Quadrature Modulation
In the world of amateur radio, we use a variety of modulation schemes to encode our voice or digital data…
Advanced Topics (24)
Power and Phase
The Technician and General license exams emphasize the concept of impedance matching to achieve maximum power transfer. This is often…
Intro to Digital Voice
Ham radio on the VHF and UHF bands has been dominated by Frequency Modulation (FM), an analog mode invented in…
Transformers (G5C06)
The 2019-2023 General License question pool includes questions about the function of electrical transformers: G5C06: What is the RMS voltage…
Transformer Windings Diameters (G5C16)
The 2019-2023 General License question pool asks about the diameters of transformer windings, comparing primary to secondary: G5C16: Why is…
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…
