Valve amp theory

Valve amp theory

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How valve amps work
Distributed loading
Transformer design
Triode-mode pentodes
Regulated power supplies

Since I've been working with valve-based electronics for several years now, it's high time that I started putting some of the stuff I've learned down in writing. This section therefore includes (lengthy!) articles on:

bulletHow valve amps work, which introduces valve-based electronics and explains the principles behind valve rectifiers, gain stages, output stages, and so on. It's also packed with worked examples.
bulletTransformer design, which is about the design of audio transformers. This will eventually have some hands-on construction notes to complement the design section.
bulletRegulated power supplies, which explains the different kinds of active valve regulators in use. Complete with some tried-and-tested schematics.
bulletDistributed loading, my notorious article on how and why we use unusual output stages like ultra-linear, the Quad acoustical, and pure cathode followers.
bulletTriode-mode pentodes, which explains why, and how, we often turn valves like the KT66 or EL34 into 'triodes'.

As always, just e-mail me at griffon@ntlworld.com if you've got any questions.