Plain-language answer: RST reports describe readability, signal strength, and—for CW—tone using a compact numerical system.
Why it matters in the field
Readability and strength are operator observations, not calibrated lab measurements; tone applies to keyed signals and should not be appended mechanically to voice reports.
What to do
Give a useful report that reflects what you actually hear, and add plain-language details when fading, noise, or audio quality matters.
The common mistake
Sending 59 automatically when a truthful report would help the other operator.
Field boundary
Current regulations, safety clearances, equipment manuals, exact antenna geometry, and site conditions control. Test the complete installed system at low power before relying on it.
