• Basic Electronics & Theory - metric prefixes - pico, micro, milli, centi, kilo, mega, giga, current, voltage, conductor, insulator, resistance, energy and power, open and short circuits, Ohm's law, series and parallel resistors, power law, resistor power dissipation, AC, sinewave, frequency, frequency units, decibels, inductance, capacitance, reactance, impedance, magnetics, transformers, resonance, tuned circuits, meters and measurements. (PDF file, opens in a separate window)

  • Electronics Assistant - Program that performs electronics-related calculations. It includes a resistor colour code calculator, resistance, capacitance and power calculations and more. (exe file, right click and save to disk)

  • Capacitors - capacitance, capacitor circuits, charge flow, charge, capacitance formula, charging through a resistor, discharging a capacitor. (PDF file, opens in a separate window)

  • Inductors - voltage, resistance, magnetic field, magnetic flux. (PDF file, opens in a separate window)

  • The Radio Handbook - complete, covering basic theory though practical construction of mostly ham radio equipment. Mostly applies to old, vacuum tube electronics. (PDF file, opens in a separate window)
Notice: Most of the resources on this page are hosted on remote servers. Most of them are copyrighted and may require a permission from the owner in order to use them other than for personal use. The majority of the materials comes from the Toronto Emergency Communications (EmComm) Group and is offered free of charge to all Radio Clubs, ARES Groups, and individuals in the interest of public safety and community service. Unless stated otherwise, this web page serves as a links database to the most valuable internet resources for ham radio enthusiasts.
Sample VFO circuit