Prosign · CW procedural signal
SK prosign in Morse code
Closes the QSO. The most-sent prosign on amateur CW.
Morse pattern
...-.-
Sent as one continuous shape — no inter-letter gap between the component letters.
Meaning
SK — End of contact
Notation
Written SK (joined). Sometimes called 'VA' in older European references.
When this is used
Sent right before 73 or as 73 SK. Indicates the contact itself is over, though the station may stay on the air for more QSOs. CL is stronger (station closing).
Examples
| On the air | Plain English |
|---|---|
| 73 SK | Best regards, end of contact. |
| TNX QSO 73 SK W1AW | Thanks, 73, end of contact, W1AW signing. |
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