Ovation Mono VT Preamp Schematic (Drawing 700400)
Active mono preamp (single-transistor FET preamplifier with volume/tone control)
Ovation Mono VT Preamp, Drawing 700400
9V DC (battery)
1983
US
16 components
Single-transistor FET-based active preamplifier circuit for Ovation guitars with piezo pickup. Features high-impedance input (1 MEG), tone-shaping network with dual 100mH inductors and capacitors, and a 100K volume potentiometer. 9V battery powered. Drawing at 3x scale (2.375 inches). Revised 2/19/83.
Components
Piezo pickup input
0.047uF capacitor (input coupling)
1 MEG ohm resistor (input impedance)
100K ohm resistor
15K ohm resistor
50K ohm trim potentiometer
47K ohm resistor
5.62K ohm resistor
0.22uF capacitor
0.47uF capacitor
4.7uF 25V electrolytic capacitor (x2)
100mH inductor (x2)
Transistor (FET, single-stage amplifier)
Volume 100K ohm potentiometer
1/4 inch output jack
9V battery