At this time amplifier circuit based on IC KA2201, TBA820M, LM820M, and U820. You can use all ic is the series under the scheme. This amplifier circuit has a very small output power or low at 2W. Required supply voltage from 3 volts to a maximum of 16 volts.
Below is a scheme of this power amplifier
Part List
R1 = 100K
R2 = 120R
R3 = 100R
C1 = 100nF
C2 = 100uF
C3 = 470uF
C4 = 220pF
C5 = 47uF
C6 = 100uF
IC = KA2201 , LM820M , TBA820M , U820M
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