calculatorLaunch me!

What does this calculator do?


Compared to other calculators we've posted, this one is extremely simple. Even if we don't remember the formula for DC heat dissipation in a resistor, a little Ohm's Law and the definition of power can easily create it. On the other hand, forgetting to calculate power ratings, particularly for cathode resistors and RC ripple filters, is one of the most common mistakes designers make. Ditto for placing a heat-sensitive capacitor next to some amp-warming ohms. So hopefully the mere presence of this calculator will serve as a reminder to include heat dissipation concerns in the final design. The calculator computes the DC heat dissipation in a resistor based on its value and either the voltage across it or the current through it.

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.


1Work, Voltage, and Power.

2Georg Simon Ohm's Law.