Tube life, what is the general lifespan of a tube

According to its different uses, electron tubes can be divided into voltage amplification tubes, power tubes, inflatable tubes, thyristor tubes, ignition tubes, mixing or frequency conversion tubes, rectifier tubes, oscillating tubes, detector tubes, tuning finger tubes, voltage stabilizing tubes, etc.

2) Classification according to the number of electrodes.

According to the number of electrons, electron tubes can be divided into voltage amplification tubes, triodes, quadrulodes, pentodes, hexodes, heptunes, eight transistors, nine transistors and composite tubes. Tubes with more than three poles are also called multi-transistors or multi-gatees.

3) Classification by appearance.

According to its shape and shell material, electron tubes can be divided into bottle-shaped glass tubes (ST tubes), "acorn" tubes, cylindrical glass tubes (GT tubes), large glass tubes (G-type tubes), metal porcelain tubes, small tubes (also known as peanut tubes or finger-shaped tubes, MT tubes), tower-shaped tubes, ultra-small tubes (pencil-shaped tubes) and so on.

4) Classification according to internal structure.

According to its internal structure, the electron tube can be divided into single diode, diode, double diode, double diode electrode, single triode, power pentode, beam quadrude, beam pentade, double monode, two-pole five-pole composite tube, beam quadrude, three-pole-five-pole composite tube, three-pole-hexapole composite tube, three-pole-seven-pole composite tube, beam power chamber and other types.

5) Classification according to the heating method of the cathode.

According to the heating method of the cathode, the electron tube can be divided into direct heating cathode electron tube (the current passes directly through the cathode to make it reach the state of thermal electron emission) and the side-heating cathode electron tube (the cathode is heated by the filament next to the cathode).

6) Classification according to shielding method.

According to the shielding method, the electron tube can be divided into sharp cut-off shielded tube and remote cut-off shielded tube.

7) Classification according to cooling method.

Electron tubes can be divided into water-cooled tubes, air-cooled tubes, and naturally cooled tubes according to the cooling method.

Dizzy. It's hard.

The theoretical value is mostly 1000 hours.

It's about the same as a normal light bulb.

But when used on the radio, many can be more than twenty years old.

That is, the life of the filament, the imported one is much longer, and the domestic product is 3000 hours, and it is too much to be able to change it 3 times in a lifetime.

Hello dear dear, it is a pleasure to serve you: the general service life of the tube is not less than 1000 hours. Usually the tube design service life is not less than 1000 hours, which is a very conservative number.

The life of an electron tube has a significant bearing on the conditions of use. In order to pursue high power and large dynamics, some burners use the tube overvoltage, and the screen consumption is almost at the limit, so the life of the tube will be greatly reduced. If used according to the data given in the manual, it will not deteriorate seriously for more than 5,000 hours.

Electron tube is one of the earliest electrical signal amplifier devices. The electron emission part of the cathode, the control gate, the acceleration gate, and the anode (screen electrode) lead that are enclosed in a glass container (usually a glass tube) are welded to the tube base. The electric field is used to inject an electronic modulation signal into the control gate in a vacuum, and the signal data of different parameters after amplification or feedback oscillation of the signal are obtained at the anode.

In recent years, it has been gradually replaced by amplifiers and integrated circuits made of semiconductor materials, but at present, in some high-fidelity audio equipment, low-noise, high-stability coefficient electron tubes are still used as audio power amplifier devices (Hong Kong people call the use of tube power amplifiers "gall machines"). Thank you for your trust, the above is my reply, I hope it can help you, I wish you a happy life.

Hello:——Tube power amplifierThe service life depends on the life of the tube filament and the effective emitting substance of the cathode, in general, 2 hours per day, not less than 10 years. [The basic condition is that the rated voltage of the power supply is stable].