B. RST Reporting

Amateurs report on each other’s signal strengths by using the RST system. R stands for readability, S stands for strength and T stands for purity of tone.

Readability

1 - unreadable

2 - barely readable

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

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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 tone, some trace of filtering

5 - filtered, rectified a.c. but ripple-modulated

6 - filtered tone, definite trace of ripple

7 - near perfect tone, slight trace of modulation

8 - near perfect tone

9 - pure tone

Amateur courtesy:

Report his/her RST first before asking for your RST.

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