### Amp Books Tutorials

#### Visualizing Basic Concepts

 Electric Charge and Electric Current Is plate current measured in "milliamps" or "milliamperes?" You decide! :root { --animation-delay: 200ms; } .dac { animation-name: dacMove; animation-duration: 1s; animation-iteration-count: infinite; animation-delay: var(--animation-delay); animation-timing-function: linear; } @keyframes dacMove { 0% { transform: translateY(0px); } 100% { transform: translateY(-100px); } } .dac2 { animation-name: dacMove2; animation-duration: 1s; animation-iteration-count: infinite; animation-delay: 400ms; animation-timing-function: linear; } @keyframes dacMove2 { 0% { transform: translateY(0px); } 100% { transform: translateY(-100px); } } .dac3 { animation-name: dacMove3; animation-duration: 1s; animation-iteration-count: infinite; animation-delay: 600ms; animation-timing-function: linear; } @keyframes dacMove3 { 0% { transform: translateY(0px); } 100% { transform: translateY(-100px); } } .dac4 { animation-name: dacMove4; animation-duration: 1s; animation-iteration-count: infinite; animation-delay: 8ms; animation-timing-function: linear; } @keyframes dacMove4 { 0% { transform: translateY(0px); } 100% { transform: translateY(-100px); } } .dac5 { animation-name: dacMove5; animation-duration: 1s; animation-iteration-count: infinite; animation-delay: 800ms; animation-timing-function: linear; } @keyframes dacMove5 { 0% { transform: translateY(0px); } 100% { transform: translateY(-100px); } } Work, Voltage, and Power How much work is required to carry a Twin Reverb around the block? The answer may surprise you! 10V .electrons { animation: dash 5s linear; animation-iteration-count: infinite; } @keyframes dash { to { stroke-dashoffset: 1000; } } How Vacuum Tube Triodes Work Thomas Alva Edison was working to improve the incandescent light bulb and made a shocking discovery even he could not explain! + _ How Vacuum Tube Pentodes Work The truth revealed! Why most designers prefer triodes for their preamps but insist on multi-grids when they need raw power. Georg Simon Ohm's Law "According to Ohm's Law" is the most ubiquitous phrase in electronics today - find out why! 270VDC The Voltage Divider Divide and conquer! A simple solution for inter-stage coupling, volume controls, feedback loops, tone stacks, attenuators, and so much more! in out The Current Divider Add this to your toolbox! Insiders say it holds the key to unraveling the truth about Marshall JCM 800 grid-stopper resistors. Gustav Robert Kirchhoff's Voltage Law With one simple loop you can determine the DC grid bias for the Ampeg B-42-X first stage - we show you how! Loop 1 RG RK G K .loop1 { stroke-dasharray: 2000; stroke-dashoffset: 2000; animation: dash1 2s linear forwards; animation-iteration-count: infinite; } @keyframes dash1 { to { stroke-dashoffset: 0; } } Gustav Robert Kirchhoff's Current Law Trapped in a bunch of loops? Try nodes instead!

#### SPICE Simulation

 Epiphone Deluxe EA-10 Power Amp Tempted to skimp on cathode bypass capacitors? SPICE simulation shows why you may be making a huge mistake! Plotting Intermodulation Distortion Using LTspice IMD for single-ended and push-pull designs - shocking graphs you won't want to miss!

#### Circuit Design

 Designing a Preamp with Parallel Triodes "The biggest secret is that we use the dual triode of the 12AX7s in parallel." -Victor Mason, Mojave Ampworks Pentode Preamp Design: Part 1 Overwhelmed by all those pesky electrodes? Setting reasonable design constraints can save you a lot of frustration! Pentode Preamp Design: Part 2 A medical breakthrough - choosing the right screen voltage can cure anxiety over DC operating conditions once and for all! Pentode Preamp Design: Part 3 Fake news? How can a 1930s cathedral radio possibly be related to preamp AC operating conditions? We do a fact check!

#### Leo Fender

 Leo Fender's Circuit Layout Strategy A reexamination of the available evidence reveals possible motives behind many of Leo Fender's layout decisions. Designing Without Transistors Leo Fender and Jim Marshall never resorted to transistor-bloated digital calculators. We uncover the disturbing truth about 1960s number crunching.

#### Circuit Analysis

 Imaginary Numbers Stranded wire's effect on tone and profit from writing books about amp design are just two examples of imaginary numbers in our daily lives. Complex Impedance 70 years after Fender stopped producing the Harvard 5F10, we solve the mystery over the input filter's output voltage!
 Gabriel Cramer's Rule Don't get sucked into the trap of simple substitution! Cramer's rule can turn mathematical slop into an elegant solution you will be proud to show your friends. Pierre-Simon Laplace Frequency Response Plots Do you find yourself writing j times 2 times π times f, over and over again? Laplace has the solution - and you can use it for free!