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Guitar Amplifier Electronics Basic Theory book Guitar Amplifier Preamps book Guitar Amplifier Power Amps book Fender Bassman 5F6A book

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calculatorLaunch me!

guitar amp long tailed pair circuit

What does this calculator do?

The long-tailed-pair phase inverter with negative feedback from the output transformer is one of the most ubiquitous architectures in guitar amplifier electronics. A signal from a tap in the output transformer secondary drives the feedback input to the phase inverter to counteract the amplified signal. The resulting closed-loop gain, measured from the phase inverter signal input to the speaker, is less than the forward, open-loop gain without feedback.

The calculator assumes that the resistance 2(RK+RT) is much greater than RP.


Guitar Amplifier Electronics: Basic Theory

Guitar Amplifier Electronics: Basic Theory - a modern approach to understanding tube amp design. Learn more.


Guitar Amplifier Preamps Book

Guitar Amplifier Preamps - upstream circuits using triodes and pentodes. Learn more.


Guitar Amplifier Power Amps Book

Guitar Amplifier Power Amps - from the phase inverter to the loudspeaker. Learn more.


Fender Bassman 5F6-A Book

The Fender Bassman 5F6-A - plus Marshall's Bluesbreaker and Plexi. Learn more.


Georg Simon Ohm Book

Georg Simon Ohm - Imagine a world without Ohm's Law. Learn more.