TUT6 - The Ultimate Tone Vol. 6

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Product Code:
TUT6

Description

The Ultimate Tone Vol. 6 - Timeless Tone Built for the Future Today
 

By Kevin O'Connor, ©2008

ISBN 978-0-9781311-1-1

     312 pages
     404 figures (schematic diagrams) & tables
     8-1/2" x 11", spiral bound with clear protective covers

     View the Table of Contents
     Read a magazine review of the TUT series
 

"Timeless tone" is tone that has historic precedent and is still enjoyed today. That it speaks to us on many levels means such tone will be around forever. We apply advanced technology to tube guitar and instrument amplifiers to create refined, modern products for ourselves and for others, without losing what is essential to our constructions: tone. TUT6 builds upon the lessons of TUT4, delving deeper into discussions begun there, while introducing completely new topics.

Button to go to TUT6 table of contentsDC Power Scaling is detailed; its evolution and the many options it allows, including detailed operation of London Power's present and future DC Power Scaling kits. Lots of regulator circuits; voltage clamping; bias manipulation; circuit stabilization; quirks of technology and how to tame them. Fixed-bias, cathode-bias and switchable bias are dealt with, as are issues surrounding addition of extra Power Scale controls, automatic signal limiting, and circuit "tweaking" that allows complete optimization of performance.

Class-G tube amps are not something you'll find in any historic text. Now, you can build a 100W with waste heat like a 20W amp. Extend tube life without affecting tone. Huge dynamic headroom does not have to incur penalties of performance or high power consumption.

The Ultimate Tone Vol. 6 - open bookZ-B-X amps: how to get push-pull operation with a single tube. Revolutionary technology plus some less-than-revolutionary alternatives. The evolution of a design most people would consider impossible, but laid out with practical circuits good enough for hifi.

The basics of Dumble amps. Why certain things were done in certain ways, and why we should change some and leave others alone. There were many variations in Howard's designs but some key points were common to all. We dig through the hype and reveal the essence of design.

The 400W amp craze: how to design a big amp. Really, a tutorial on output stage design taken to an extreme, looking at different tube types as well as loading and voltage environments. Plus, the impact each output stage choice has on our power supply, chassis and layout. Common tube types are considered, along with some less common types, including: 6CA7, 6L6, 6V6, 5881, 6550, EL-34, KT-66, KT-77, KT-88, KT-90, 811A, 572B, 845, EL-509, 3CX300 and 4CX250.

Which TUT Book to Get First? - buttonSustain: How to enhance the sustain of notes both through the output stage and other voltage-amplifying stages. A continuation of the "Sag" chapter of TUT4 but using the "DC-style" of the DC Power Scale circuits. Circuit methods with non-critical components is emphasized.

AC Mains Control: Filtering, range selection both manual and automated, inrush current limiting, DC blocking - yes, "DC" on the mains! See why big manufacturers don't just use a "power switch" anymore.

More Gain: The evolution of high-gain preamps and how to control their noise, sustain, compression and basic tone. From the 800, to Recto and SLO, see what is important and what is not.

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About London Power

London Power was founded in 1990 by Kevin O'Connor, after two decades of research into innovative audio amplification techniques. Kevin is an audio designer, author and speaker, known for his proprietary methodology called Power Scaling, and for his eleven books on audio subjects. Whether you seek amps, kits or information, you'll find useful answers here on not just the "how" but the "why" of audio amplifier design. Please enjoy the information on this site, and don't hesitate to contact us with questions.

Contact Us

(807) 473-0952
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amps@londonpower.com
PO Box 10012, Thunder Bay, ON P7B 6T6 CANADA