Morse (CW) Receiver
Decode Morse code
What it does
SimpleMorse code is a secret-sounding language made of short beeps (dots) and long beeps (dashes). Each letter has its own little pattern — for example, three dots is 'S' and three dashes is 'O', which together spell the famous 'SOS'.
This app listens to the beeps and turns them into normal letters on the screen, so you can read what the beeps are saying without having to memorise the whole code yourself.
How it works
SimpleA dot is a short beep and a dash is a beep three times longer. The gaps matter too: a small gap separates letters, a bigger gap separates words. The app measures how long each beep and each silence lasts, figures out which are dots, dashes, and gaps, and looks up the letter for each pattern.
How to use it, step by step
Simple- Open the 'Morse RX' app.
- Find a beeping Morse signal (the ham HF bands are full of them).
- Tune until the beeps are clear.
- Watch the beeps turn into letters on the screen.
Examples
Decode a slow practice beacon and check it against your own Morse reading.
Find an automated CW beacon that repeats its callsign and see the decoder nail it every cycle.
Compare a slow 5 WPM sender with a fast 25 WPM operator and watch the adaptive timing keep up.
Tips & things to try
- Hand-sent Morse has 'personality' (uneven timing) that's harder to decode than machine-sent — try beacons first.
- A narrow bandwidth setting helps pull weak CW out of the noise.
- Learning the most common letters (E, T, A) by ear alongside the decoder speeds up your own reading.