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DISCONNECT POWER WHEN
REPLACING TUBES
DÉBRANCHÉ L
’APP
AREIL
AV
ANT
DE REMPLACER LES LAMPES
To
p View
Fron
t
Block
Diagram
for
DH40H
DESIGNED
AND
MANUFACTURED
BY
YORKVILL
ES
OUND
Pream
p
V1
12AU7
Cascode
Pream
p
V2:A
1/2 12AX7
Splitte
r
V3
12AX7
Pream
p
V2:B
1/2 12AX7
Mono 1/4-inc
h
Input
I
Footswitch
0 dB
Pwr Am
p
V4,V
5
2x EL34
8-ohm
B
+
4-ohm
Mono 1/4-inc
h
Input II
-6 dB
Bass / Treble
Gain
MASTER
TONE
PRE-OU
T
AMP-IN
+
-
Speaker Ou
t
BLOCK-DIAG-DH40H-00-1v0
SOLO
PURE
CLEA
N
UP
:
MID:
DWN:
FIXED BIAS
STANDBY
CATHODE BIAS
UP
:
MID:
DWN:
POWER
EL34
V5
POWER
EL34
V4
PREAMP
12AX7
V2
PREAMP
12AU7
V1
SPLITTER
12AX7
V3
MODEL TYPE: YS1092