Relais und Reverb sind in diesem Schematic nicht enthalten. Es fehlt ebenso die Erzeugung der +5 Volt, sowie die Switching-Matrix. Grau hinterlegt: Wert bzw. Schaltung fraglich. Änderungen vorbehalten!

Version 02.02 15.08.2013 1/1

Meyer Electrical Amplification - Stuttgart, Germany

k, g3

a

g1 g2

6L6 GC

f f

5 4 3

2 1

6

78

6 7

5

2

4

1

3

8 9

aI

kI

fm

12AX7A aII

kII

gII

gI

f f

7

8 3

VR9 20K-C Presence

+34V +23V

R45 1M

R74 470Ω

R41 1M

R78 10K

C23 22n

C21 100n

R39 4,7K

C50 100n

+457V

TR2

blu

3

4

8

5

R63 470Ω/2W

4

8

5

R62 470Ω/2W

Rö 4 6L6 GC

brn

+457V

+460V

3

Rö 5 6L6 GC

red

R61 1,5K

R42 220K

R43 220K

-B

+A +B

Trio

de/P

ento

de

+454V

+454V 6 1

2

+22V a C30 100n

47p

C13 22μ

C20 100n

Normal

Bright

Rö 1 12AX7A

a

Inputs

+1,3V

1

3

2

+182V

1M-A Gain

6

7

8 +1,4V

+185V

R58

47K

C31

VR2

10n

C24 39p

R53 470K

R70 10K

R35 1,5K

R26 150K C29

47n

C51 470p

R59 100K

Rel 1

C22 470p

C57 47n

R38 2,2M

R54 1,5K

C27 22μ

C14 1n

R25 150K

250K-A Clean

VR1

C54 1nF

R81 330K

C56 100p

C26 470p

R40 470K

+2,3V

1

3

2

+284V

R34 470Ω

R27 100K

R49 470K

C16 22μ

R60 10M

VR7

VR5

VR6

250K-B Treble

1M-A Bass

25K-B Middle

VR8

1M-A Master

R48 1M

C32 100p

+15V Cx

220n

R36 22K

-15V

Rx 22K

Send

Return

+D

+D

+D

8

6 4

Boost

Bugera Vintage 55 (V55) 50 Watt Guitar Combo / Head Schematic ohne Effect-Modul BDM2

FX

T8 BC546B

6

+1,3V

+200V

C28 22μ

C43 1,5n

R31 150K

C15 47n

R7182K

C49 680p

220p

22n

C46

22n C47

Rö 2 12AX7A

C48

+D

47Ω/5W

VR2

Chinch

Measure Point

-B

C39 10/100

R65 12K

Bias Supply

red

bk

-42,5VR69 5,6K

-E

Power

F 630mAT

0,1μ 275VAC

NTC ∂

Chassis

R46 100/2

R47 100/2

red

red

5AF

F2

C25 10n/1kV

6,5V≈ Rö 4, Rö 5

yel

Standby TR1 R56

390Ω/5W

+460V

4x 1N4007

yel

C11 10n/1kV

D8

D7

D6

D5

+455V

C12 22/450

+340V +320V

C10 22/450

R20 22K/5W

R23 10K/5W

C8

C9

1AF

C6 100/350

2x 220/350

R29 220K

R30 220K

R21 220K

R22 220K

F1

+C +D+B+A

C7 100/350

360V≈

or

or

C19 10n/1kV

D11

D9

D12

D10

1AF

F3

1AF

F4

1 2

3 V1 VO

GND

IC1 L7815CV

C37 2200/35

C38 2200/35

C41 10/25

C40 10/25 D18

BZX85C15

470/2

R68

R73 1K

R76 1K

C65 100/35

LED20V≈

20V≈

vio

D13

D14

D15

C36 100/63

C35 100/63

100/63

R67

5,6K

R60 1M

3x 1N4007

-76,8V

-51,4V

-25,6V

+25V +15V

-15V-25V

59

45

9

494 5

Rö 2

Rö 3

Rö 1

R24+25V

-25V

47Ω/5W

R28

20V≈

-60V

-EC34

4x 1N4007

+236V

R32 100K C17

22n R44 1,5K +224V

+340V

R37 82K

C18

Rö 3 12AX7A

+C

R57 470K

R8010K

C5310n

VR4

C3322n

10K-A Volume

Rel 1

R64 220K

R52 470K

R51 150K 7

8

R50 1,5K

Send Return

Reverb

11

9

13

2 2

7 7

Speakers

16Ω or

8Ω wht

4Ω grn

bk

Impedance Selector