Ampeg duette dolphin ii preamp schematic
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Extracted text from ampeg duette dolphin ii preamp schematic (Ocr-read)
Page 1
AMPEG PRE-AMP
._____. _. ,- - - _ - - _
-PTI NA-
TRIODE CHANNEL I O 0 LS
- 4 To a+220-250 r- ---------------
GSN 5 ON MAIN AMP I INPUT MATCHING lM
I20I< .05 22K .0 0 AM
.02 0005 .02 mm ,M ,20K
I- 'lMAG o-- T
I 5 TO GRID
IM TO MAIN I IM REMOVED
LOG AMP L.
'M W I _________________
ELLE i2 am
:1: I00 I l ULTRA-HIGH CONTROL
ufd l _'-
USED ONLY IN I .0005 IM
T002 \ MULTIPLE CHANNEL I
AMPLIFIERS ADDED
_- NOT USED IN ' CIRCUIT
CHANNEL WITH TREMOLO : (DASH IN)
- _____________________________________ ____,
PENTODE CHANNEL (OPTIONAL) I
- I
I
DUETTE MODEL |_
,M ALL CONTROLS I
g VOL DOLPHIN II I
VOLUME ONLY I
l
|
_l
|
I
|
F B + 250-300
47K .02 2M 2M
. I
L
A
I500 002T 2
270K
T
68N7 PREAMP AND CONNECT TREMOLO IN
REMOVE IOOufd AS SHOWN
I
-!_- FOR 63N7 CHANNEL WITH TREMOLO REMOVE LEAD I
ETOIOF
[:1TOE:I_II'RDII
2 I 2 I
STEAD