on the table and saw that the time was already twelve ten.
separated.
At this time, Liu Qiuyue, who was wearing headphones, seemed to be frozen, her eyes were dim and motionless, and all her energy was focused on her headphones. She moved the direction finding antenna extremely slightly.
She slowly turned her eyes to Zuo Shaoqing and said softly: "Sister, I heard the signal." But she slowly raised a finger to signal Zuo Shaoqing not to speak.
Zuo Shaoqing and Fu Huaizhen didn't even dare to express their anger at this time, and looked at her nervously.
Liu Qiuyue stared at Zuo Shaoqing and said, "Sister, this is a set of codes that keep repeating and repeating. It may be a call signal. I judge that this is a call. Someone is calling on the radio."
She looked carefully at the dial under the direction finding antenna and said to Fu Huaizhen: "231 degrees, you write down this number, it is the scale on the disk."
Fu Huaizhen nodded his head with his hand, "Yue'er, I remember it, it's 231 degrees."
Liu Qiuyue jumped up, rushed to the Red Star 502 radio on another table, and connected the direction finding antenna and earphones. She connected the Yamei 1651 radio to the fixed antenna pulled from the roof. In this way
, the beeping signal sound continued to come from the Yamei radio. She adjusted the volume, trying not to let the sound spread outside the house. After that, she began to slowly turn the knob of the Red Star radio and slowly adjust the direction finding antenna.
At this time, the signal sound on the Yamei radio suddenly disappeared, leaving only the slight sound of electricity. Zuo Shaoqing and Fu Huaizhen were both surprised and looked at Liu Qiuyue. She continued to adjust the knob of the Red Star radio and adjusted the direction finding antenna from time to time.
angle.
The room was extremely quiet at this time, with only the slight sound of electricity coming from the Yamei radio. Then there was the slight beeping and whistling from Liu Qiuyue's headphones.
About a few minutes later, Liu Qiuyue suddenly turned to Zuo Shaoqing and said in surprise: "Sister, someone has responded. Listen, listen." She turned on the headphones on her head and let them listen.
Even a layman like Zuo Shaoqing could hear the next signal sound. When the signal sound of the Yamei radio sounded, the signal sound of the Red Star radio stopped. Similarly, when the signal sound of the Red Star radio sounded, the signal sound of the Yamei radio
The signal will also be interrupted. They are like two people, asking and answering questions over the wire.
This wire communication lasted about ten minutes.
Liu Qiuyue said: "Sister, their communication is about to end. What they are sending now is the end code."
Sure enough, after a while, the beeping sounds on both radios stopped and disappeared. All that came out from the radios was the hissing sound of electricity.
Liu Qiuyue took off her headphones and looked at Zuo Shaoqing with excitement. She said, "Sister, my mission has been completed. I have found the signal. Now it's up to you."
Zuo Shaoqing was at a loss and didn't know what she meant. The wire signal might have been received, but what should she do next? She had no idea.[
Liu Qiuyue looked at her, her eyes sparkling and her face flushed with excitement. She jumped up and said, "Sister, wait." When she passed Fu Huaizhen, she pinched him hard on the arm.
Bundle.
Fu Huaizhen, a sour scholar, shouted happily, "Mom, you are abusing me."
Liu Qiuyue ran to the bookcase, took out a national map that she had prepared a long time ago, unfolded it, and spread it in front of Zuo Shaoqing. She also took out a protractor, a long ruler and a pencil and placed them on the map. She looked at it carefully.
He looked at the scale below the direction-finding antenna connected to the Red Star radio, then pointed at the map with a pencil and began to explain to Zuo Shaoqing.
"Sister, our current location is Nanjing, right?" She pointed at Nanjing with a pencil, "Just now, the signal received by this Red Star radio came from the south, a little east. According to the angle measured by the direction finding antenna, it is
174 degrees is this direction." She used a pencil, a protractor and a long ruler to draw a straight line starting from Nanjing and heading south-east. "Sister, did you see that in this direction, there are only two big ones?
Cities. I can only choose big cities. One is Hangzhou, and the other is Taipei."
Zuo Shaoqing looked at the map, then looked up at Liu Qiuyue. She immediately understood the meaning, "I believe that the signal direction is Taipei, and the responding signal must come from Taipei."
Liu Qiuyue smiled, "Sister, I think so too. Now let's look at another signal," she glared at Fu Huaizhen and said, "What's Yamei's angle?"
Fu Huaizhen held out a finger and said, "It's 231 degrees. It's not wrong."
Liu Qiuyue used a protractor to measure the angle on the map, raised her head and said, "Sister, this signal, which is the signal to start calling, comes from the west of Nanjing and a little south, and it is 231 degrees." She used a ruler to measure the angle.
A straight line was drawn west-south on the map. "Sister, did you see that there are three big cities in this direction, namely Hefei, Wuhan and Chongqing. This call signal may come from one of these three cities. What exactly is it?
It's up to you to choose which city. Sister, you choose one."
In fact, when Zuo Shaoqing heard her mention these three cities, her heart skipped an electric shock. The name "Wuhan" and the name "Wuhan Fifth Latent Group" both jumped into her memory instantly.
.
When the readers saw this, they must have guessed that the radio signal from Wuhan, Hubei received by Liu Qiuyue must have been sent by the radio station that You Shaoqing stole from the Hankou Post and Telecommunications Bureau. The readers must have felt that,
What a coincidence.
In fact, although it is a coincidence, it is not too coincidental. There is a reason for this.
Liu Qiuyue was able to capture You Shaoqing's wire signal mainly for the following reasons:
First, in fact, You Shaoqing used a stolen radio station to call the Taiwan Intelligence Bureau for more than a day. After the Wuhan group's line contact was interrupted, the Intelligence Bureau's radio station stopped calling the group after a month of continuous calls.
Line monitoring. You Shaoqing's radio station cannot be connected with one call.
Second, what Zuo Shaoqing wants to find is the wire signal sent by the latent spy. If you monitor it at night, you are very likely to pick it up. The only coincidence is that you happen to pick up the signal sent by You Shaoqing.
Third, by 1957, there were really not many spies lurking in the mainland in Taiwan. When the Kuomintang withdrew from the mainland, it left behind hundreds of thousands of lurking spies. But when Pan Qiwu provided Ye Gongjin with brief information on the lurking spies,
There are only a dozen groups left. Therefore, the probability of Zuo Shaoqing receiving the right Shaoqing's wire signal is greatly increased.
Fourth, most of the wire communications between latent agents and the Taiwan Intelligence Bureau are at agreed contact times. Calls like You Shaoqing's for many consecutive days can only be made at twelve o'clock at night. And Liu Qiuyue is a telegraph operator.
, if you know some habits of wire and telephone communication with the Security Bureau, the success rate will naturally be higher.
However, Zuo Shaoqing did not know that the wire signal captured by Liu Qiuyue was sent by her sister. She only knew that there was indeed a lurking group in Wuhan.
However, in her memory, the fifth latent group in Wuhan was only active until the first half of last year. Because before that, she could always see the intelligence sent by the fifth latent group in Wuhan. She was convinced that the person responsible for this group
Those people, or the main members among them, must be some intelligence personnel with deep thinking, keen eyesight and rich experience. During those years, she had always had indescribable respect for this group in Wuhan.
Zuo Shaoqing couldn't help but think that since the second half of last year, she had never received any intelligence from Wuhan. For her, Wuhan, the only source of intelligence, had been discontinued.
