Kit1 300B2014 EditionSingle Ended Triode 8 Watt
Interwiring Diagrams: Volume One
Kit1 300B Single Ended T-199 Mains Transformer
W23 W22 W21 W20
W11 W4
W14
W18
W15
W19
6SN7
1 1 1
8
w8 w7 w6
W5
W3
W13
W2
W28 W27 W26 W25
W24 W23 W22 W21
GND W14-W20
PS PCB
1 2
8
3 4
5 6 7
5U4G
Mains Primary Mains Secondary
Overview of Kit1 layout
Chassis GND
IEC Section
AC
-1
AC
-1
AC
-2
AC
-2
gnd
DC
D
C
gnd
300B Hardwiring Section 1K8 Resistors, 220uf CAPS , 1K Grid resistors
A B C D E F G H I J K L M N
300B Hardwiring Section PS GNDS, FILAMENT WIRES
PS GND
A B C D E F G H I J K L M N
From Filament Board
From Filament Board
A B C D E F G H I J K L M N
300B Hardwiring Section O/P tx red wires connected COMPLETE w/ Voltage Checks for Power on with tubes installed
PS GND
A B C D E F G H I J K L M N
70v DC
70v DC
425v DC
425v DC
Kit1 300B Single Ended T-199 Mains Transformer
W23 W22 W21 W20
W11 W4
W14
W18
W15
W19
6SN7
1 1 1
8
w8 w7 w6
W5
W3
W13
W2
W28 W27 W26 W25
W24 W23 W22 W21
GND W14-W20
PS PCB
1 2
8
3 4
5 6 7
5U4G
Mains Primary Mains Secondary
Power Supply >> Driver Board Wiring – This is the HT voltage for the driver tubes
AC
-1
AC
-1
AC
-2
AC
-2
gnd
DC
D
C
gnd
Kit1 300B Single Ended T-199 Mains Transformer
W23 W22 W21 W20
W11 W4
W14
W18
W15
W19
6SN7
1 1 1
8
w8 w7 w6
W5
W3
W13
W2
W28 W27 W26 W25
W24 W23 W22 W21
GND W14-W20
PS PCB
1 2
8
3 4
5 6 7
5U4G
Mains Primary Mains Secondary
AC
-1
AC
-1
AC
-2
AC
-2
gnd
DC
D
C
gnd
Kit1 300B Single Ended T-199 Mains Transformer
W23 W22 W21 W20
W11 W4
W14
W18
W15
W19
6SN7
1 1 1
8
w8 w7 w6
W5
W3
W13
W2
W28 W27 W26 W25
W24 W23 W22 W21
GND W14-W20
PS PCB
1 2
8
3 4
5 6 7
5U4G
Mains Primary Mains Secondary
AC
-1
AC
-1
AC
-2
AC
-2
gnd
DC
D
C
gnd
Kit1 300B Single Ended T-199 Mains Transformer
W23 W22 W21 W20
W11 W4
W14
W18
W15
W19
6SN7
1 1 1
8
w8 w7 w6
W5
W3
W13
W2
W28 W27 W26 W25
W24 W23 W22 W21
GND W14-W20
PS PCB
1 2
8
3 4
5 6 7
5U4G
Mains Primary Mains Secondary
AC
-1
AC
-1
AC
-2
AC
-2
gnd
DC
D
C
gnd
Kit1 300B Single Ended T-199 Mains Transformer
W23 W22 W21 W20
W11 W4
W14
W18
W15
W19
6SN7
1 1 1
8
w8 w7 w6
W5
W3
W13
W2
W28 W27 W26 W25
W24 W23 W22 W21
GND W14-W20
PS PCB
1 2
8
3 4
5 6 7
5U4G
Mains Primary Mains Secondary
Brown wires from Mains Secondary
Filament Supply for the 6SN7 tube
AC
-1
AC
-1
AC
-2
AC
-2
gnd
DC
D
C
gnd
7
Kit1 300B Single Ended T-199 Mains Transformer
W23 W22 W21 W20
W11 W4
W14
W18
W15
W19
6SN7
1 1 1
8
w8 w7 w6
W5
W3
W13
W2
W28 W27 W26 W25
W24 W23 W22 W21
GND W14-W20
PS PCB
W6
1 2
8
3 4
5 6 7
5U4G
Mains Primary Mains Secondary
Connect the filaments between the two 5687 tubes
AC
-1
AC
-1
AC
-2
AC
-2
gnd
DC
D
C
gnd
8
4 4
8
Kit1 300B Single Ended T-199 Mains Transformer
W23 W22 W21 W20
W11 W4
W14
W18
W15
W19
6SN7
1 1 1
8
w8 w7 w6
W5
W3
W13
W2
W28 W27 W26 W25
W24 W23 W22 W21
GND W14-W20
PS PCB
1 2
8
3 4
5 6 7
5U4G
Mains Primary Mains Secondary
5687 Filament supply from the Mains
AC
-1
AC
-1
AC
-2
AC
-2
gnd
DC
D
C
gnd
Kit1 300B Single Ended T-199 Mains Transformer
W23 W22 W21 W20
W11 W4
W14
W18
W15
W19
6SN7
1 1 1
8
w8 w7 w6
W5
W3
W13
W2
W28 W27 W26 W25
W24 W23 W22 W21
GND W14-W20
PS PCB
W6
1 2
8
3 4
5 6 7
5U4G
Mains Primary Mains Secondary
1
High Voltage to to the Rectifier Tube
Orange/White A
C-1
A
C-1
AC
-2
AC
-2
gnd
DC
D
C
gnd
Kit1 300B Single Ended T-199 Mains Transformer
W23 W22 W21 W20
W11 W4
W14
W18
W15
W19
6SN7
1 1 1
8
w8 w7 w6
W5
W3
W13
W2
W28 W27 W26 W25
W24 W23 W22 W21
GND W14-W20
PS PCB
1 2
8
3 4
5 6 7
5U4G
Mains Primary Mains Secondary
High Voltage to to the Rectifier Tube
Brown/White
& Blue/White connect to GND
AC
-1
AC
-1
AC
-2
AC
-2
gnd
DC
D
C
gnd
Kit1 300B Single Ended T-199 Mains Transformer
W23 W22 W21 W20
W11 W4
W14
W18
W15
W19
6SN7
1 1 1
8
w8 w7 w6
W5
W3
W13
W2
W28 W27 W26 W25
W24 W23 W22 W21
GND W14-W20
PS PCB
W6
1 2
8
3 4
5 6 7
5U4G
Mains Primary Mains Secondary
High Voltage to to the Rectifier Tube
prepared Ground cable
AC
-1
AC
-1
AC
-2
AC
-2
gnd
DC
D
C
gnd
Kit1 300B Single Ended T-199 Mains Transformer
W23 W22 W21 W20
W11 W4
W14
W18
W15
W19
6SN7
1 1 1
8
w8 w7 w6
W5
W3
W13
W2
W28 W27 W26 W25
W24 W23 W22 W21
GND W14-W20
PS PCB
1 2
8
3 4
5 6 7
5U4G
Mains Primary Mains Secondary
High Voltage and yellow filament supply for 5U4G along with the power supply board connection
AC
-1
AC
-1
AC
-2
AC
-2
gnd
DC
D
C
gnd
Kit1 300B Single Ended T-199 Mains Transformer
W23 W22 W21 W20
W11 W4
W14
W18
W15
W19
6SN7
1 1 1
8
w8 w7 w6
W5
W3
W13
W2
W28 W27 W26 W25
W24 W23 W22 W21
GND W14-W20
PS PCB
1 2
8
3 4
5 6 7
5U4G
Mains Primary Mains Secondary
Ground Connections
3 grounds used to connect from Power supply to tag strip and driver board
AC
-1
AC
-1
AC
-2
AC
-2
gnd
DC
D
C
gnd
A B C D E F G H I J K L M N
Kit1 300B Single Ended T-199 Mains Transformer
W23 W22 W21 W20
W11 W4
W14
W18
W15
W19
6SN7
1 1 1
8
w8 w7 w6
W5
W3
W13
W2
W28 W27 W26 W25
W24 W23 W22 W21
GND W14-W20
PS PCB
1 2
8
3 4
5 6 7
5U4G
Mains Primary Mains Secondary
Ground Connections
violet & green/yellow
AC Filament supply to filament board
AC
-1
AC
-1
AC
-2
AC
-2
gnd
DC
D
C
gnd
A B C D E F G H I J K L M N
Kit1 300B Single Ended T-199 Mains Transformer
W23 W22 W21 W20
W11 W4
W14
W18
W15
W19
6SN7
1 1 1
8
w8 w7 w6
W5
W3
W13
W2
W28 W27 W26 W25
W24 W23 W22 W21
GND W14-W20
PS PCB
W6
1 2
8
3 4
5 6 7
5U4G
Mains Primary Mains Secondary
Ground Connections
Blue & Black wires
AC Filament supply to filament board
AC
-1
AC
-1
AC
-2
AC
-2
gnd
DC
D
C
gnd
A B C D E F G H I J K L M N
Kit1 300B Single Ended T-199 Mains Transformer
W23 W22 W21 W20
W11 W4
W14
W18
W15
W19
6SN7
1 1 1
8
w8 w7 w6
W5
W3
W13
W2
W28 W27 W26 W25
W24 W23 W22 W21
GND W14-W20
PS PCB
W6
1 2
8
3 4
5 6 7
5U4G
Mains Primary Mains Secondary
Output transformer primary connecting to the 300B and the Power supply Ground
AC
-1
AC
-1
AC
-2
AC
-2
gnd
DC
D
C
gnd
A B C D E F G H I J K L M N
Kit1 300B Single Ended T-199 Mains Transformer
W23 W22 W21 W20
W11 W4
W14
W18
W15
W19
6SN7
1 1 1
8
w8 w7 w6
W5
W3
W13
W2
W28 W27 W26 W25
W24 W23 W22 W21
GND W14-W20
PS PCB
W6
1 2
8
3 4
5 6 7
5U4G
Mains Primary Mains Secondary
Choke Wires
AC
-1
AC
-1
AC
-2
AC
-2
gnd
DC
D
C
gnd
A B C D E F G H I J K L M N
Kit1 300B Single Ended T-199 Mains Transformer
W23 W22 W21 W20
W11 W4
W14
W18
W15
W19
6SN7
1 1 1
8
w8 w7 w6
W5
W3
W13
W2
W28 W27 W26 W25
W24 W23 W22 W21
GND W14-W20
PS PCB
W6
1 2
8
3 4
5 6 7
5U4G
Mains Primary Mains Secondary
Choke Wires
Driver board output to 300B tubes – purple wire
& Choke connections to the Power Supply Board
AC
-1
AC
-1
AC
-2
AC
-2
gnd
DC
D
C
gnd
A B C D E F G H I J K L M N
Kit1 300B Single Ended T-199 Mains Transformer
W23 W22 W21 W20
W11 W4
W14
W18
W15
W19
6SN7
1 1 1
8
w8 w7 w6
W5
W3
W13
W2
W28 W27 W26 W25
W24 W23 W22 W21
GND W14-W20
PS PCB
W6
1 2
8
3 4
5 6 7
5U4G
Mains Primary Mains Secondary
Choke Wires
PS VOLTAGE CHECKS
375v DC
395v DC
450v DC
375v DC
395v DC
AC
-1
AC
-1
AC
-2
AC
-2
gnd
DC
D
C
gnd
A B C D E F G H I J K L M N
Kit1 300B Single Ended T-199 Mains Transformer
W23 W22 W21 W20
W11 W4
W14
W18
W15
W19
6SN7
1 1 1
8
w8 w7 w6
W5
W3
W13
W2
W28 W27 W26 W25
W24 W23 W22 W21
GND W14-W20
PS PCB
1 2
8
3 4
5 6 7
5U4G
Mains Primary Mains Secondary
Choke Wires
AN-A cable connecting from RCA to input driver board
AC
-1
AC
-1
AC
-2
AC
-2
gnd
DC
D
C
gnd
SINGLE INPUT ONLY
Kit1 300B Single Ended T-199 Mains Transformer
W23 W22 W21 W20
W11 W4
W14
W18
W15
W19
1 1 1
8
w8 w7 w6
W5
W3
W13
W2
W28 W27 W26 W25
W24 W23 W22 W21
GND W14-W20
PS PCB
1 2
8
3 4
5 6 7
5U4G
Mains Primary Mains Secondary
Overview of Kit1 layout
Chassis GND AC
-1
AC
-1
AC
-2
AC
-2
gnd
DC
D
C
gnd
rca
ELMA
W1 W2 W3
W7 W8
Selector Switch Version
Prepared Cable
Black wire twisted from
Mains primary
White wires twisted from Mains primary
Prepared cable
120v operation
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