Bob KØNR
Simplex, Duplex, Offset and Split
Learn the differences among these operating modes and terms, and understand typical operating conditions for each.
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Bob KØNR
Jan 22, 20226 min read
What Frequency Do I Use on 2 meters?
Learn how to stick to the voluntary band plans on 2-meters and avoid interference.
91,560
Stu WØSTU
Jan 20, 20223 min read
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...
7,776
Bob KØNR
Jan 18, 20223 min read
Hey, Which Coaxial Cable Should I Use?
A comparison of common ham radio coaxial cable types and signal loss.
84,878
Bob KØNR
Jan 16, 20224 min read
Working DX
Contest weekend? Learn common contest practices and how to snag DX stations.
3,042
Stu WØSTU
Jan 16, 20223 min read
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...
702
Stu WØSTU
Jan 16, 20222 min read
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...
482
Stu WØSTU
Jan 16, 20223 min read
Spectrum Analyzer (E4A02)
The spectrum analyzer provides a frequency domain view of signals, while an oscilloscope displays the time domain. Learn the difference.
1,712
Stu WØSTU
Jan 16, 20223 min read
Liquid Crystal Displays
Ever wonder how that LCD on your radio works? Get the fundamentals on liquid crystal display functionality.
619
Stu WØSTU
Jan 16, 20222 min read
Vacuum Tubes (G6A10)
Get amped up on vacuum tubes' structure and function with this question pool item.
1,667
Stu WØSTU
Jan 16, 20222 min read
Bleeder Resistors (G7A01)
The 2019-2023 General License question pool requires that you understand the purpose of a power supply bleeder resistor: G7A01: What...
507
Stu WØSTU
Jan 16, 20223 min read
Transformer Windings Diameters (G5C16)
Transform your understanding of transformers and their wire windings.
832
Stu WØSTU
Jan 16, 20223 min read
Transformers (G5C06)
The 2019-2023 General License question pool includes questions about the function of electrical transformers: G5C06: What is the RMS...
827
Stu WØSTU
Jan 15, 20223 min read
Capacitive Reactance (G5A06)
Understand the dynamics of capacitive reactance - how AC reacts to a capacitor.
728
Stu WØSTU
Jan 15, 202212 min read
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 signals, illustrated how AC voltage...
3,178
Stu WØSTU
Jan 15, 20228 min read
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 signals, illustrated how AC...
1,343
Stu WØSTU
Jan 15, 20229 min read
Complex Impedance Part 1: Just a Passing Phase
A 3-part examination of complex impedance.
2,446
Stu WØSTU
Jan 15, 20222 min read
Semiconductor Materials
Understand the basic science of semiconductor materials from which myriad electronic devices are made.
244
Stu WØSTU
Jan 15, 20223 min read
Power Calculation (G5B03)
Learn to calculate power use for DC circuits based upon voltage and load resistance.
1,655
Stu WØSTU
Jan 15, 20223 min read
RMS Voltage (G5B09)
The 2019-2023 General License question pool requires you to compute RMS voltage from peak voltage in an AC sine wave voltage: G5B09: What...
1,060
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