Telegraph key

A telegraph key, clacker, tapper or morse key is a specialized electrical switch used by a trained operator to transmit text messages in Morse code in a telegraphy system. Keys are used in all forms of electrical telegraph systems, including landline telegraphy and radio telegraphy. An operator uses the telegraph key to send electrical pulses of two different lengths: short pulses, called dots or dits, and longer pulses, called dashes or dahs.

These pulses encode the letters and other characters that spell out the message.

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Source: Wikipedia · Image: Wikimedia Commons · Public domain

DITDASH

Dit dah — Morse code, signaling, and the basics of getting on the air.

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