Double Agent Saga

( ) 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, carefully disassembled the Yamei 1651 radio and the Hongxing 502 radio at home, and started her technical transformation work.This technical transformation work is cumbersome and boring, so I can only briefly talk about it below.

Simply put, a radio station is actually composed of two parts: a receiver and a transmitter.The function of the radio is roughly equivalent to the receiver of a radio station.But the receiving function of the radio is much worse than that of the radio station.There are two main differences. One is that the short-wave frequency of the radio is narrower, and the other is that the distortion of the received signal is relatively large.All Liu Qiuyue could do was to improve on these two aspects.

To continue briefly, Liu Qiuyue's two radios, their tuning and local oscillator circuits, use double-connected variable capacitors.A better radio, usually.In parallel with the dual variable capacitors, there is also a fixed capacitor whose value is about 20 picofarads (pf).Liu Qiuyue's first step was to remove the fixed capacitor.The purpose of doing this is to increase the receiving frequency of short-wave and receive more short-wave signals.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 simple, specific modifications, and many others such as feedback loops, basket coils, transformers, signal gain, and more.no more.

When Liu Qiuyue finally completed the transformation, it was almost 11:30 at night. [

Finally, under the silent gaze of Zuo Shaoqing and Fu Huaizhen, Liu Qiuyue carefully calibrated the direction of the direction-finding antenna with a compass so that it was facing true north, and reset the scale on the base to zero.Then she plugged in the power, turned on the radio, and put headphones on her head.They could vaguely hear the constant beeping and whistling from her earphones.Watching her keep adjusting the knob, and at the same time, constantly adjusting the direction-finding antenna.Sometimes, the trimmer capacitor on the circuit board is adjusted with a tiny screwdriver.

The room was very quiet.Closed doors and thick curtains cut out the sounds of the street.There was a pungent smell of welding oil in the room.

Zuo Shaoqing sat at the table, and Fu Huaizhen sat on the stool by 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, it was already twelve ten.

At this time, Liu Qiuyue, who was wearing headphones, seemed to be frozen, her eyes were blindfolded, she was motionless, and all her energy was concentrated in her headphones.She moved the DF antenna very slightly.

Her eyes slowly turned to Zuo Shaoqing, and said softly: "Sister, I heard the signal." But one of her fingers slowly stood up, signaling Zuo Shaoqing not to speak.

Zuo Shaoqing and Fu Huaizhen didn't even dare to breathe at this moment, they looked at her nervously.

Liu Qiuyue stared at Zuo Shaoqing, "Sister, this is a set of codes, repeated over and over again, it may be a call signal. I judge that this is a call, someone is using the radio to call."

She carefully looked 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 hands, "Yue'er, I remember, 231 degrees."

Liu Qiuyue jumped up, rushed to the Red Star 502 radio on another table, and connected the direction-finding antenna and earphones to it.She hooked up the AMI 1651 with a fixed antenna pulled from the roof.In this way, the Didi signal sound continued to be heard on the Asian American radio.She adjusted the volume to try to keep the sound out of the house.After that, she began to slowly turn the knob of the Red Star radio, slowly adjusting the direction-finding antenna.

At this time, the signal sound on the Yamei radio suddenly disappeared, leaving only a slight current sound.Both Zuo Shaoqing and Fu Huaizhen were surprised and looked at Liu Qiuyue.She continued to adjust the knob on the Red Star radio, and from time to time adjusted the angle of the DF antenna.

The room was extremely quiet at this time, with only a slight electrical sound from the Yamei radio.What's more, there are slight beeps and whistles in Liu Qiuyue's earphones.

After about a few minutes, Liu Qiuyue suddenly turned to Zuo Shaoqing, and said pleasantly, "Sister, someone responded, listen, listen." She lifted the headphones on her head to let them listen.

Even a layman like Zuo Shaoqing could hear the signal sound that followed.When the signal tone of the Asian-American radio sounded, the signal tone of the Red Star radio stopped.Similarly, when the signal of the Red Star radio is sounded, the signal of the Asian American radio will also be suspended.They seem to be two people who are asking and answering through the wire.

This wire communication lasted about 10 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 beeps on both radios stopped and disappeared.The only thing that came out of the radio was hissing electricity.

Liu Qiuyue took off her earphones and looked at Zuo Shaoqing excitedly.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, not knowing what she meant.The radio signal may indeed have been received, but what next?She has no idea. [

Liu Qiuyue looked at her, her eyes were shining brightly, her face was flushed with excitement.She jumped up and said, "Sister, just wait." When she passed by Fu Huaizhen, she pinched Fu Huaizhen's arm vigorously.

The sour scholar Fu Huaizhen cried out happily, "Mom, you abused me."

Liu Qiuyue ran to the bookcase, took out a national map that had been prepared a long time ago, unfolded it, and spread it in front of Zuo Shaoqing.He took out the angle divider, long ruler and pencil, and put them on the map.She carefully 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, isn't it?" She pointed on 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, that’s the direction.” Using a pencil, a corner divider and a long ruler, she drew a straight line from Nanjing to south-east. "Sister, did you see that there are only two big cities in this direction. 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 direction of the signal is Taipei, and the corresponding signal must come from Taipei."

Liu Qiuyue smiled, "Sister, I think so too. Let's look at another signal now." She stared at Fu Huaizhen and said, "What is the angle of Yamei?"

Fu Huaizhen stretched out a finger and said, "It's 231 degrees, there's nothing wrong with it."

Liu Qiuyue measured the angle on the map with a protractor, looked up and said: "Sister, this signal, that is, the signal to start calling, comes from the west of Nanjing, and a little south, and it is 231 degrees." A straight line is drawn on the map in a west-south direction. "Sister, do 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. It is up to you to choose which city it is. Sister, You choose one."

In fact, when Zuo Shaoqing heard her mentioning these three cities, his heart skipped a beat. The name "Wuhan" and the name "Wuhan Fifth Latent Group" jumped into her memory in an instant.

Seeing this, the officials must have guessed that the radio signal Liu Qiuyue received from Wuhan, Hubei must have been sent by the radio station that You Shaoqing stole from the Hankou Post Office.The judges will definitely feel that this incident is too coincidental.

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 radio signal mainly due to the following reasons:

First, in fact, You Shaoqing has been using the stolen radio to call Taiwan's intelligence agency for more than a day.Because after the wire contact of this group in Wuhan was interrupted, the radio station of the Intelligence Bureau stopped the wire monitoring of this group after calling continuously for a month.You Shaoqing's radio station can't get through immediately.

Second, what Zuo Shaoqing wanted to find was the wire signal sent by the hidden spy.If you monitor at night, you will most likely be able to detect it.The only coincidence is that it happened to overhear the signal from You Shaoqing.

Third, by 10,000, there were not many Taiwan spies lurking on the mainland.When the Kuomintang withdrew from the mainland, it left behind [-]+ hidden agents.But when Pan Qiwu provided Ye Gongjin with brief information on potential spies, there were only a dozen groups left.Therefore, the probability of Zuo Shaoqing receiving You Shaoqing's wire signal has been greatly increased.

Fourth, most of the wire contacts between the latent agents and the Taiwan Intelligence Agency were agreed upon.People like You Shaoqing calling for many days can only be at twelve o'clock at night.And Liu Qiuyue was born as a radio operator, so knowing some habits of wire communication in the Secrecy Bureau, the success rate is naturally higher.

However, Zuo Shaoqing didn't know that the radio signal Liu Qiuyue captured was sent by her sister.She just knew that there was indeed a latent 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 had been able to see the intelligence sent by the fifth latent team in Wuhan.She was sure that the person in charge of this group, or the main members of it, must be some deep-thinking, sharp-eyed, and experienced intelligence personnel.In those few years, she has always had indescribable respect for the Wuhan group.

Zuo Shaoqing couldn't help thinking that since the second half of last year, she had never received any information from Wuhan.For her, Wuhan, the only source of intelligence, has been cut off.

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