Ron Bertrand from the Radio and Electronics School has just published a book
Radio Theory Handbook. Beginner to Advanced
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his book starts at beginner level, building the foundations of Electricity, AC Theory and Radio Theory. These foundations are progressively and slowly built upon and culminate at a solid Advanced Level. This is an ideal study program for those wanting an understanding electrical and radio theory. This study is suitable for Radio Technicians, Electrical Technicians, Technical Officers. Also suitable for those seeking to gain a qualification from Beginner to ‘Advanced’ Radio (Amateur) Experimenter; in any country. The book aims to provide a clear understanding of concepts.
The goal is learning rather than memorizing.
The book is available at Amazon. link below
https://www.amazon.com/Radio-Theory-Handbook-Beginner-Advanced/dp/1534696121