Books

Guitar Amplifier Design: Tubes and Semiconductors Play Together is a look over the shoulder during the process of designing a unique guitar amplifier. Insights and opinions on design principles and best-practices for getting great tone in any design. Novel approaches and solutions to common circuit-design problems. Performance and tone improvements for common tube circuits. Explanations of cause-effect relationships that lead to better designs and better tone. Dr. Ulrich Neumann is a professor of Computer Science, with a joint appointment in Electrical Engineering, at the University of Southern California in Los Angeles. He completed a Bachelors and Masters degree in Electrical Engineering from the State University of New York at Buffalo and was granted a computer science Ph.D at the University of North Carolina at Chapel hill. His academic research relates to Computer Graphics and Computer Vision. He received an NSF CAREER award.

"Over 500 pages of all new material not found in my other books or anywhere else for that matter. Tons of empirical data that de-mystify the inner workings of tube amps to help you get the most from your amps!"

This book is a step-by-step tutorial for simulating vacuum tube guitar amplifiers using LTspice, a free SPICE-based electronic circuit simulator for Windows and macOS. The book walks you through the basics of developing a schematic, setting up a simulation, integrating vacuum tube models, and interpreting the results. From there it gradually ramps up to advanced topics, like verifying the sonic performance of a guitar amplifier as a complete system, analyzing the dynamics of overdrive, and writing new SPICE models for triodes and power tubes.

This book presents vacuum tube amplifier theory using modern, web-based design tools and computer visualizations to eliminate the usual litany of mathematical formulas. The book begins with the fundamentals of electronics and vacuum tubes. It then proceeds through each stage of a modern guitar amplifier, including preamp voltage amplification stages, cathode followers, tone stacks, power amps, phase inverters, and power supplies. The final chapter is devoted to the craft of controlling overdrive dynamics and harmonic distortion.

Radio Diagrams and Servicing Information from 1926 to 1938. Shows circuit diagrams for 600 of the most commonly found radios of that time. A valuable resource for restorations.