Ovation DJ-48 Pre-Amp Circuit Diagram
Active 2-transistor preamp with treble/bass tone control
DJ-48
9V DC
1990
US
37 components
Onboard active preamp schematic for the Ovation DJ-4 guitar series (model DJ-48). Two-stage transistor design (KTK1170R) with independent treble and bass tone controls (100KB pots), volume control (50KB pot), IC buffer/regulator (8054 HH), LED indicator, and push-switch bypass. Powered by 9V DC via external jack.
Components
Q1 KTK1170R transistor
Q2 KTK1170R transistor
IC-01 8054 HH
VR1 100KB treble pot
VR2 100KB bass pot
VR3 50KB volume pot
R01 2.2K
R02 3.9K
R03 10K
R04 15K
R05 47K
R06 1K
R07 10K
R08 6.2K
R09 10K
R10 2.2M
R11 470K
R12 3.3K
R13 15K
R14 5.1K
R15 100K
R16 560K
C21 103pF
C22 100uF/18V
C24 10uF/16V
C25 4.7uF/16V
C26 0.022uF
C27 10uF/16V
C28 0.047uF
C29 0.0022uF
C30 0.047uF
C31 1uF/16V
LED-01 KLR-208L
SPT-220IM push switch
Pickup jack
Output jack
DC jack