STEELPHON "PIONEER" - Bricolage Online

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30Vac. 300Vac. STEELPHON "PIONEER". Italian Vintage Amplifier. Redrawn from original schematic by Valmer. MAIN. AUX. SUPPLY. 11/01/2010. 4ohm. 8ohm.
C18 10nF

C21

7

V5-2 ECC83

2

R68 2.2M 8

7

1

R50

V4-1

F2

100k

F1 F2

R51 270k

V4-2

REV 1

POWER

ECC83

4

F1 F2 F1 F2

+

+ R74 10M

R49 C20

R47

R77 PHOTORES

C37

1M

25uF

D2

R52 270k

10k 47nF

D3

R36

R37

R39

1M

1.5k

100k

C17 +

R40 5

C46a 4700pF

C45b 4700pF

C46b 4700pF

+HV2

V7

270

C45a 4700pF

8

R43

REVERB

R29

9 2

1.5k

470

25uF

EL84 3

25uF

D

2

1k

R67 2.7k C33

11/01/2010

3 8

100k

F1 F2

P9

Rev. 1.2

Redrawn from original schematic by Valmer

C47 10nF

Reverb

R42

ECL86

ECL86 R46

STEELPHON "PIONEER"

R44 100k

C16 100nF V3-2

V3-1

1

Italian Vintage Amplifier

REVERB

3.6k/5W

C15 10nF

47pF

8uF 350V

3 F1

R41

C10

ECC83

+

LP1 LAMP R71 R69 100k 1M

F1F2

C19 150pF

8

ECC83

R38 100k

6

R48 100k

C36 10nF

V5-1

+

10k

1

D

R75 2.2M

C35 33nF

6

C34 22nF

BEND

R45

+HV4

1

R73 10M

+HVRev

2

R53 12k

C22 8uF/500V

2

R70 270k

+HV4

+HV3

3

3

VIBRATO

4

6

+HV3

5

7

+HV3

6

7

7

9

8

F1

Depth

F2

T2

7

Speed

3

-Bias

Remote

R76 2.2M

2

C12 100nF

R20 100k

9

C25

1 220k

F1

F2

C1

R2 1M

+

33nF P6

P4 C3

220k

1.5k

C6

R11

25uF

1.5k

R14 470

C24 330pF

SW2 C32 10nF

R62 100k

R66 220k

6

C39

220k

R63

ECC83 R57 68k

33nF F1

R56 1M

C27 25uF

+

1M

R58

F2

P1

R82

10k/1W

3.3k/2W 320Vdc 350Vdc

220k

22nF

R61

R84 1.5k/5W

1M

25uF

10k

Bass 7

+

+

50uF/500V

White +HVRev F1 F2

C33

1.5k

C40

+

PHONEJACK C44 2x50uF/500V

+

270Vdc

R65 1.5k

C23

R78

R79

R80

330/2W

1.5k/5W

1.5k/5W

T1

0.5T DB1 4xBY250

300Vac

R85 5.6/2W D1

TR2

300

C43

100uF

100uF

F1

4

3

1.2T J6 A

AC

6.3Vac Line Trafo

5

F1

280 220 160 145 125 110

LP1 LAMP

F1

Volume 6

SW8 SELVOLT

30Vac

BY114

R86 330

C42

+

SUPPLY

SW6 STAND BY

F2

C41 2x50uF/500V

Black -Bias -25Vdc

50uF/500V

8

J5 2 1 3 4

ECC83 R64 1k

P3

C29

50uF/500V

V1-2

3

1 2 3

Black Red +HV2 +HV1 R83 1.5k/5W 380Vdc

R81

270Vdc

1 2

8

J4

B

F2

R35 10k

+

R60 P2 100k

470 EL84

R32 4.7k

+HV3

+

C28 10nF V1-1

R34

9 2

Treble

C31 A

V10

F1

Brown +HV3

REVERB

+HV4 C30 150pF

7

F2

R28 4.7k

100nF

+

R55 68k

F1

Volume

47pF 1 2 3

R24 47k

C13

C48 470nF

Orange +HV4

SW1

C26 J3

C11

R19 100k

R59 1M R54 100k

R27 1k

1nF

BRIGHT +HV4

470

2

F1 F2

R8 10k

22nF

R33

EL84

R23 1k

1M

Bass

AUX

R15 22k

+

R5

25uF

R10 1k

Out Trafo V9 2

V2-2 ECC83

R9 1M

F2

TR1 500

F1

V6-2 ECC83

C

solder jumper

3

1 2 3

2 C4

8

R3 68k

R16 1M

10nF

P5

3

V2-1

7

R7 100k

ECC83

J2

B

6

R1 68k

1 2 3

R13 220k

Treble

47pF J1

C7

F1

9 F2 3

MAIN

R12 100k

150pF

R22 1k

F2

1

100k

-Bias F1

R18 470

C5

R6

10nF

R17 1M

R26 1k

+

BRIGHT

C8 330pF

+HV4

C2

8

+HV4 SW3

V6-1 ECC83

red

470

7

7

BEND

green

4ohm EL84

R31 4.7k

R21 47k

grey

8ohm

7

R87 330k

SW4/2

SW4/1

R4 1M

R30

2

C9 100nF

16ohm V8

R25 4.7k

+HV3

J7 DIN5F

6

C

1

3

P7

3

P8

-

R72 2.2M

2

SW7

POWER ON

1