 |
 |
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 |
|
 |