K in Morse Code

Why K matters

K is the first letter most learners encounter in the Koch method, paired with M. Its symmetrical dash-dot-dash pattern is easy to distinguish from M's two dashes. K is also a common ham radio prosign for 'go ahead, it's your turn to transmit.'

Memorization tip

“DAH-di-DAH” — long, short, long. The first letter Koch students learn.

Common English words starting with K

• know → translate
• keep → translate
• kind → translate
• key → translate
• kid → translate

Where this letter appears in the ITU alphabet

The full A–Z chart shows every letter side-by-side so you can see the pattern of dots and dashes. For just the numbers, see morse code numbers 0–9. For a printable version, the chart page combines letters, digits, and punctuation in one layout.

The history of K

K comes from the Phoenician kaph, meaning palm of the hand, drawn as a stylised open hand. The Greeks adopted it as kappa, but the Romans largely abandoned it in favor of C for the /k/ sound — which is why K is rare in Latin-derived English vocabulary. The letter survived in Germanic loanwords ('king', 'kin', 'know') and was reinforced by later borrowings from Greek and Slavic languages. It joined English's regular alphabet relatively late in its written tradition.

K in CW operating

K is one of the most important prosigns in international CW: a single K sent at the end of a transmission means 'go ahead, your turn to transmit'. It is the universal hand-off between two operators in a QSO. The variant KN means 'go ahead, only you' — used to politely exclude a third operator who might be waiting to break in. Hearing K is your cue to key up.

What position 22 means in practice

K at position 22 with 0.8% frequency is rare in literary English — about one K every one hundred and twenty characters — but enormously over-represented in CW because of its prosign role. Every time an operator finishes a transmission and hands the conversation back, they send a single K. In a typical fifteen-minute QSO you might hear K several dozen times in that prosign role, plus a few more inside callsigns and the occasional native English K-word. This is one of the rare cases where operational frequency is an order of magnitude above written frequency, which is why K is the very first letter taught.

How to drill it

K and M (two dashes) are the canonical Koch starter pair — the entire method begins with these two letters at full target speed. K is dah-di-dah, M is dah-dah. The middle dot in K is the only difference. Drill them at 20 WPM character speed from minute one and your ear will lock the contrast permanently.

Most-confused with: C, R, Y — drill them together.

Sample copy: “Kate keeps a key for the kitchen.”