Books & DVDs
by Kevin O'ConnorThis is the book that jump-started the boutique tube guitar amp business. Learn the truth about tube preamp design and modification; see how tube power amps work and can be made more reliable; see how reverbs and effects loops work and better ways to configure them; learn why some amp brands are easier to service and to mod than others; see how simple switching circuits are but how capable they can be. Tube data for the common types used in guitar and bass amps is provided, along with a discussion of stage set-up and player ergonomics.
Spiral bound, 395 figures. 368 pages, 2.5 lbs, 8.5" x 11"
by Kevin O'ConnorHave you ever wondered if there is a better way to build a Bassman, Champ, Plexi, an 800, AC-30, Bulldog or Portaflex? Or you wanted to build an SVT with off-the-shelf parts? How about a master-volume amp that doesn't change tone with the master setting? Everything you need to know is right here, including: proper grounding techniques, wiring methods, and mechanical considerations. Eighteen chapters cover the "iconic" amps everyone knows and loves, with schematics and layouts for each, along with the technical history of the product.
by Richard KuehnelA comprehensive manual for designing power amps and phase inverters from scratch, this book provides the engineering details that professional amp builders need to create new circuits. To determine how component values effect the dynamics of an overdriven power stage, the author includes full blown studies of grid bias excursion, power supply sag and negative feedback effects.
Softbound, 376 pages, 1.7 lbs
by Kevin O'ConnorReady Set Go! An Electronics Reference for the Everyman
By Kevin O'Connor
A handy reference for the novice electronic tinkerer and experienced craftsman alike. Informative and easy to read, the book explains: how to read schematic symbols; explains standard notation, S.I.
by M. N. BeitmainRadio 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.
by Richard KuehnelVacuum Tube Circuit Design: Guitar Amplifier Preamps
By Richard Kuehnel
Written for experienced builders who want to design their own circuits from the ground up, this book presents a comprehensive study of triode and pentode preamp design. From the impedance characteristics of the guitar pickup, to the Miller capacitance at the second-stage tube grid, the author describes how to manipulate frequency response and control the dynamics of nonlinear distortion.
Softbound, 223 pages, 1.1lbs
by Richard KuehnelThe Fender Bassman 5F6-A
Circuit Analysis of a Legendary Tube Amplifier
By Richard Kuehnel
Guitar amplifier designers have tweaked, enhanced, or occasionally just copied the Bassman's push-pull class AB design for decades. This advanced book conducts an in-depth analysis of the 1959 model 5F6A, considered by many to be the Bassman at its very best. Step-by-step the author presents all the graphs and formulas a Bassman-inspired circuit designer could ever want.
220 pages, 1.1 lbs
by Kevin O'ConnorPrinciples of Power
A Practical Guide to Tube Power Amplifier Design
By Kevin O'Connor
Offers a simplified method for designing tube power amps for audio. Tube operation is explained, as are circuit principles. Class-A or B, cathode, fixed bias, and push-pull and single-ended designs are covered, as are many front-end circuits. Includes designs using off-the-shelf transformers and current production tubes. Power outputs of 15 to 400W are depicted using pentodes and true triodes. Also, covers power supplies, selected tube data, and information on Hammond and Plitron transformers.
by Kevin O'ConnorEvery part of your system contributes to your Ultimate Tone, so every part is important. TUT5 delineates, in clear language, the function of each electronic component in a circuit, and how alterations to the value of each part affect the final sound. Gain stage voicing, interstage attenuator optimization, sustain restoration for clean and distorted tones, power amp and preamp "tone generators", simple boost pedals, amp selectors and power conditioners are all covered, with designs using off-the-shelf parts.
by Kevin O'ConnorA collection of projects for electric guitar and bass players. Save money by building your own acoustic preamp; build a two-channel tube preamp for guitar, and more. Construct a 15W tube power amp or a true class-A solid state amp. The "experimenters power supply" is excellent for tinkering with tube circuits, containing separate AC heater, DC heater plate and bias supplies. Build a wide range tremolo circuit and an all-tube reverb unit. Circuit operation, construction, & layout guidelines are provided. Every project uses easy to find parts.
105 pages, 1.0 lb, 8.25" x 11"
by Kevin O'ConnorThe achievement of great, live sound is the premise used to explore modern high-gain guitar pre-amps, proper treatment of acoustic instruments, tube vocal PAs; dynamic bass gear, all types of tube, semi, hybrid and alternative power amplifier design, power supply mods that are "toneful", simple switching methods, speaker cabinet design, getting the most from effects loops and chains, and, modular stage monitoring systems that work!
Spiral bound. 200 figures. 250 pages, 1.9 lbs.
by Kevin O'ConnorOutlines, in schematic form, many approaches that achieve the goal of power scaling, super scaling and power management. A complete history and discourse on the technology outlines how to implement multiple power scale controls, alternative circuit forms and system impacts. Further tutorials outline the methods for super scaling, with both fixed and variable boost ratios, using both solid-state and tube methods.
by Kevin O'ConnorThe evolution of guitar amp circuits becomes a revolution! TUT6 takes you through advanced DC Power Scaling methods; reveals the secrets of Dumble amps; explores the truth about high-gain preamps; demonstrates how to build Z-B-X push-pull power amps with a single power tube; simplifies the design of 400W+ tube amps - methods that can be applied to any power level; presents class-G tube amps where 100W of output has the same waste heat as a 25W amp; explores modern mains control and sustain circuitry.
312 Pages, 404 figures, spiral bound, 9" x 11"