Why 7 is interesting
Seven is a particularly common digit in amateur radio because “73” is the universal sign-off for “best regards.” You'll hear --... ...-- at the end of almost every CW QSO.
Cultural and numerical context
Seven is two dashes, three dots. Common in ham-radio sign-offs (“73” = best regards).
The ham radio cut-number alias
At fast contest speeds, operators abbreviate digit 7 with the letter G. The morse for G is shorter than the morse for 7, saving fractions of a second per character. Over a 24-hour contest with thousands of exchanges, that adds up to meaningful speed gains.
All ten digits at a glance
See the full numbers explainer for why every digit is five elements, or the alphabet for letter codes.
Frequently asked questions
What is the number 7 in morse code?
The digit 7 in international morse code is "--..." — a five-element pattern like every other digit.
Why is every morse digit five elements long?
Digits in morse have a uniform length to make them easier to recognize by ear at high speed. Letters vary in length by English frequency, but digits appear in any context so they get a consistent five-pulse shape.
What's the cut-number alias for 7?
At high contest speeds, operators abbreviate 7 with the letter G, which is shorter in morse. This is called cut-number shorthand and is context-specific to fast CW operation.