amplifiers

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Ancient Web: W8JI Turned a Ham Shack Into an RF Engineering Textbook

W8JI.com is a dense amateur-radio engineering archive covering antennas, amplifiers, baluns, tubes, transmission lines, common-mode current, receiver problems, RF measurements, grounding, noise, and the myths that grow around all of them.

Ancient Web: Australian Valve Amps Is Part Repair Bench, Part History Book

Australian Valve Amps has spent more than twenty years documenting Australian and New Zealand guitar and PA amplifiers with circuits, photographs, repair notes, safety guidance, oddities, and hand-coded HTML.