Skip to main content

Pre-Amp Schematic - Schematics

14 items in Schematics → Pre-Amp Schematic

All Bill of Materials 3 Circuit Diagram 2 Diagram 4 Pre-Amp Schematic 14 Schematic 17 Service Guide 2 Technical Drawing 1 Troubleshooting Guide 2 Wiring Diagram 2
All Bill of Materials 3 Circuit Diagram 2 Diagram 4 Pre-Amp Schematic 14 Schematic 17 Service Guide 2 Technical Drawing 1 Troubleshooting Guide 2 Wiring Diagram 2
Ovation OP-24 Plus C Pre-Amp Schematic with Tuner Pre-Amp Schematic

Ovation OP-24 Plus C Pre-Amp Schematic with Tuner

1996

View details →
Ovation OP-24 Plus C Pre-Amp Schematic with Tuner
1996 · US

Ovation OP-24 Plus C Pre-Amp Schematic with Tuner

Year: 1996

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.

Ovation Instruments HEX Buffers and Logic Schematic Rev 1.0 Pre-Amp Schematic

Ovation Instruments HEX Buffers and Logic Schematic Rev 1.0

1995

View details →
Ovation Instruments HEX Buffers and Logic Schematic Rev 1.0
1995 · US

Ovation Instruments HEX Buffers and Logic Schematic Rev 1.0

Year: 1995

Four-sheet schematic for the Ovation HEX Pre-Amp system (product 42-224A, dated 7/18/95). Sheet 1: six individual piezo transducer buffer inputs using TL064 op-amps feeding a diode matrix with CD4017/CD4013 mode switching logic (PAN, ALT, AUTO SLOW/FAST, MONO, 2/4, 3/3 modes). Sheet 2: stereo L/R mixing network using 74HC4053 analog multiplexers with mono mix summing and VCA signal paths. Sheet 3: voltage-controlled amplifier stages for L/R channels with an LFO built around a 2N5930 transistor, plus analog and digital VREF generation. Sheet 4: stereo output stage with independent jack-actuated 1/4-inch output connectors for left, right, and combined stereo output with power-on switching.

Ovation OP-X Pre-Amp Schematic Pre-Amp Schematic

Ovation OP-X Pre-Amp Schematic

1994

View details →
Ovation OP-X Pre-Amp Schematic
1994 · US

Ovation OP-X Pre-Amp Schematic

Year: 1994

Professional multi-board preamp schematic for the Ovation OP-X onboard guitar preamp system. Comprises four circuit boards: Input Board (40-601BH) with JFET buffer, state variable notch filter, and volume control; Slider Board (40-602BH with tuner, 40-603BH with graphic EQ) featuring slider-based bass/treble/600Hz/6KHz EQ controls, graphic EQ bypass, notch bypass, and chromatic tuner with calibrate function; Output Board (40-604BH) with balanced XLR output, 1/4-inch output, and 11V zener protection. Also includes battery box assembly diagram. Drawing Rev 2, dated 8/17/94, drawn by N.M. and b.h. for Ovation Instruments. Most advanced Ovation preamp design with phantom power support and professional output options.

Ovation Optima Pre-Amp Preliminary Product Specification Schematic

Ovation Optima Pre-Amp Preliminary Product Specification

1994

View details →
Ovation Optima Pre-Amp Preliminary Product Specification
1994 · US

Ovation Optima Pre-Amp Preliminary Product Specification

Year: 1994

Preliminary Product Specification (dated 8/9/94) for the Ovation Mic/Piezo Preamp (Optima). Describes a dual pickup system using piezo transducer and Telex ELM-33 sub-mini condenser mic with crossover circuit design. Includes block diagram (Fig. 1, dated 7/8/94) showing signal flow from piezo/mic inputs through low-pass/high-pass filters, crossover mixer, EQ, and balanced output. Frequency response plots for low-pass and hi-pass filters (dated 08/08/94). Controls: Volume, Blend, Treble (+/-10dB), Bass (+/-14dB), EQ Bypass, X-over (900Hz/1.8KHz), Mid Shape (500Hz, 8dB cut). Interface: 5K Ohm mic input with 9V bias, >5M Ohm piezo input. Outputs: XLR balanced with phantom power, 1/4 inch stereo jack. Chassis similar to OP-24Plus, output PCB same as Optima.

Ovation DJ-48 Pre-Amp Circuit Diagram Pre-Amp Schematic

Ovation DJ-48 Pre-Amp Circuit Diagram

1990

View details →
Ovation DJ-48 Pre-Amp Circuit Diagram
1990 · US

Ovation DJ-48 Pre-Amp Circuit Diagram

Year: 1990

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.

Ovation OP-24 Plus E Pre-Amp Schematic with Tuner Pre-Amp Schematic

Ovation OP-24 Plus E Pre-Amp Schematic with Tuner

~1990

View details →
Ovation OP-24 Plus E Pre-Amp Schematic with Tuner
~1990 · US

Ovation OP-24 Plus E Pre-Amp Schematic with Tuner

Year: 1990

Complete preamp schematic for the Ovation OP-24 Plus E onboard guitar preamp system. Electrically identical to the OP-24 Plus C variant (same Drawing No. 51-301, Rev 1.0, dated 8/26/96) but designated for a different guitar model or form factor. 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. Includes PCB component placement layouts (top and bottom) with part numbers and values. Designed by Music & Technology for Ovation Instruments.

Ovation OP-24 Plus Pre-Amp Schematic Pre-Amp Schematic

Ovation OP-24 Plus Pre-Amp Schematic

~1990

View details →
Ovation OP-24 Plus Pre-Amp Schematic
~1990 · US

Ovation OP-24 Plus Pre-Amp Schematic

Year: 1990

Single-page preamp schematic for the Ovation OP-24 Plus onboard guitar preamp (without tuner). Features JFET input buffer (2N5457), 3-band EQ (bass with boost/cut, mid with switchable 400Hz/800Hz center frequency and boost/cut, treble with boost/cut), preshape switch, volume control, EQ bypass, and low battery LED indicator. Uses a single TL064 quad op-amp for all EQ stages. Simpler design than the OP-24 Plus C/E variants which include an integrated tuner. Schematic Rev 2, designed by Richard Davis for Ovation Instruments.

Ovation OptiMax Pre-Amp Schematic Pre-Amp Schematic

Ovation OptiMax Pre-Amp Schematic

~1990

View details →
Ovation OptiMax Pre-Amp Schematic
~1990 · US

Ovation OptiMax Pre-Amp Schematic

Year: 1990

Three-sheet circuit schematic (Dwg 42-210a/b/c, Rev 1) for the Ovation OptiMax guitar preamp. Includes piezo buffer/preamp with low-pass filter, microphone buffer/preamp with high-pass filter, crossover mixer, bass EQ (+/-14dB), treble EQ (+/-10dB), mid-shape preshape, EQ bypass, volume control, phantom power supply, and balanced XLR output board. Drawn by N.M., checked by b.h., dated 8/16/94.

Ovation OptiMax Pre-Amp Schematic and Specification Package Pre-Amp Schematic

Ovation OptiMax Pre-Amp Schematic and Specification Package

~1990

View details →
Ovation OptiMax Pre-Amp Schematic and Specification Package
~1990 · US

Ovation OptiMax Pre-Amp Schematic and Specification Package

Year: 1990

Comprehensive OptiMax preamp documentation package including: 3-sheet circuit schematic (Dwg 42-210a/b/c, Rev 1, dated 8/16/94), Preliminary Product Specification for the Ovation Mic/Piezo Preamp (dated 8/9/94) describing dual pickup system with crossover circuit, system block diagram (Fig. 1, dated 7/8/94), low-pass and hi-pass frequency response plots (dated 08/08/94), and picking list/BOM (dated 29-Jun-95, part 706550-A). Controls: Volume, Blend, Treble (+/-10dB), Bass (+/-14dB), EQ Bypass, X-over (900Hz/1.8KHz), Mid Shape (500Hz, 8dB cut). Chassis similar to OP-24Plus.

Ovation Stereo VT Preamp Circuit Schematic Schematic

Ovation Stereo VT Preamp Circuit Schematic

1984

View details →
Ovation Stereo VT Preamp Circuit Schematic
1984 · US

Ovation Stereo VT Preamp Circuit Schematic

Year: 1984

Single-channel preamp circuit schematic revised 8-21-84, drawn at 3x scale (2.375 inches). Shows complete signal path from pickup input through tone and volume controls to output jack. Designed for stereo applications with tone control, used only on 12-string pre amps. Includes 8 test points (TP1-TP8) for diagnostics. Second page contains stereo jack wiring diagram by K. Keller (8/11/97) for Ovation preamp models 102000/103600 with Ovation Instruments/Kaman Music/Hamer corporate information.

Ovation Guitar Input Board Preamp Circuit (Model 5457) Pre-Amp Schematic

Ovation Guitar Input Board Preamp Circuit (Model 5457)

1980

View details →
Ovation Guitar Input Board Preamp Circuit (Model 5457)
1980 · US

Ovation Guitar Input Board Preamp Circuit (Model 5457)

Year: 1980

This is a photograph of an Ovation guitar internal input board (model 5457) featuring a preamp circuit with I2C interface. The board includes multiple resistors, capacitors, an IC, and a diode, with connections for battery power, ground, VREF, notch bypass, and a 6K gyrator. The circuit appears to serve as an onboard guitar preamp with digital control capabilities via I2C communication.

Ovation FET 3 Pre-Amp Schematic Pre-Amp Schematic

Ovation FET 3 Pre-Amp Schematic

~1970

View details →
Ovation FET 3 Pre-Amp Schematic
~1970 · US

Ovation FET 3 Pre-Amp Schematic

Year: 1970

Single JFET preamplifier circuit with passive EQ section for Ovation acoustic guitar pickup. Features a JFET input stage (T1) biased by resistor network, passive tone-shaping EQ with bass/treble control via potentiometers R2 and R8 (250K), battery-powered 9V operation with polarity protection diodes D1/D2, and pickup input with 1M input impedance (R1). Part number 703800.

Ovation K-6001 Pre-Amplifier Full Schematic Diagram Pre-Amp Schematic

Ovation K-6001 Pre-Amplifier Full Schematic Diagram

~1970

View details →
Ovation K-6001 Pre-Amplifier Full Schematic Diagram
~1970 · US

Ovation K-6001 Pre-Amplifier Full Schematic Diagram

Year: 1970

This is the complete schematic for the Ovation K-6001 guitar pre-amplifier, a multi-channel unit featuring two independent input channels with volume, treble, and bass controls, along with onboard effects including tremolo, reverb, fuzz, and a tuner output. The circuit uses primarily BC-109C and 2N3565/2N3566 transistors throughout the signal chain, mixer, and effects stages, powered by a multi-tap transformer supply providing +15V through +29V DC rails. The unit includes a foot switch interface (K-9603) for controlling reverb and fuzz effects remotely, with a power reverse switch and 200mA circuit breaker for protection.

Ovation Viper Solidbody Guitar Schematics - Models 1271 and 1273 Schematic

Ovation Viper Solidbody Guitar Schematics - Models 1271 and 1273

~1970

View details →
Ovation Viper Solidbody Guitar Schematics - Models 1271 and 1273
~1970 · US

Ovation Viper Solidbody Guitar Schematics - Models 1271 and 1273

Year: 1970

Passive pickup wiring schematics for the Ovation Viper solidbody electric guitars. Includes the 2-pickup model 1271 with 3-position selector switch and the 3-pickup model 1273 with 5-position selector switch. Both circuits use 250K tone and 500K volume potentiometers with tone capacitors in a standard passive configuration with no active electronics.

Loading more items...

Failed to load items.