Hams seem to be a curious lot otherwise why go through the trouble of learning about electronics. Books are rather expensive nowadays. There are 3 sites that are very interesting: IIT, MIT, and CIT. (Indian Institute of Technology, Massachusetts Institute of Technology, and California Institute of Technology) All 3 have free courses on the web that teach circuit theory, digital logic and far more. Especially check out IIT for electronics and digital logic! The electromagnetism course is super!
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