What is the function of the composite pipe?
When the composite triode is formed, the emitter of the first tube is the collector at different polarities, and the current direction must be the same as the base current of the second tubes. The polarity of the composite triode depends on the first tube. The current amplification of a composite triode is approximately equal to the product of the amplification of two tubes. When designing a circuit, it is better to choose a well integrated tube, and some have a protective circuit inside, so that the circuit is simple and reliable.
As the name suggests is to provide power tube power output, generally with the load driving circuit in the last stage, the output current is relatively large, because the production process limit, high current amplification triode tube is not large, so the composite tube for the way the magnification increases.
