Op Amp Preamplifier Circuits - For MICs, Guitars, Pick-ups, Buffers | Homemade Circuit Projects
Low voltage tube preamplifier. use 12ax7 or ecc83 tube. A simple circuit, with 30v operate a voltage. It r… | Valve amplifier, Diy guitar amp, Electronic schematics
A guitar tube preamp circuit schematic. | Download Scientific Diagram