Wire colors shown for ease of description. Refer to manual for proper kit wire colors.
drawn by Robert Hull 2013
z
234 78
5
y
V2 56
4
x
J K
78
output xfmr primary
w
22uf/50V
820
v
C3
R9
R7
G14
5
G1
.1uF
u
t
100K 100K
R8
single impedance output xfmr secondary
8
8
8
4
68K 68K
68K
J1
F G H I
s
68K
.1uF
n
E
p q r
C1
C6
22uf/50V
m
R10
C2
R23
2.7K
k
D
a
R2 R1
R5 R4
1.5K 47
22K/3W
.01uF or .022uF
6
j
C7
R11
56K
4.7K/3W
C8
100K
i
C
R22
b
c
d
R12
.1uF
h
R21
220K 220K
1.5K 1M
B
A
e
R24
C9
R13
C14
C13
C12
.1uF
cap off unused tap w/ heatshrink
G5 aa
56K R14
R20
V3
7
22uf / 500V
22uf / 500V
22uf / 500V
22uf/50V
6
G4 G2 f
jumper aa to G5 for cathode bias operation
G6
R15
V4
V5 7
G8 G7
G9
G10
G11
AC safety ground point
5
signal ground point
2
C10
250 / 5W
dual primary
4
1M NORMAL VOLUME
install jumper power ground point
xfmr wired for 120V mains see manual for directions to wire for 240V mains
6
1M BRIGHT VOLUME solder buss wire to back of each pot
the different green colors are for identification only. Both wires from the actual xfmr are the same shade green.
power transformer
2
3
AC power input
1M TONE
Various output transformers are available with this kit. The wire colors differ between these transformers. Refer to appendix F and / or the TubeDepot online resources for installation differences and options.
pseudo-center tap 6.3V filament
ANALOG IN | TUBEDEPOT.COM
connect wires together
A B C
500 pfd .0047ufd
power
wire from AC cord goes to end of holder
A B C
A B C
1
standby
6.3V Lamp note how these wires are attached to separate terminals