Quick and Easy Cheat Sheet to Learn How to Operate a Ham Radio

David Trammel's picture

Mark Adams wrote this guide to getting started in HAM radio.


Interesting charts.

lathechuck's picture

One chart that I've never seen anyone else (besides myself) develop is the potential number of communication channels per band. If we were so coordinated, we could put one SSB phone channel every 3 kHz. For any region covered by a typical radio, that determines (more-or-less) the number of simultaneous non-interfering conversations. So, assuming that either everyone has an Extra license (for simplicity), how many users can the HF ham bands support?
160m: 66; 80m: 133; 40m: 58; 20m: 66; 17m: 19; 15m: 83, 12m: 20, and 10m: 466.
When you compare the number of licenses against the number of available channels, it's amazing that there isn't more congestion. Bear in mind that not all of these bands are effective for communications, depending on the time of day, time of year, and phase of the sunspot cycle. In an emergency, if everyone who could, tried to talk at the same time, it would be a Tower of Babble.