Novel Gallstone Hybrid Power Amplifier 02

The gallstone hybrid power amplifier introduced in this article is novel and practical, with superior performance. Its unique feature is that the tube anode voltage and
the transistor front-stage voltage stage are combined into a group, which simplifies the circuit and reduces the cost of the whole machine. The circuit is shown in Figure 2- The complete machine shown in Figure 12
    consists of five parts: input stage, tone control stage, voltage driver, power amplifier output stage and power supply. It uses
three active devices: electron tube, voltage driver module and complementary Darlington pair tube circuit. The schematic diagram is shown in Figure 2-13.
    The electron tube uses 6N11, which is a medium-tu high-frequency voltage amplifying double triode. It was originally used in the high-frequency circuit of tube TVs
, but now it has become a popular audio tube. It is characterized by high conversion rate, clear and lively tone, and rich layering.