You can operate for years without this material and many people do. It is also what turns the hobby into an education: the difference between owning a radio and understanding a system.
Technical topics
How and why the radio works.
In this section
- Propagation Why signals travel further at night, and how to predict it.
- Electronics basics The handful of formulas you actually need.
- Modulation and modes AM, FM, SSB, CW and what the differences cost.
- Antenna theory Gain, patterns, polarisation and matching.
- Space weather Solar flux, sunspots, the A and K indices, and what they mean for your next contact.
Last updated Aug 27, 2026. Page history · Sign in to edit