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  Chapter 7: The Voice from the Capital (Part 2) "This is BY4BU calling CQ and waiting for a response..."

  The same call came from the loudspeaker again, it was a man's voice.

  Lin Hong felt extremely surprised in the face of this situation.

  What's going on? It seems like someone is constantly calling out from inside?

  Lin Hong's mind suddenly flashed a movie clip. It was more than a year ago, a film projection team came to the village and showed an anti-Japanese war movie in the field in front of the village head's house at night. At that time, Lin Hong was sitting on his father's shoulders watching it, he vaguely remembered that there was a device with long antennae on the soldiers' backs in the movie, they used that device to contact their companions.

  Yes, the device they used is called a wireless telegraph!

  Lin Hong suddenly remembered everything.

  This memory is a bit fuzzy because it's been too long, and at that time, his brain wasn't very useful, somewhat dazed and confused, and his memory wasn't as good as it is now. q, here is by4bu calling cq and waiting for an answer...

  The other side kept repeating such words, as if they would not stop until their goal was achieved.

  But that voice seemed to have a special magic, Lin Hong felt that his heart was stirring, always with an impulse, wanting to respond.

  How should I answer?

  Lin Hong's gaze swept back and forth over the equipment in front of him.

  At this time, he saw an elliptical thing hanging on the panel in front of him, with a wire connected to the tail and plugged into the inside of the radio.

  This should be the place to speak.

  Lin Hong looked towards the door with a hint of nervousness, but ultimately couldn't hold back, grasped the microphone, and with a trembling voice, weakly said: "This is BY4BU calling CQ and waiting for a response..."

  The other side is still calling out tirelessly like this.

  Lin Hong added a few words, but the other party seemed to have not heard them at all.

  Is there a button here?

  Lin Hong only then discovered that next to the microphone was a button. He immediately understood that when speaking, he should press this down.

  He pressed the button again and mustered up his courage to say: "Hello... okay..."

  After he finished saying this sentence, the other party's constant shouting finally subsided and did not come out again for a long time.

  Lin Hong's face showed disappointment, and just as he was about to hang the receiver back in its place, the voice from the speaker came on again:

  "Good, little friend, nice to establish a conversation..."

  The other party actually replied!

  Lin Hong's heart was racing, his blood rushed to his head, and his face turned bright red.

  The experience of talking to others directly through the radio made him feel extremely strange. He had heard his teacher say before that in a neighboring village, there was a telephone that could communicate with people thousands of miles away as if face-to-face, and it seemed similar to this.

  He was so excited that he couldn't speak for half a day under the shock of his emotions.

  "Shasha... little friend, how old are you?" the other party asked proactively.

  "I... I'm eight years old." Lin Hong finally replied.

  "Wow... at eight years old, she can already use a radio, that's amazing... when I was eight years old, I didn't know anything..."

  "Uncle... where are we?"

  "Shasha... I'm in Beijing, does Beijing know? It's where Chairman Mao is... Shasha..."

  He actually went to Beijing?!

  Lin Hong was completely stunned.

  Beijing, where Chairman Mao is located.

  In his impression, Beijing was a very far and remote city, just like the stars in the sky, belonging to something that could be seen but not reached.

  The teacher had once said that it would take at least several days and nights by train to get from Dongling City to Beijing. But now, he was actually having a direct conversation with an uncle in Beijing, which left him utterly shocked.

  "Shhh... little friend, work hard and study well, grow up and come to Beijing for college, here..."

  The other party was saying, "Shh", when suddenly a loud rustling sound grew louder and covered up the other party's voice.

  "Hey, uncle, are you there?"

  Lin Hong hurriedly called out a few sentences, but the speaker was still filled with "rustling" sounds, and he couldn't hear any voice at all. He completely lost contact with the other party.

  Looking at so many knobs on the panel, Lin Hong didn't dare to operate it with his hands because he didn't understand anything and was afraid of damaging the radio.

  He reluctantly hung up the receiver and left Old Xu's room.

  Lin Hong reluctantly bid farewell to the two old men playing chess outside and headed home.

  After returning to his own room, he lay on the bed, and his mood took a long time to calm down.

  The experience just now gave him an unprecedented spiritual shock, he had never thought that through the radio, he could actually establish contact with people far away in Beijing, and it felt like face-to-face conversation.

  Although he had heard similar scenes from his teacher's mouth, at that time he didn't have any feeling at all, thinking that such a situation was too far away from himself and treated it as a mythological story to listen to, but today he truly felt the infinite charm of wireless.

  Imperial City...

  Mom seems to be in Beijing.

  His mind conjured up his mother's photo, with a deep longing in his eyes.

  If I also had a radio like this, could I also talk to mom like this?

  Thinking of this, Lin Hong immediately got up and took out the radio that his father had smashed from under the bed "treasure box", then took out a small knife from the box.

  He formally started making a "stone radio" and the necessary components were directly taken from this small radio.

  He was very clear in his mind that the "crystal radio" was just a simple radio, and it was impossible to compare with Old Xu's "wireless telegraph". However, he still knew very little about wireless telegraphy at present, and he had to start from scratch step by step. Only then would he have the possibility of finally making his own "wireless telegraph" like Old Xu.

  The early detector was made directly from natural minerals, and the detector is an important component in a radio receiver. Based on this principle, the existence of "crystal radios" became possible.

  A simple crystal radio consists of five main parts: a coil, a variable capacitor, a detector, headphones and an antenna.

  The radio in Lin Hong's hand can directly extract some components from it, after all, he only has this thing in his hand, other things either need to be made by himself or bought or picked up from outside.

  After extracting a few components from inside, he came to his father's room, found a bundle of insulating tape from a large trunk, and then found a beer bottle that his father had thrown into the yard, starting to wind the insulating tape around the beer bottle in circles.

  ……

  Lin Hong's hands-on ability is very strong, but the "stone radio" will not be completed for a while, mainly because there is no main component "detector".

  According to the magazine, the detector can be made with a mineral and metal probe, or replaced with a 2AP9 type diode, but the sensitivity of the diode is not as good as that of natural minerals.

  Lin Hong didn't have either of these two things, but he finally decided not to use a diode as a substitute because the book mentioned that diodes are relatively expensive and not something he can afford at present.

  He prepared the main components, Lin Honghuai took out the 50 cents he had been hiding and went out. He knew that an old Chinese doctor in the village had something called "green mineral" for sale. He remembered that his teacher had said during a nature class that some natural minerals could be used as medicine. Moreover, he had seen it with his own eyes at the old Chinese doctor's place.

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