Transformers for Tube Amplifiers : Career Professionals : 9780980622386 : 0980622387 : 12 Mar 2018 : The only practical audio transformer design & construction manual in English language The design of chokes, small power transformers (those used in tube amplifiers and preamplifiers) and audio (output and interstage) transformers is such a specialist topic that even most electronics engineers would not even know how and where to start, let alone produce a finished, working transformer. Commercial transformers and chokes are available, but most are very expensive, and those that are reasonably priced usually aren't of best quality. Plus, since they are such heavy and bulky components, international postage or courier costs are significant. The physical principles behind transformer operation are quite complex and mathematical modeling of transformers require strong mathematical skills, deterring amateurs and DIY enthusiasts from studying the subject. While some basic understanding of