Circuit schematic above is / include power amplifiers that have low power output. 1 Watt output power is only based on the IC , and ic used LM390 , manufactered by NS and ic packaged in DIP-14. For output impedance have 4 OHm. Requires a minimum voltage 4 Volt and Maximum voltage is only 9Volt.
Resistor
R1________33K
R2________510R
R3________510R
R4________2.7R
Capacitor
C1________100uF 16V
C2________100uF 16V
C3________10uF 16V
C4________220uF 35V
C5________10uF 16V
C6________100n
IC
IC1_______LM390
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