STK403-070 | STK403-070 simplified circuit | Two channel amplifier made from old STK ic
ST Electronic ST Electronic
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 Published On Oct 17, 2023

Here is another version I made using STK 403-070. The amplifier I built in this video is a simplification of the original classic circuit. Unmute and standby. Input, output and speaker delay circuits have been simplified.

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Component list:
Resistor
2.2k x2
33k x2
3.3k x2
330Ω x2
15k x1
47k x2
100Ω 1/2w x1
10Ω x4
1.5k x1
75k x1
68k x1
0.22Ω/2w x2
0.22Ω/5w x2

Capacitor
1000pf x2
680pf x2
12pf x2
100nf x2
10nf x2
100uf x2
2.2uf x2
47uf x2
100uf/50v x4
1000uf x1

1N4007 x1
C1815 x1
Led x1
STK403-070 x1
DC12v Relay x1
3-pin screw connector x2
2pin header connector x4

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