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Designing
Power Supplies for Tube Amplifiers
Hardback, 233 pages.
RRP: £19, $31!
Where to buy:
Lulu.com
Doberman Music Products
Amazon.com
The power supply is the most important part of any audio amplifier.
Ultimately, everything you hear through the speaker begins life in the power supply, yet information on the design
of this part of the amp is patchy at best. Well, until now that is...
This book is the world's first comprehensive guide to the design of power supplies specially for valve equipment. If you have ever asked:
How do I choose a power transformer?
How much voltage does a valve rectifier really drop?
Do I need a standby switch?
Is there a better way to design a bias supply? How do I design a DC heater supply / high-voltage regulator / audio power control?
All these questions -and many more- are explored in detail
Not only is it a gold-mine of hard-to-find information on the more subtle nuances of design, but it comes with a
small price tag, too!
Synopsis:
Designing Power Supplies for Valve Amplifiers is a unique guide to the operation
and practical design of linear power supplies, especially for valve equipment.
Audiophiles, guitarists and general hobbyists alike will find this book an
invaluable source of detailed information on transformers, rectifiers,
smoothing, high-voltage series and shunt regulators, and much more.
Although
this book is not intended for the beginner, learning is encouraged through
practical design, and concepts are introduced at a basic level before the reader
is accelerated to the stage of high-performance design, with over 200 circuit
diagrams and figures. Numerous practical circuits are included, for high-voltage
stabilisers, heater regulators, optimised bias circuits, high-voltage supplies
using 'junk box' parts, and even audio power control for guitar amplifiers. An
essential handbook for any valve amplifier enthusiast!
Read the first chapter for free here.
View book contents here.
Errata:
On page 3, the equation for inductance should of course read: E=L di/dt.
Similarly for page 4.
In chapter 8 (bias supplies) there is an error in the
universal bias supply shown in fig. 8.1. The corrected circuit is shown below.
R3 allows C2 to discharge slowly at switch off, or when adjusting the bias pot. The time constant of C2*R3 might be set in the range of 1 to 3 seconds, say 10uF and 100k.
This correction should be applied to all other instances where the
discharge-reduction diode is shown (i.e, figs 8.2, 4, 10, 11 14). Apologies for
any confusion this may have caused!
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