Freesound - "'ring-ring' in morse code.mp3" by Timbre
MORSE CODE. How to learn and make radio contacts: New step-by-step manual, from the basics, easily. By EA7HYD: González EA7HYD, David Gonzalez: 9781698906508: Amazon.com: Books
Stream Morse code.mp3 by NaRi Yoon | Listen online for free on SoundCloud
Morse Code Sound Effect | Free Sound Clips | Home and Office Sounds