Bleeder Resistors (G7A01)
The 2019-2023 General License question pool requires that you understand the purpose of a power supply bleeder resistor: G7A01: What…
Vacuum Tubes (G6A10)
The 2023-2027 General License question pool asks about the inner workings of vacuum tubes used as amplifiers: G6A10: Which element…
Op Amps (E7G12)
The 2020-2024 Extra License question pool wants to ensure you know a thing or two about operational amplifiers, an analog…
Spectrum Analyzer (E4A02)
The 2020-2024 Extra License question pool asks you to identify characteristics of a spectrum analyzer, a common RF engineering signal…
Liquid Crystal Displays
Liquid-crystal display on Icom IC-7100 transceiver, incorporating touch screen controls. (Courtesy Icom America) If you have never seen a liquid-crystal…
Complex Impedance Part 1: Just a Passing Phase
One of the more advanced topics in amateur radio electronics, and one that is often difficult for students to fully…
Complex Impedance Part 2: Reacting Nicely!
In Part 1 of this series,It’s Just a Passing Phase, we defined the sine waveform of the most common AC…
Complex Impedance Part 3: Putting It All Together
In Part 1 of this series, Just a Passing Phase, we defined the sine waveform of the most common AC…
