Operational Amplifiers: Basic Building Blocks
Get the basics on op amps, how they work to amplify signals.
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Stu WØSTU
Variable Propagation Conditions (G3A10)
Understand more about the solar variables that impact HF long-distance signal propagation.
504 views
Stu WØSTU
Sunspots and Propagation
Solar cycle 25 is over-performing! Learn why sunspots are of great interest to ham operators.
8,906 views
Stu WØSTU
Chordal Hop Propagation
Understand how efficient ionospheric skip can occur without ground reflection.
1,182 views
Bob KØNR
Intro to Digital Voice
DSTAR, DMR, System Fusion... Get some clarity on digital voice modes.
1,547 views
Stu WØSTU
Field Day Weekend! What's it all about?
It's Field Day weekend! Find your local field day event and have fun with hams. Here's what it's all about.
444 views
Bob KØNR
Get the Right Signal Tone
DTMF, CTCSS, DCS, Tone Burst... What are they and which do you need for a given situation? Learn about the variety of signal tones.
13,387 views
Bob KØNR
Simplex, Duplex, Offset and Split
Learn the differences among these operating modes and terms, and understand typical operating conditions for each.
13,755 views
Bob KØNR
What Frequency Do I Use on 2 meters?
Learn how to stick to the voluntary band plans on 2-meters and avoid interference.
45,534 views
Stu WØSTU
Standard Phonetic Alphabet (T2C03)
T2C03 from the 2018-2022 Technician License Course Section 2.3, Call Signs: T2C03: What should be done when using voice modes to ensure...
4,879 views
Bob KØNR
Hey, Which Coaxial Cable Should I Use?
A comparison of common ham radio coaxial cable types and signal loss.
36,457 views
Bob KØNR
Working DX
Contest weekend? Learn common contest practices and how to snag DX stations.
1,446 views
Stu WØSTU
Op Amps (E7G12)
The 2020-2024 Extra License question pool wants to ensure you know a thing or two about operational amplifiers, an analog integrated...
350 views
Stu WØSTU
Part 15 Devices
Part 15 of Title 47 of the Code of Federal Regulations regulates low power, unlicensed devices that can cause interference on the ham...
284 views
Stu WØSTU
Spectrum Analyzer (E4A02)
The spectrum analyzer provides a frequency domain view of signals, while an oscilloscope displays the time domain. Learn the difference.
934 views
Stu WØSTU
Liquid Crystal Displays
Ever wonder how that LCD on your radio works? Get the fundamentals on liquid crystal display functionality.
297 views
Stu WØSTU
Vacuum Tubes (G6A10)
Get amped up on vacuum tubes' structure and function with this question pool item.
859 views
Stu WØSTU
Bleeder Resistors (G7A01)
The 2019-2023 General License question pool requires that you understand the purpose of a power supply bleeder resistor: G7A01: What...
243 views
Stu WØSTU
Transformer Windings Diameters (G5C16)
Transform your understanding of transformers and their wire windings.
457 views
Stu WØSTU
Transformers (G5C06)
The 2019-2023 General License question pool includes questions about the function of electrical transformers: G5C06: What is the RMS...
446 views
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