4
15
1
RobRob Stereo Audio Amplifier Layout
RobRobinette.com
12AX7 2x6V6GT Single Ended Amp
1
Output Transformer
62
20
Hammond 125CSE 8W
_180
BOTH
false
false
1/4" Input Jack
127
STEREO
_90
1/4" Cliff Jack
TS
127
6 Lug Tagstrip
DEFAULT
6
false
TS
127
6 Lug Tagstrip
DEFAULT
6
false
TS
127
3 Lug Tagstrip
_90
3
false
TS
127
6 Lug Tagstrip
DEFAULT
6
false
TS
127
6 Lug Tagstrip
DEFAULT
6
false
TS
127
6 Lug Tagstrip
DEFAULT
6
false
TS
127
6 Lug Tagstrip
DEFAULT
6
false
TS
127
3 Lug Tagstrip
_90
3
false
TS
127
6 Lug Tagstrip
DEFAULT
6
false
TS
127
6 Lug Tagstrip
DEFAULT
6
false
Eyelet1
Chassis Safety Bolt
Eyelet2
Chassis Ground Bolt
Eyelet1
Chassis Grommet
Eyelet1
Chassis Grommet
Eyelet1
Chassis Grommet
Eyelet1
Chassis Grommet
Eyelet1
Chassis Grommet
Eyelet2
Chassis Ground Bolt
Volume
127
20
DEFAULT
LOG
ThroughHole
false
ShaftDown
Power Transformer
62
20
Hammond 290ABX
_90
BOTH
false
false
Choke
50
20
Hammond 194E 30H 100ma
DEFAULT
BOTH
false
false
Output Transformer
62
20
Hammond 125CSE 8W
DEFAULT
BOTH
false
false
V2
127
B9A
12AX7 Tube & Socket
320
1,2,3,4,5,6,7,8,9
CHASSIS
V4
127
OCTAL
6V6GT Tube & Socket
45
n/c,H,P,S,G,n/c,H,C
CHASSIS
V3
127
OCTAL
6V6GT Tube & Socket
45
n/c,H,P,S,G,n/c,H,C
CHASSIS
127
IEC Socket
DEFAULT
PL1
127
DEFAULT
0
Right Speaker -
127
Left Speaker +
127
Left Speaker +
127
Right Speaker -
127
Power DPST Carling
127
SPST
VERTICAL
Power DPST Carling
127
SPST
VERTICAL
Volume
127
20
DEFAULT
LOG
ThroughHole
false
ShaftDown
W1
127
FOUR
true
-1
_22
false
C3 0.047uF 630V
127
NAME
false
Directional
false
false
_63V
false
R8 470K
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
W1
127
FOUR
true
-1
_20
false
L2
Chassis Ground
false
CENTER
CENTER
DEFAULT
W1
127
FOUR
true
-1
_28
false
W1
127
FOUR
true
-1
_20
false
W1
127
FOUR
true
-1
_20
false
W1
127
FOUR
true
-1
_28
false
W1
127
FOUR
true
-1
_28
false
RG174
127
FOUR
true
-1
_18
false
L2
Power DPST
false
CENTER
CENTER
DEFAULT
L2
Output Left
false
CENTER
CENTER
DEFAULT
L2
Output Right
false
CENTER
CENTER
DEFAULT
L2
NFB
false
LEFT
CENTER
DEFAULT
L2
RG174
false
LEFT
CENTER
DEFAULT
L2
+
false
CENTER
CENTER
DEFAULT
L2
+
false
CENTER
CENTER
DEFAULT
W1
127
FOUR
true
-1
_28
false
W1
127
FOUR
true
-1
_18
false
W1
127
FOUR
true
-1
_18
false
W1
127
FOUR
true
-1
_18
false
W1
127
FOUR
true
-1
_18
false
W2
127
FOUR
true
-1
_18
false
false
L2
NFB
false
LEFT
CENTER
DEFAULT
L2
RG174
false
LEFT
CENTER
DEFAULT
L2
Hot
false
CENTER
CENTER
DEFAULT
L2
Safety
false
CENTER
CENTER
DEFAULT
W2
127
FOUR
true
-1
_18
false
false
W1
127
FOUR
true
-1
_18
false
W2
127
FOUR
true
-1
_18
false
false
Bridge Rectifier
100
20
BR-3
_180
+
~
~
-
VALUE
SquareBR3
Horizontal
W2
127
FOUR
true
-1
_18
false
false
W1
127
FOUR
true
-1
_20
false
W1
127
FOUR
true
-1
_18
false
W1
127
FOUR
true
-1
_18
false
W2
127
FOUR
true
-1
_18
false
false
W1
127
FOUR
true
-1
_18
false
W1
127
FOUR
true
-1
_18
false
W1
127
FOUR
true
-1
_20
false
C5 100uF 450V F&T
127
20
NAME
false
Directional
false
false
_63V
true
W1
127
FOUR
true
-1
_20
false
W1
127
FOUR
true
-1
_20
false
W1
127
FOUR
true
-1
_20
false
W1
127
FOUR
true
-1
_20
false
W1
127
FOUR
true
-1
_26
false
W1
127
FOUR
true
-1
_26
false
C8 22uF 450V F&T
127
20
NAME
false
Directional
false
false
_63V
true
C7 22uF 450V F&T
127
20
NAME
false
Directional
false
false
_63V
true
R14 470K
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
W1
127
FOUR
true
-1
_26
false
W1
127
FOUR
true
-1
_26
false
W1
127
FOUR
true
-1
_22
false
GND1
DEFAULT
DEFAULT
GND1
DEFAULT
DEFAULT
GND1
DEFAULT
DEFAULT
GND1
DEFAULT
DEFAULT
W1
127
FOUR
true
-1
_20
false
L2
Shown Wired For 120V Primary
false
CENTER
CENTER
DEFAULT
L2
2A Fuse
false
CENTER
CENTER
DEFAULT
L2
1W
false
CENTER
CENTER
DEFAULT
L2
Choke
false
CENTER
CENTER
_270
L2
B+
false
CENTER
CENTER
DEFAULT
L2
B+1
false
CENTER
CENTER
DEFAULT
L2
B+2
false
CENTER
CENTER
DEFAULT
L2
B+3
false
CENTER
CENTER
DEFAULT
W1
127
FOUR
true
-1
_26
false
W1
127
FOUR
true
-1
_22
false
W1
127
FOUR
true
-1
_22
false
R8 470K
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
R7 1K
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
W1
127
FOUR
true
-1
_28
false
W1
127
FOUR
true
-1
_28
false
W1
127
FOUR
true
-1
_28
false
W1
127
FOUR
true
-1
_28
false
W1
127
FOUR
true
-1
_20
false
W1
127
FOUR
true
-1
_20
false
L2
8
false
CENTER
CENTER
DEFAULT
L2
Neutral
false
CENTER
CENTER
DEFAULT
L2
Alternative OT
false
CENTER
CENTER
DEFAULT
L2
125DSE 10W
false
CENTER
CENTER
DEFAULT
L2
Bridge
false
CENTER
CENTER
DEFAULT
L2
Rectifier
false
CENTER
CENTER
DEFAULT
L2
1
false
CENTER
CENTER
DEFAULT
L2
8
false
CENTER
CENTER
DEFAULT
W1
127
FOUR
true
-1
_22
false
R6 100K
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
L2
1W
false
CENTER
CENTER
DEFAULT
W1
127
FOUR
true
-1
_20
false
W1
127
TWO
true
-1
_28
false
W2
127
FOUR
true
-1
_20
false
false
L2
A RobRobinette.com Design V1.9a
false
RIGHT
CENTER
DEFAULT
L2
Pilot Light
false
CENTER
CENTER
DEFAULT
W1
127
FOUR
true
-1
_20
false
W1
127
FOUR
true
-1
_20
false
L2
Ground Bolt
false
CENTER
CENTER
DEFAULT
L2
HV
false
CENTER
CENTER
DEFAULT
L2
6.3V
false
CENTER
CENTER
DEFAULT
L2
I.E.C.
false
CENTER
CENTER
DEFAULT
W1
127
FOUR
true
-1
_20
false
W1
127
FOUR
true
-1
_28
false
L2
290V 100ma, 6.3V 5A
false
LEFT
CENTER
DEFAULT
L2
Output Transformer Hammond 125CSE 5K:8 Ohm 8W
false
LEFT
CENTER
DEFAULT
L2
Choke Hammond 194E
false
LEFT
CENTER
DEFAULT
L2
Power Transformer Hammond 290ABX
false
LEFT
CENTER
DEFAULT
L2
NFB
false
LEFT
CENTER
DEFAULT
L2
RG174
false
LEFT
CENTER
DEFAULT
L2
NFB
false
LEFT
CENTER
DEFAULT
L2
RG174
false
LEFT
CENTER
DEFAULT
L2
Do Not Twist
false
CENTER
CENTER
DEFAULT
L2
Do Not Twist
false
CENTER
CENTER
DEFAULT
L2
Do Not Twist
false
CENTER
CENTER
DEFAULT
L2
Do Not Twist
false
CENTER
CENTER
DEFAULT
L2
Resistors 1/2 Watt Unless Specified
false
LEFT
CENTER
DEFAULT
L2
Choke Is Mounted Above Filter Caps
false
LEFT
CENTER
DEFAULT
L2
B+3 Filter
false
CENTER
CENTER
DEFAULT
L2
B+2 Filter
false
CENTER
CENTER
DEFAULT
L2
B+ Filter
false
CENTER
CENTER
DEFAULT
L2
Grid Leak
false
CENTER
CENTER
DEFAULT
L2
Grid Stop
false
CENTER
CENTER
DEFAULT
L2
Plate Load
false
CENTER
CENTER
DEFAULT
L2
Coupling
false
CENTER
CENTER
DEFAULT
L2
Dropping
false
CENTER
CENTER
_270
L2
Dropping
false
CENTER
CENTER
_270
L2
Grid Leak
false
CENTER
CENTER
DEFAULT
L2
1/4" Mono Switched Cliff Jacks
false
CENTER
CENTER
DEFAULT
W1
127
FOUR
true
-1
_22
false
L2
Right
false
CENTER
CENTER
DEFAULT
L2
Left
false
CENTER
CENTER
DEFAULT
W1
127
FOUR
true
-1
_22
false
R4 100K
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
L2
1W
false
CENTER
CENTER
DEFAULT
C2 0.1uF 630V
127
NAME
false
Directional
false
false
_63V
false
W1
127
FOUR
true
-1
_28
false
W1
127
TWO
true
-1
_24
false
W1
127
FOUR
true
-1
_22
false
L2
Tip
false
LEFT
CENTER
DEFAULT
L2
Sleeve - Ground
false
LEFT
CENTER
DEFAULT
L2
Switch
false
CENTER
CENTER
DEFAULT
L2
Switch
false
CENTER
CENTER
DEFAULT
L2
Switch
false
CENTER
CENTER
DEFAULT
L2
Bleeder
false
CENTER
CENTER
DEFAULT
W1
127
FOUR
true
-1
_18
true
C6 100uF 450V F&T
127
20
NAME
false
Directional
false
false
_63V
true
W1
127
THREE
true
-1
_20
false
W1
127
THREE
true
-1
_20
false
L2
Screen
false
CENTER
CENTER
DEFAULT
L2
Use Yellow & Black
false
RIGHT
CENTER
DEFAULT
L2
Secondary Wires
false
RIGHT
CENTER
DEFAULT
L2
For 8 Ohms
false
RIGHT
CENTER
DEFAULT
L2
Coupling
false
CENTER
CENTER
DEFAULT
L2
For more info see https://robrobinette.com/RobRob_Stereo.htm
false
LEFT
CENTER
DEFAULT
L2
Edcore GSXE10-5K 10W
false
CENTER
CENTER
DEFAULT
L2
125BSE 5W
false
CENTER
CENTER
DEFAULT
L2
Alternative OT
false
CENTER
CENTER
DEFAULT
L2
125DSE 10W
false
CENTER
CENTER
DEFAULT
L2
Edcore GSXE10-5K 10W
false
CENTER
CENTER
DEFAULT
L2
125BSE 5W
false
CENTER
CENTER
DEFAULT
L2
Shell Ground
false
CENTER
CENTER
DEFAULT
L2
Transformer Bolt
false
CENTER
CENTER
DEFAULT
L2
RobRob Stereo Amp
false
CENTER
CENTER
DEFAULT
L2
Use Yellow & Black
false
LEFT
CENTER
DEFAULT
L2
Secondary Wires
false
LEFT
CENTER
DEFAULT
L2
For 8 Ohms
false
LEFT
CENTER
DEFAULT
L2
Plate Load
false
CENTER
CENTER
DEFAULT
L2
B+1 Filter
false
CENTER
CENTER
DEFAULT
L2
1
false
CENTER
CENTER
DEFAULT
RG174
127
FOUR
true
-1
_18
false
W1
127
FOUR
true
-1
_20
false
R12 2.2K
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
L2
3W
false
CENTER
CENTER
DEFAULT
R7 1K
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
W1
127
THREE
true
-1
_20
false
W2
127
FOUR
true
-1
_20
false
false
W1
127
THREE
true
-1
_20
false
L2
Grid Stop
false
CENTER
CENTER
DEFAULT
R10 470
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
W1
127
THREE
true
-1
_20
false
W1
127
THREE
true
-1
_20
false
W1
127
FOUR
true
-1
_26
false
W1
127
FOUR
true
-1
_22
false
R13 8.2K
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
W1
127
FOUR
true
-1
_22
false
W1
127
THREE
true
-1
_20
false
W1
127
THREE
true
-1
_20
false
W2
127
FOUR
true
-1
_20
false
false
L2
V2 12AX7
false
CENTER
CENTER
DEFAULT
W1
127
FOUR
true
-1
_22
false
W1
127
FOUR
true
-1
_20
false
W1
127
FOUR
true
-1
_28
false
C1 250uF 10V
127
NAME
false
Directional
false
false
_63V
true
R3 1.5K
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
W1
127
THREE
true
-1
_20
false
W1
127
THREE
true
-1
_20
false
L2
Cathode
false
CENTER
CENTER
DEFAULT
W1
127
FOUR
true
-1
_28
false
V1
127
B9A
12AX7 Tube & Socket
320
1,2,3,4,5,6,7,8,9
CHASSIS
C3 0.047uF 630V
127
NAME
false
Directional
false
false
_63V
false
W1
127
FOUR
true
-1
_28
false
R11 22K
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
GND1
DEFAULT
DEFAULT
GND1
DEFAULT
DEFAULT
R6 100K
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
W1
127
TWO
true
-1
_28
false
W1
127
FOUR
true
-1
_28
false
R4 100K
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
C2 0.1uF 630V
127
NAME
false
Directional
false
false
_63V
false
R5 1.5K
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
W1
127
FOUR
true
-1
_28
false
W1
127
TWO
true
-1
_28
false
W1
127
FOUR
true
-1
_28
false
W1
127
THREE
true
-1
_20
false
W1
127
THREE
true
-1
_20
false
W1
127
THREE
true
-1
_20
false
W1
127
THREE
true
-1
_20
false
W1
127
FOUR
true
-1
_22
false
W1
127
FOUR
true
-1
_28
false
C1 250uF 10V
127
NAME
false
Directional
false
false
_63V
true
R3 1.5K
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
W2
127
FOUR
true
-1
_20
false
false
L2
V3 6V6GT
false
CENTER
CENTER
DEFAULT
L2
HV 290V 100ma
false
LEFT
CENTER
DEFAULT
L2
6.3V 5A
false
RIGHT
CENTER
DEFAULT
L2
B+3
false
CENTER
CENTER
DEFAULT
L2
1W
false
CENTER
CENTER
DEFAULT
L2
Plate Load
false
CENTER
CENTER
DEFAULT
L2
Cathode
false
CENTER
CENTER
DEFAULT
L2
NFB
false
CENTER
CENTER
DEFAULT
L2
Coupling
false
CENTER
CENTER
DEFAULT
L2
1W
false
CENTER
CENTER
DEFAULT
L2
Coupling
false
CENTER
CENTER
DEFAULT
L2
Shield Grounded
false
LEFT
CENTER
DEFAULT
L2
Cathode
false
CENTER
CENTER
DEFAULT
1/4" input Jack
127
MONO
_90
1/4" Cliff Jack
W1
127
TWO
true
-1
_24
false
L2
V1 12AX7
false
CENTER
CENTER
DEFAULT
L2
Sleeve - Ground
false
LEFT
CENTER
DEFAULT
L2
Right
false
CENTER
CENTER
DEFAULT
L2
Left
false
CENTER
CENTER
DEFAULT
W1
127
FOUR
true
-1
_22
false
W1
127
FOUR
true
-1
_22
false
W1
127
FOUR
true
-1
_22
false
Hum Balance
127
20
_270
LIN
ThroughHole
false
ShaftUp
W1
127
FOUR
true
-1
_22
true
W1
127
THREE
true
-1
_22
false
W1
127
THREE
true
-1
_22
false
L2
Shaft Up
false
CENTER
CENTER
DEFAULT
L2
No Exterior Access
false
CENTER
CENTER
DEFAULT
R10 470
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
W1
127
FOUR
true
-1
_22
false
W1
127
FOUR
true
-1
_22
false
W1
127
FOUR
true
-1
_22
false
R1 1M
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
R1 1M
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
W1
127
FOUR
true
-1
_22
false
R2 33K
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
W1
127
FOUR
true
-1
_22
false
L2
Screen
false
CENTER
CENTER
DEFAULT
L2
V4 6V6GT
false
CENTER
CENTER
DEFAULT
L2
B+3
false
CENTER
CENTER
DEFAULT
L2
B+3
false
CENTER
CENTER
DEFAULT
L2
Plate Load
false
CENTER
CENTER
DEFAULT
L2
Grid Stop
false
CENTER
CENTER
DEFAULT
W1
127
FOUR
true
-1
_22
false
R9 470 5W
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
L2
Cathode
false
CENTER
CENTER
DEFAULT
C4 100uF 50V
127
NAME
false
Directional
false
false
_63V
true
R2 33K
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
R11 22K
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
W1
127
TWO
true
-1
_28
false
W1
127
FOUR
true
-1
_28
false
L2
Grid Stop
false
CENTER
CENTER
DEFAULT
L2
NFB
false
CENTER
CENTER
DEFAULT
L2
Shield Grounded
false
LEFT
CENTER
DEFAULT
W1
127
FOUR
true
-1
_22
false
R5 1.5K
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
W1
127
FOUR
true
-1
_28
false
L2
Cathode
false
CENTER
CENTER
DEFAULT
W1
127
FOUR
true
-1
_28
false
W1
127
FOUR
true
-1
_22
false
W1
127
FOUR
true
-1
_22
false
L2
B+3
false
CENTER
CENTER
DEFAULT
L2
Ground Bus
false
CENTER
CENTER
_270
C4 100uF 50V
127
NAME
false
Directional
false
false
_63V
true
L2
Cathode
false
CENTER
CENTER
DEFAULT
R9 470 5W
127
NAME
false
Directional
false
false
HALF
_5_BAND
Standard
GND1
DEFAULT
DEFAULT
GND1
DEFAULT
DEFAULT
L2
2W
false
CENTER
CENTER
DEFAULT
L2
Tip
false
LEFT
CENTER
DEFAULT
L2
Speaker Binding Posts Or Switchcraft 12A Jacks
false
CENTER
CENTER
DEFAULT
L2
Speaker Binding Posts Or Switchcraft 12A Jacks
false
CENTER
CENTER
DEFAULT
L2
NFB
false
LEFT
CENTER
DEFAULT
L2
RG174
false
LEFT
CENTER
DEFAULT
W1
127
THREE
true
-1
_20
false
W1
127
THREE
true
-1
_20
false