What is BT in Morse code?

BT is -...-, spoken as dah dit dit dit dah.

How should I learn BT in Morse code?

Listen to dah dit dit dit dah as one rhythm at 20 WPM rather than counting individual marks.

International Morse alphabet

BT in Morse code

BT separates sections of a message.

-...-dah dit dit dit dah

30 second sound drill

Listen to the complete rhythm. Do not count its parts.

Repetitions

Ready

Hear BT as one sound

At 20 WPM, the elements join into a recognizable audio shape. Farnsworth spacing leaves time after the complete character without changing that shape.