Three waves of rocket strikes, a hundred white cavalry only left less than twenty people who ran at the front. The mutilated limbs of men and horses were scattered everywhere, mixed among the guns and scraps of cloth. The entire area was ploughed again and again, and the bomb craters were dotted with the dirt mixed with the flesh and blood of men and horses, and the grass and trees that were once covered with dead grass were gone.

Chomba heard the continuous explosions behind him, but it was impossible to look back, he was so close to the enemy wall that he could even see the shooter on the wall hooking the trigger.

Boom, another shell fell, hitting the wall quite accurately, and the broken stake was thrown into the air along with the enemy's body.

"Kill!"

The people around shouted frantically and rushed into the trench with rifles loaded with bayonets. Chomba did not rush into the ditch with him, lying on his stomach outside the edge of the ditch and shooting non-stop. He doesn't need to aim, he doesn't even need to hit, it's enough to prove that he's still shooting. As long as you don't get hit by bullets, whether it's the enemy or the officer.

The soldier, who had just reloaded, calmly picked up his gun and pulled the trigger, and the bullet went into the chest of the person in front. More people rushed up from behind, bayonets flashing cold, and they jumped into the trenches. The soldier threw down his rifle and pulled out the pistol at his waist, and the moment the gun rang out, the bayonet pierced his body at the same time. Struggling, the soldier tried to use his last strength to pull down the hammer again, but a new bayonet stabbed again.

Another soldier, struck by a bullet, struggled to strike a match, lit the fuse under the astonished gaze of the enemy, and then a violent explosion rang out in the trench.

In the face of the surging crowd, the soldiers in the trenches did not flinch and fought until the last moment of their lives, firing bullets from the chambers of their guns and stabbing bayonets with their last strength.

Liang Hong saw the scenes under the wall very clearly. The enemy poured into the trenches like a tidal wave, engulfing twenty soldiers in an instant. The soldiers were very valiant, and the absolute disparity between Zhong and the widow was so great that they shed the last drop of blood. His eyes were moist, and his ears seemed to hear the rumbling of cannons and the continuous and intensive fire of automatic weapons, and he survived, but his comrades were asleep.

Shooting, pulling the bolt, shooting again, and running out all the bullets in the magazine like crazy, he finally came to his senses. Already enemies have climbed out of the trenches, trying to climb the wooden walls.

"Throw the dynamite pack!"

Roaring and giving orders.

Dozens of burning pill packets were thrown from the fence, causing a riot in the crowd. The trench became a place of slaughter for human flesh, and everywhere there were flashing explosions, splattering flesh and blood, and limb flying into the air. The soldiers of the expeditionary force, who had just bravely jumped in, had completely lost their courage, turned back, and fled out of the trench, no matter how much the white officers could suppress them.

Barron hung his arms helplessly, he no longer had the courage to look at the collapsed battlefield.

It's over, and he gives the last order in despair.

"Gather your troops and retreat."

It seems that everyone around is sneering and not laughing. He felt that life was boring, and pulled out his pistol for self-defense.

"Lieutenant Colonel, there are many things we didn't expect."

The artillery officer couldn't bear to comfort him, but it made Barron's eyes light up. Yes, it's not that we're too incompetent, it's that the enemy is unexpectedly too cunning. If you can't think of it, think about it in another way, maybe there is a new life waiting for him.

I unconsciously looked at the sky to the east, yes, the east is a Portuguese colony, I am still a soldier, and I have the skills to fight.

"Go back and tell Rhodes, and say Barron is dead."

With that, he mounted his horse and galloped eastward.

On 18 April, the Barron expeditionary force suffered a crushing defeat at the North Transvaal, recapturing less than 200 men. Liang Hong's side also suffered a lot of losses, with nearly 100 soldiers killed and wounded, and many buildings in the base were damaged.

Liang Hong estimated that it would not be long before the battle spread. The victory of the natives over the white army ended up enough to attract the attention of the Transvaal and even the whole of southern Africa. The next enemy will be even stronger, so you have to increase your strength. After simply arranging the production and reconstruction of the base, he quietly left.

Two days later, on the road north of Johannesburg, several fast horses galloped in. Liang Hong took two white warriors, one man and two horses, day and night, and he had to do what needed to be done before the information came out - to complete the last condition for upgrading the base.

Brian was a little surprised to see Liang Hong, he didn't expect to come back so soon, and brought him the first investment of eight hundred pounds. After the last point, Brian modified the design of the transmitter and added a detector circuit, but the detector element was very rough. The so-called powder detector is a pile of metal scraps on the glass plate, and the glass plate is gently knocked by hand to control the resistance of the detector.

"Brian, is there a factory in Johannesburg that makes light bulbs?" Liang Hong asked.

"Light bulbs?" Brian asked rhetorically, he didn't know what Liang Hong was going to do, "Yes, there is one not far from here." That thing has a very short lifespan, and it won't take long for it to break. ”

What Liang Hong has to do is to build vacuum tubes, diodes and transistors. In the past, when inert gas was not used, the light bulb factory blew out the glass bulb, and usually the inside of the bulb was pumped into a vacuum to prolong the life of the filament, so naturally there was the technology and experience of vacuuming. In addition, he also likes the tungsten wire in the bulb, which has a very high melting point and can withstand long-term energization, making it a good gate material.

However, after listening to Brian's explanation of today's light bulb industry, Liang Hong realized that the so-called Edison's invention of the tungsten light bulb was a lie, and there is no such thing yet. However, there are no tungsten light bulbs, and there are still tungsten metals, but the price is very high, and they are all things made in the laboratory. The popularization and application of tungsten metal in the electron tube industry will wait until the powder metallurgy technology is mature, so the products of each era are likely not to be isolated, but to be matched with other technologies of the same era.

Liang Hong has studied electronics and knows the basic principles of electron tubes. The three most basic poles, the cathode, release a stream of electrons, and when the filament heats the metal plate, the electrons are freed out and scattered in the vacuum glass bottle. The screen pole is the outermost metal plate of the tube that connects a positive voltage to attract electrons emitted from the cathode. The thin coil of the gate, like a fence, is fixed between the cathode and the screen, and the electron flow must pass through the gate and then to the screen. The voltage between the gates can control the flow of electrons, and it has the function of flow and blocking, just like a faucet. After adding a vacuum transistor, the detection circuit is sensitive and can integrate the three functions of detection, amplification and oscillation.

Ten vacuum transistors were made in one go in the light bulb factory, and the material cost alone cost more than 20 pounds. Each vacuum triode looks like a big light bulb. Although this thing is not beautiful in appearance, Liang Hong knows that with it, he can make high-efficiency amplification circuits, and make easy-to-carry transmitters and receivers.

Another improvement is the antenna. Marconi used a T-shaped antenna, while Brian initially used a linear antenna, and the improved solution was an umbrella antenna. According to the most advanced theories of this era, the longer the wavelength, the less attenuation in propagation, and the wavelengths used to achieve long-distance communication are more than 1,000 meters. Due to structural height limitations, these antennas are much smaller in size than wavelengths, and antennas do not match wavelengths. With the knowledge of later generations, Liang Hong knew that short waves could also travel long distances, so he used short bands and Yagi antennas.

The Yagi antenna, which looks like a king-shaped antenna for a drying rack, was invented by Japan's Yagi Shuji in 1925, and has good directionality, and the effect of using it for direction finding and long-distance communication is particularly good. If it is equipped with elevation and azimuth rotation controls, it can communicate with radio stations in all directions, including spacecraft, as it likes. The antenna is small in size and easy to fabricate, but it is quite complex to design, and it takes a lot of calculations to match the wavelength and oscillator. Liang Hong directly applied his homework when he was studying radio at the Artillery Academy, the 10-meter wavelength scheme.

After three days of busy work, two sets of spark transmitters and receivers were finally produced.

Despite the curious Brian's repeated questions, Liang Hong simply coped with it, saying that he was ready to try his luck. He couldn't explain this design, and the theoretical system in it was beyond his contemporaries. Only left a set of devices before leaving, which was used for Brian to figure out how much he could understand, completely relying on his own perception