Classe Audio DR-3 Schematic

2.5uH

R31

L1

+V

4.7

R32

4.7
C14

47n

-V

R33

R26

0.27

Q?

MJ11016

R25

0.27

Q?

MJ11016

R24

0.27

Q?

MJ11016

R23

0.27

Q?

75

C10

4700uC11

C3

R19

R20

0.1u

10n

100

68k

Q7

MPSA56Q8MPSA56

MJ11016

R?

511

RT1

5k@25c

C8

0.1u

R22

75k

R30

R29

R28

R27

0.27

0.27

0.27

0.27

R?

200

idle

C9

curr.

30p

Q?

MJ11015

Q?

MJ11015

Q?

per il dr3b non VHC togliere 2 coppie di finali

e togliere due resistenza da 0.4 Ohm per ogni ramo

il bias si regola a 1.5v di caduta (7.5 A)

MJ11015

Q?

R34

75

C12

C13

C4

R21

4700u

0.1u

10n

100

MJ11015

Q9

MPSA06

Q10

MPSA06

1N4148D41N4148

D3

i condensatori di filtro da 30 a 20 mF

+V

F?

25A

Federico Paoletti

C?

10n

C?

C?

0.47u

C?

C?

4.7uC?4.7u

Classe’ DR3 Very High Current (VHC)

B dr3_vhc.sch

Date: February 26, 2003 Sheet of

Size Document Number REV

Title

-V

F?

25A

10n

0.47u

1N4148D21N4148

D1

R12

274

R18

274k

R13

1k

R14

R

Q4

Q2

MPS8599

1

U?

LM7812CT

3

IN

OUT

GND

C?

R11

2

10k

1500u

R?

4.99k

R?

10M

Q3

C?

R9

MPS8599

MPS8599

5u

33.2kC?

Q?

2N4341

5u

C7

C5

Q6

MPS8599

MPS8599

Q5

R?

100k

10n

C6

0.47u

100u

R10

49.9k

R?

10k

R11

100k

R17

33.2k

R16

681k

R15

1.5k

dc out offset

C?

10n

C?

30mFC?30mF

regolare bias x 1 V di caduta

su queste resistenze (=10A)

R?

0.1

MDA3502

D?

T?

RV?

VARISTOR

(4//0.4)

C?

30mFC?30mF

C?

10nC?10n

R?

C?

10n

0.1

(4//0.4)