Ham Radio School

Learn how the features of coaxial cable feedlines impact signal losses.

How does SWR indicate antenna performance and resonance?

Learn fundamentals of Standing Wave Ratio (SWR), and what represents a good SWR value.

Resonance - An intuitive way to think about the relationship between your transmitter and your antenna.

The Technician question pool (2022-2026) asks you to identify FM bandwidth: T8A09: What is the approximate bandwidth of a VHF repeater FM...

All about single sideband. Learn how SSB mode is different from FM or other voice modes. Why is it so popular?

Technician question pool item T4B09 (2018-2022) raises the issue of filters for receiving single sideband signals: T4B09: Which of the...

Analog heterodyne receivers use frequency mixing to recover the modulating audio signal. Learn more.

Recently, I was talking with a new ham about a problem he was experiencing when trying to “tune up” his transmitter. While operating SSB...

A question in the 2019-2023 General License question pool inquires about the advantages of SSB on the HF bands. This question is similar...

A previous Technician question pool item inquired about using a multimode transceiver for weak-signal communications on the VHF bands,...

What phenomenon can get your Technician signals over the horizon? Sporadic E may be coming your way.

The technician question pool (2018-2022) item T3B11 asks: What is the approximate velocity of a radio wave as it travels through free...

Tips for operating a tactical net. Learn how to be efficient on the air.

Learn how FM repeaters work. Offsets, CTCSS tones, duplexers, controllers and more.

Get up to speed on repeater offsets and how to find settings for repeaters.

First comes the furrowed brows. Then perhaps a frown or two. At last, a hesitant hand goes up. “I don’t get this whole mode thing.” “Yea,...

How is the Technician License exam structured? How does this impact my studies? Learn more for the 2022-2026 exams!

With a Technician License, you can communicate by low earth orbit satellites. Learn how.

Learn how to adjust a simple dipole antenna for the desired operating band.