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Composite pipe
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Composite pipe

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There are two types of composite tubes: one is a common type composite tube, which has no protection circuit inside, such as medium and small power composite tubes below 2W. Most of these belong to this category; the other type has a protective circuit inside, and high-power composite tubes are this class.

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Detailed introduction:

A composite tube is a tube that is equipped with more than two electrode systems. Each electrode system independently passes electron flow to achieve its own function. This type of tube is called a composite tube. A composite tube is a combination of two or more triodes according to a rule, which is equivalent to a triode. The composite tube is also called a Darlington tube.

A composite tube is a combination of two or more triodes according to a rule, which is equivalent to a triode. The composite tube is also called a Darlington tube. The specific connection method is as follows. Take two triodes with the same polarity as an example. The triode collector is connected to the triode collector in the front. The triode emitter is connected to the base of the triode in the front. The base of the front transistor is the base of the Darlington, and the emitter of the rear transistor is the Darlington emitter. The usage is the same as that of the triode. The magnification is the product of the two triodes.

There are two types of composite tubes: one is a common type composite tube, which has no protection circuit inside, such as medium and small power composite tubes below 2W. Most of these belong to this category; the other type has a protective circuit inside, and high-power composite tubes are this class.