VHT SPECIAL 12 User Manual page 10

1 2 3
B+5 B+5
R3
C4
100K C7
221/500V Mica 471/500V Mica
30mVAC
R6
TP1 V1A
R5 180K CLEAN
TONE 12AX7
100K VR1 1M
R7 VR2 C9
R2
7 C5 33K 2
T 2 2 1M
D JK2
T NC 33K
V1B 103/630V
104/400V
CLEAN G NC R8
12AX7 65V DC
G 33K
C8 TP3
C6
R11
472/400V R12
R1 470K
1K5 C10
C1 1M R4 473/400V R9
C3 224/400V
C2
103/500V 1K5 6K8
Ceramic 4u7/63V
R14 2
S1/VR2 SEND
101/500V
R13 1K5 LEVEL
Ceramic T
Push/Pull Pot 100K VR3
1V DC T NC
Push = Closed (Clean) 100KA
R10
G NC 68K
TP2 JK3 Pull = Open (Boost)
G
FOOT SWITCH
S1A S1B S1C S1D S1E S1F
R40 R41 R42 R43 R44 R45
1M 1M 1M 1M 1M 1M
C21 C22 C23 C24 C25 C26
C
474/100V 1u/100V 2u2/63V 4u7/63V 10u/63V 22u/63V
FILM FILM
DEPTH
2P-6T ROTARY SWITCH
S2A S2B S2C S2D S2E S2F
R47 R48 R49 R50 R51 R52
1M 1M 1M 1M 1M 1M
C27 C28 C29 C30 C31 C32
474/100V 1u/100V 2u2/63V 4u7/63V 10u/63V 22u/63V
FILM FILM
B+3
R60
220K
473/630V 473/630V 104/630V
C39 C40
C37 C38
VR8A
104/630V
A1M
R59
2
47K 7
B
R58
R57
330K V5B
3 1
1M 12AX7
B500K Speed
0.6~1.6V
VR6 R61
2
2K2
R57
S2B C41 VR7
180K
22uF/25V
Tremolo B250K Depth
T2A/250V SLO BLO POWER SWITCH
AC F1 BLACK
J3 S2
BLACK
J4
WHITE C57
J5
0.1/630V
J6
IEC WHITE WHITE
RT1
S7
NTC(10R/5A)
DP3T
YELLOW/GREEN NF72-10D15
A
234V
117V
100V
15
1 2 3
4 5 6 7
C16 10PF
B+5
R23 3M3 B+4
Reverb
80mV AC B+2 B+4
Transformer
TP4 REVERB TANK R24
C17*
R18 Red 100K
472/630V
G 220K Reverb DEEP R28
G NC VR5-SW 100K
JK6 Blue
T NC
LINE OUT C13 C17
T V2A
103/630V 332/630V
V2B R22 12AX7
R29 100R
1K 5W
12AX7
222/400V 4 2 2 2 V4A
R17 C14 12AX7
7 2 5
R27
V3A
33K VR5 220K
VR4 6V6GT
B100K Reverb 0.7V DC
R15
250KA 2.2V TP7
1K5 JK4 JK5 0.7V DC S2A
R16
T T R26
TP7 RETURN Reverb R30 C19
1M R20 1K5
T NC T NC C12 LEVEL 1K5
R19 220K C15 R25 4u7/63V
G NC G NC 4u7/63V C18
1K5 R21 22uF/63V
220K 4u7/63V
G G 470R 5W
C11
SEND RETURN
103/500V
Ceramic
80mV AC 80mV AC
TP5 TP6
V3_8
B+3
R32
R46 56K
V6A 10V AC @ 8ohm
470R 5W R54
6V6GT
1K 5W
TP19
R36 4
C33 5K6 5
S3B ORANGE 16ohm
223/400V BROWN T2
16 OHM
121V DC R37
TP20 220K V3_8 B+2 B+1
2 BROWN 8ohm 8 OHM
V4_8 RED
V5A 4 OHM
V4_8 YELLOW 4ohm
12AX7 R38 R56
220K
15R 10W DP3T
BLACK 0ohm
R33 C34 5 S5
S3C
R53 1M BLUE
R39 4 S4
470R 5W 223/400V
5K6 TEXTURE
V7A R55
1K 5W
R34 6V6GT
1K5
C35 C36
2u2/100V(I) 3u3/100V(II)
R35
FILM FILM
68V DC 56K
TP13
308V to 29V DC 303V to 29V DC 218V DC
C43 8.2n/1KV 320V DC
TP15 TP16 TP17
B+
TP14
ON
D1 B+3 B+4
STBY R70
IN4007
F3 ON R69
S6 C44 8.2n/1KV T0.5A/250V 33K/3W
STB ON/ON R67 10K/3W
EL34/6V6GT B+1 B+2
S3A 10R 5W
R68
C47
D2 IN4007 R62
100u/350V 1K 3W
T1 220K Q1
WATTS VR8B
2 FQP9N90C
RED C45 8.2n/1KV 1M
C51 C52
C49 C50
C42
ZD1
ORANGE D3 1N4007 12V 1W
R64 R66
R63 C48
100K
100u/350V 470K R65
C46 8.2n/1KV 220K
100K
BLACK
BROWN 0V D4
1N4007
100V
F2
BLUE
T8A/250V SLO BLO R72
17V
GREEN 4 5 4 5 4 5 4 5 2 2 2
220R
WHITE V5 V6 V7
V1 V2 V3 V4
D9
ORANGE 6.8V
9 9 9 9 7 7 7 IN4007
GREEN
17V
12AX7 12AX7 12AX7 12AX7 6V6GT 6V6GT 6V6GT
BROWN
R73 R74 D10
U1
100R 100R
100V 1N4007 1N4007 IN OUT LED(RED)
7809
RED D5 D6 F4
YELLOW T1A/250V SLO BLO
R75
220R
12V C56
470u/16V
D11
Title
LED (RED) VHT Special 12/20RT
YELLOW D7 D8
T NC
T
1N4007 1N4007 Size Number
JK1
9V DC OUT
A3
Date: 21-Sep-2011
4 5 6 7
8
Name/Model:
7 D
V4B
12AX7
C20
472/400V
Power Requirements & Consumption:
R31
100K
Maximum Output Power:
Speaker (combo only):
12" 16 OHMS
T JK9
T NC
INTERNAL SPK
G NC C
G
Amp Type:
T
JK7
T NC
EXT SPK1
G NC
G
T
JK8 Tubes:
T NC
EXT SPK2
G NC
G
Controls:
212V DC 212V DC
TP18 TP18
B+5
R71
B
10K/3W
C53 C54 C55 Cabinet:
Cosmetics:
Dimensions (H x W x D):
A
Net Weight:
Revision
Rev1.0
Sheet 1 of 1
8
TECHNICAL SPECIFICATIONS
VHT Special 12/20 — 12-20 watt hand-wired vacuum tube
guitar amplifier
100/115VAC, 50/60Hz; 120VAC, 60Hz;
220/230/240/VAC, 50/60Hz
12-20 watts (depending on output tube type and Volt setting)
One 12" VHT ChromeBack (60-watts, 16 ohms)
All-tube hand-wired push/pull cathode biased output stage
Four 12AX7; three 6V6
Volume (with Pull-Boost), Tone, Reverb (with Pull-Deep),
Tremolo Speed, Tremolo Fast/Slow Range,
Tremolo Intensity and Depth, Texture, Depth, Watts,
Pentode/Triode, Effects Send Level, Effects Return Level,
High/Low Volts
Finger jointed birch plywood
Black vinyl, white piping, and black grille cloth
Combo: 19'' x 19.5'' x 10.5" (475mm x 495mm x 265mm)
Head: 11" x 19.5'' x 8.5'' (280mm x 495mm x 215mm)
Head: 28 lbs. (12.5 KG)
Combo: 43 lbs. (19.5 KG)
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