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THE R-S-T SYSTEM (Signal Reporting System)


READABILITY

  1. - Unreadable.
  2. - Barely readable, occasional words distinguisbable.
  3. - Readable with considerable difficulty.
  4. - Readable with practically no difficulty.
  5. - Perfectly readable.

SIGNAL STRENGTH

  1. - Faint signals, barely perceptible.
  2. - Very weak signals.
  3. - Weak signals.
  4. - Fair signals.
  5. - Fairly good signals.
  6. - Good signals.
  7. - Moderately strong signals.
  8. - Strong signals.
  9. - Extremely strong signals.

TONE

  1. - Sixty cycle a.c. or less, very rough and broad.
  2. - Very rough a.c., very harsh and broad.
  3. - Rough a.c. tone, rectified but not filtered.
  4. - Rough note, some trace of filtering.
  5. - Filtered rectified a.c. but strongly ripple-modulated.
  6. - Filtered tone, definite trace of ripple modulation.
  7. - Near pure tone, trace of ripple modulation.
  8. - Near perfect tone, slight trace of modulation.
  9. - Perfect tone, no trace of ripple or modulation of any kind.
If the signal has the characteristic steadiness of crystal control, add the letter X to the RST report. If there is a chirp, the letter C may be added to so indicate. Similarly for a click, add K. The above reporting system is used on both CW and Voice, leaving out the "tone" report on voice.
Be honest in your reporting. Don't just tell tell everyone their signal is 5-9. They want to know as you do what the signal really is.