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…
Capacitive Reactance (G5A06)
The 2019-2023 General License question pool asks about capacitive reactance: G5A06: How does a capacitor react to AC? A. As…
RMS Voltage (G5B09)
The 2023-2027 General License question pool requires you to compute RMS voltage from peak voltage in an AC sine wave…
Automatic Repeat Query (G8C07)
The 2019-2023 General License question pool touches on the digital mode concept of the automatic repeat query, or ARQ: G8C07:…
PSK31 Varicode (G8C08)
The 2019-2023 General License question pools includes a question about the type of encoding used with the PSK31 digital mode:…
