Ovation OP-24 Plus C Pre-Amp Schematic with Tuner
guitar preamp with built-in chromatic tuner
OP-24 Plus C
9V battery (3V internal reference)
1996
US
10 components
4 diagrams
Complete preamp schematic for the Ovation OP-24 Plus C onboard guitar preamp system. Features 3-band EQ (bass, mid with switchable 400Hz/1500Hz center, treble), preshape circuit, volume control with stereo pot, EQ bypass, low battery indicator, and integrated COP912C-based chromatic tuner with sharp/flat/in-tune LED indicators. Drawing No. 51-301, Rev 1.0, dated 8/26/96. Includes PCB component placement layouts (top and bottom) with part numbers and values. Designed by Music & Technology for Ovation Instruments.
Components
TL064 quad op-amp (IC5)
COP912C tuner IC (IC2)
80732AN low-battery detector (IC1)
M5223 dual op-amp (IC3A/IC3B)
TLC3702 comparator (IC4)
2N3906 PNP transistor (Q5)
2N3904 NPN transistor (Q1/Q6)
1N4001 rectifier diode (D1)
1N5227 3.6V zener (D6)
4.00MHz crystal (XT1)