Select a calculator:

What do these calculators do?

These calculators automate the plotting of DC and AC load lines for guitar amplifier preamp stages based on popular triodes. They also compute the cathode resistor value for a user-specified DC operating point.

Our new book puts these calculators through their paces!

This new approach to guitar amplifier electronics embraces 2018 technology to deliver greater understanding with less math. Computer-based visualization replaces the traditional litany of mathematical formulas. The book's graphing calculators, free on this website, are designed for smartphones and laptops, making them as portable as the book that uses them.

Guitar Amplifier Electronics: Basic Theory

Guitar Amplifier Electronics: Basic Theory

Less Math, Greater Understanding

The book explains the principles of vacuum tube electronics and the design of preamp voltage amplification stages, cathode followers, tone stacks, power amps, phase inverters, negative feedback, and power supplies. An entire chapter is devoted to sculpting the dynamics of overdrive and harmonic distortion.