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Home Projects Audio Amplifier of acoustic frequencies with preamplifier

 
 

Amplifier of acoustic frequencies with preamplifier
source: Kyriakos Kontakos


 

TECHNICAL CHARACTERISTICS:

Tendency of catering: 15V

Force of expense: 4,2Wrms in the 4W

Minimal signal of entry: 94mVp-p with preamplifier, 0,65Vp-p without the preamplifier.

 

Materially:

R1

2,2KW

R2

330KW

R3

4,7KW logarithmic potentiometer

R4

330W

R5

1KW

R6

1,5W

C1, C6

100nF polyester

C2

100mF/25V ilektrolytjko's

C3, C7

1mF/25V electrolytic

C4

1000uF/25V electrolytic

C5

10uF/25V electrolytic

Q1

BC547

U1

TDA2002

LS1

Loudspeaker.

Notes:

Proportionally the resistance of loudspeaker changes the force that it can give the amplifier:

LS1

Force of expense

2W

6,5Wrms

4W

4,2Wrms

6W

3Wrms

8W

2,25Wrms

 
 

 
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