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STEELPHON "PIONEER" - Bricolage Online
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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
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