This site offers free tutorials about amplifiers, oscillators, ham radio, filters, power supply, transmitters, receivers, and radio and electronics design as well as basic electronics (Ohm's Law, voltage, resistivity, etc.). The topical pages provide fairly non-technical, clear text with hyperlinks to related topics, schematics, and formulae. For example, the tutorial page for Small Signal Amplifiers has circuit schematics of AC/DC and class A amplifiers, equations for R and Z, and links to pages on Ohm's Law, resistant current, resonant circuit, emitter degeneration, and broad band amplifiers. The "Basics" tutorials each give definitions, formulae, and examples for each of nineteen general electronics terms. Links to equipment specifications for selected amplifiers and receivers, a free monthly newsletter, and a recommended book list (note: takes user to Amazon.com) are also featured. The site's administrator is electronics buff Ian Purdie, a licensed radio amateur and former college instructor.


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