Op Amps (E7G12)
The 2020-2024 Extra License question pool wants to ensure you know a thing or two about operational amplifiers, an analog…
Advanced Topics (25)
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…
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:…
DX Techniques (E3A06)
The 2020-2024 Extra License question pool asks a deep question about DX techniques requiring some good knowledge of propagation science:…
