Modern High-End Valve Amplifiers
based on toroidal output transformers
by Ir. Menno van der Veen
| Valve amplifiers are regarded by many to be
the ne plus ultra when it comes to processing audio signals. The combination
of classical technology and modern components has resulted in a revival
of the valve amplifier. The use of toroidal-core output transformers, developed
by the author over the past 15 years, has contributed to this revival. The
most remarkable features of these transformers are their extremely wide
frequency ranges and their very low levels of linear and nonlinear distortion.
The book explains the whys and wherefores of toroidal output transformers
at various technical levels, starting with elementary concepts and culminating
in complete mathematical descriptions. In all of this, the interactions
of the output valves, transformers and loudspeakers form the central theme.
Next come the practical aspects. The schematic diagram of a valve amplifier
often appears to be very simple at first glance, but anyone who has built
a modern valve amplifiers knows that a lot of critical details are hidden
behind this apparent symplicity. These are discussed extensively, in connection
with designs for amplifiers with output powers ranging from 10 to 100 watts.
Finaly, the author gives some attention to a number of special valve amplifiers,
and to the theory and practice of negative feedback. In summary, this book
offers innovative solutions for achieving perfect audio quality. Do-it-yourself
builders, as well as persons who want to gain a deeper technical understanding
of the complex world of audio transformers, valve amplifiers and audio signal
processing, will find this book a rich and useful source of information.
Nederlandse uitgave: Segment BV, Postbus 75, 6190 AB
Voordeel combinatiepakket: boek + Masterclass DVD
Deutschen Ausgabe: Elektor-Verlag, Aachen;