Voltage series negative feedback amplifier circuit

The voltage series negative feedback amplifier circuit has good circuit stability and strong amplification capability
, and is a commonly used amplifier circuit. The voltage series negative feedback amplification
circuit is shown in the figure.
    The reference values ​​of component parameters are as follows:
    1) Transistor; VT1 and VTZ are both 3DG6.
    2) Resistor: R1=2kCl． Yes=Ra - lOkfl． RP-Rwz-
lOOkn, R4-2k,cl, Rs-lOOfl, R6-lkfl,
R7-1.5kfl. Feng-R9-lOkfl, Rio-51S1, Ru-2.7kfl,
RL-2.2kfl, Rf =3. 6kn.
    3) Capacitance: CI—G—10UF, G—G=100tiF,
c1—220t.rF.