Guitar Amp Design - A New Approach!

Guitar Amplifier Electronics: Basic Theory book

Basic Theory - using 21st-Century technology to design vacuum tube circuits

Fundamentals of Guitar Amplifier System Design book

System Design - a professional methodology for crafting a complete guitar amplifier

Guitar Amplifier Electronics: Circuit Simulation book

Circuit Simulation - modeling vacuum tube circuits using SPICE

calculatorLaunch me!

What does this calculator do?

This calculator was created to accompany our new book on SPICE simulation of guitar amplifier circuits.1 At one point in writing a large-signal triode model whose accuracy is optimized for a particular voltage amplifier circuit, a curve fit is required using quadratic regression. As a convenience for readers of the book, this calculator performs these calculations automatically. Specifically, the calculator computes optimal values of K1, K2, and K3 for the formula

A = K1(VG)2 + K2(VG) + K3

The algorithm requires at least 3 data points and handles up to 9 data points. Leave unused inputs equal to "0".

References

1Richard Kuehnel, Guitar Amplifier Electronics: Circuit Simulation, (Seattle: Amp Books, 2019).