I started with a ship full of max-level veterans, and I'm just a complete noob.

the other side.

During the 36th hour of the aging test, the light bulbs in Workshop No. 1 were changed twice. The astringent smell of rosin solder after it cooled was trapped in the air. In the enamel mug next to the workbench, the cooled corn paste had a slightly sour taste.

The five Type B tubes glowed a dark red on the test stand, and the microammeter pointer was fixed at 284, without any deviation.

Jiang Ming sat on a low stool, with an urgent telegram from the Northwest spread out in front of him. The grayed-out lead type pressed the chill of the front lines into the paper.

The Type 01 is rendered obsolete, the Type 02's degradation accelerates, and the enemy's radio transmission interval is shortened to fifteen seconds. If the direction finding accuracy cannot be reduced to within one degree within forty-eight hours, the area-locking operation will lose its window of opportunity.

He folded the telegram and placed it under his notebook, then got up and walked to a corner of the workshop. He leaned against the cold brick wall, closed his eyes, and let his consciousness sink into "The Record of Human Connections".

The bronze cover opened in his mind, and the golden name cards appeared vertically. Jiang Ming selected the name card of the early pioneers of vacuum tube and radar physics and activated the historical fragment search.

[Historical fragment query initiated, consuming the first psychic summoning quota of the day, four quotas remaining.]

The yellowish screen unfolds, showing a radar station on the southeast coast of England in 1943. A high-powered German pulse jammer turns the warning screen into snow. A technical officer in a gray-green uniform squats next to the receiver terminal, connecting two coaxial cables of different lengths to the mixer.

The longer cable creates a phase delay, and the interference signal is reversed at the mixing node, causing the weak echo that was drowned out by noise to resurface on the oscilloscope.

Dual-ring active cancellation, passive phase delay line.

The fragments of that pioneer's consciousness contain the conversion relationship between cable length and interference frequency, as well as the formula for compensating for phase difference using adjustable capacitors.

When Jiang Ming opened his eyes, sweat was sticking his work clothes to the brick wall on his back. He returned to the workbench, took out a pencil and half a stack of scrap paper from the metal cabinet, and started writing without stopping.

The length difference between the two coaxial cables depends on the enemy's pulse parameters, the three short pulses followed by one long pulse followed by three short pulses at fifteen-second intervals, the pulse width of 0.3 seconds, the center frequency, and the bandwidth are all recorded in Chen Zhiyuan's test records.

He drew a structural diagram, with two parallel coaxial lines leading out from the receiving antenna end. The long line is wound into a fixed loop at the end and connected to an adjustable point made from recycled mica capacitors, and then fed into the mixer input.

The materials were not demanding; spare coaxial cables from Soviet-made communication equipment and adjustable capacitors from scrapped transceivers could all be salvaged from the front lines.

Da Liu entered the room carrying an aluminum lunchbox and saw Jiang Ming squatting in front of the table drawing. The lunchbox was placed on the corner of the table, and the man did not say a word.

After Jiang Ming finished drawing the last marking line, he folded the scrap paper in half, stuffed it into a blank kraft paper envelope, and handed it to Da Liu.

"Da Liu, immediately send a confidential telegram to Chen Zhiyuan at the Northwest Base, sending the delay line blueprints."

He tapped the cover with his fingertip and added a sentence.

"Tell him to use two coaxial cables of unequal lengths to create a phase difference, which will cancel out enemy pulse interference at the receiving end. The cable length should be calculated according to the parameters he recorded. The formula is on the back of the drawing."

Da Liu took the envelope, turned around and left. His cotton shoes brushed against the cement floor. After the iron door closed, only the low-frequency vibration of the vacuum pump and the hum of the current from the five pipes remained in the workshop.

Jiang Ming sat back down on the low stool, took out the telegram from the Northwest, glanced at it, and then put it back under his notebook.

The delay line can only buy time for the front line; what really needs to be sent over are these five pipes.

……

On the 150th hour of the aging test, the snow outside the workshop had partially melted, but it froze again overnight, forming icicles of varying lengths under the eaves.

Xiao Zhao rubbed his red eyes, opened his notebook, and held the pen tip in front of the micro-safety meter next to the No. 3 pipe station, then suddenly stopped.

"Jiang, pipe number three has fallen."

Jiang Ming closed the notebook and walked over. The microammeter pointer had moved away from 284 and was slowly hovering between 281 and 282.

Xiao Zhao flipped back to the previous page, pressing his index finger against the three most recent lines of data.

"Hour 146, 284; Hour 148, 283; Now, 281."

Old Sun walked to the side, wiped his palm on the seam of his work pants, and said nothing.

If the voltage drops by three microamps in four hours, it might be manageable if the voltage decays linearly. The real concern is that the coating may have already suffered structural damage, and the next step could be a sharp drop.

Jiang Ming looked at Xiao Zhao.

"The other four."

After running around to four workstations, Xiao Zhao returned with a slightly calmer expression.

"01, 02, 04, and 05 are all stable at 284, only 03 is dropping."

Jiang Ming stood in front of workstation number three, ran the back of his hand over the outer wall of the tube shell, and checked the anode voltmeter and filament current. The power supply end readings remained unchanged.

"There are no problems externally."

He took a half step back, staring at the dark red light that began to fluctuate inside the shell of tube number 03.

"Check the coating."

Old Sun's fist landed on his own thigh, the dull thud half-swallowed by the noise of the workshop.

"I was on duty during the stepped sintering process, and the temperature curve didn't deviate by even half a step."

Jiang Ming didn't reply. He turned around and went back to the corner, leaned against the brick wall, closed his eyes, and his consciousness sank into the Tongtian Record again, selecting the name card of the female pioneer in precision instrument and vacuum system engineering.

[Spiritual dialogue initiated, consuming the third quota for today, two quotas remaining, time limit of thirty minutes.]

He mentally recited all the data for tube No. 3, including preparation parameters, sintering curve, aging time, decay amplitude, and rate.

The female pioneer remained silent for a few seconds before speaking, hitting the nail on the head.

"The sintering curve is correct; the problem lies before the coating forms."

"How is anhydrous acetone treated when used as the electrophoresis suspension?"

Jiang Ming quickly recalled the process: quicklime was dehydrated, redistilled, and the pH was titrated to 4.8.

The female pioneer pressed for answers.

What type of water should be used to dilute nitric acid?

Jiang Ming's train of thought faltered at this point.

The distilled water produced by the simple Soviet-made distiller in the factory.

"Ordinary stills do not have ion traps. Vigorous boiling will carry calcium, magnesium and iron ions into the steam as aerosols, which will remain in the water after condensation."

"Impurity concentration is not detectable at room temperature, but in a high-temperature electric field of more than 150 hours, it will migrate along the gaps between coating grains to the nickel substrate interface, forming localized conductive hot spots, and ablation begins from there."

When Jiang Ming exited the psychic state, the sweat on the back of his neck slid down his back and was caught by the collar of his work clothes.

He returned to workstation number three, opened the electrophoresis preparation page of his notebook, and saw that the source of water for dilute nitric acid preparation was listed as distilled water from the workshop.

"The water is not clean."

Jiang Ming closed the notebook and put it back on the table.

"The suspension is prepared with water containing soluble salts, and the concentration is so low that it cannot be detected in the factory test. The high temperature electric field for a long time will force the impurities to the coating interface and burn out conductive points."

Xiao Zhao's lips were dry as he glanced at the other four tubes.

"Are there also potential risks in the same batch of suspensions, 01, 02, 04, and 05?"

"have."

Jiang Ming raised his hand to stop him from saying the rest of his sentence.

"The coating thickness has a deviation of plus or minus 0.28 micrometers. 0.3 micrometers is at the thinner end, so it falls off first, and the other four just fall off a little later."

Old Sun stood up from the low stool, his Adam's apple bobbing.

"Little Ginger, we've already steamed it three times, how much cleaner can it be?"

Jiang Ming looked at the dark red, shimmering tube at workstation number three. The three scabs on the back of his right hand, which were about to fall off, were irritated by his sleeve. He didn't touch them, but instead turned his gaze back to Lao Sun's face.

"Ordinary distillation is not enough, so we use ion exchange to rub a column of deionized water by hand."