Ham Radio School

DTMF, CTCSS, DCS, Tone Burst... What are they and which do you need for a given situation? Learn about the variety of signal tones.

Learn the differences among these operating modes and terms, and understand typical operating conditions for each.

Are you complying with the 2-meter band plan? Learn how to stick to the agreed plans on 2-meters and avoid interference.

T2C03 from the 2018-2022 Technician License Course Section 2.3, Call Signs: T2C03: What should be done when using voice modes to ensure...

A comparison of common ham radio coaxial cable types and signal loss.

The new solar cycle is crazy active! Learn why sunspots are of great interest to ham operators.

One way to work a lot of DX on a weekend is to participate in a DX contest on the high frequency bands. For example, the CQ Worldwide DX...

The 2020-2024 Extra License question pool wants to ensure you know a thing or two about operational amplifiers, an analog integrated...

Part 15 of Title 47 of the Code of Federal Regulations regulates low power, unlicensed devices that can cause interference on the ham...

The spectrum analyzer provides a frequency domain view of signals, while an oscilloscope displays the time domain. Learn the difference.

Ever wonder how that LCD on your radio works? Get the fundamentals on liquid crystal display functionality.

The 2019-2023 General License question pool asks about the inner workings of vacuum tubes used as amplifiers: G6A10: Which element of a...

The 2019-2023 General License question pool requires that you understand the purpose of a power supply bleeder resistor: G7A01: What...

The 2019-2023 General License question pool asks about the diameters of transformer windings, comparing primary to secondary: G5C16: Why...

The 2019-2023 General License question pool includes questions about the function of electrical transformers: G5C06: What is the RMS...

The 2019-2023 General License question pool asks about capacitive reactance: G5A06: How does a capacitor react to AC? A. As the frequency...

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...

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...

One of the more advanced topics in amateur radio electronics, and one that is often difficult for students to fully grasp, is complex...

Understand the basic science of semiconductor materials from which myriad electronic devices are made.