Koch Method Morse Practice
Last verified: August 2026. Indexable lessons cover the first eight steps; the live course is the trainer.
Ludwig Koch’s approach (popularized for radio Morse in the 1930s) is simple: send characters at the speed you eventually want to copy, and grow the alphabet only when accuracy is high. Slowing characters to “count the dits” trains a habit that collapses above about 10 WPM.
MorseCoder’s trainer follows a 36-character Koch order starting with K and M at 20 WPM character speed. That is practice software in a browser, not a substitute for on-air mentoring.
Pair Koch with Farnsworth spacing if you need extra time between letters while keeping character speed honest. Comparison: Farnsworth vs Koch.
Character timing on this site follows ITU-R M.1677-1 ratios in the Web Audio engine. That is practice tone, not a certified measurement instrument, but it matches what most examiners expect when they describe “20 WPM character speed with Farnsworth gaps.”
Each lesson page below explains why a new letter enters the set, what it sounds like compared with earlier letters, copy drills, pitfalls, and a shareable trainer URL. Read lesson 1 even if you have prior chart study — Koch assumes you will not count dots at target speed.
Licensed amateurs often continue Koch-style drills on nets listed by the ARRL. Wikipedia’s Morse code article links historical primary sources if you are comparing telegraph classroom methods with modern software trainers.
Lessons 1–8
- Koch Lesson 1: Characters K and M
Start Koch Morse with K (-.-) and M (--) sent at full character speed. Why this pair, how they sound, and a shareable trainer link.
- Koch Lesson 2: Add the Letter R
Koch lesson 2 adds R (.-.) to K and M. Hear how R is the dit-framed inverse of K, then open the trainer at lesson 2.
- Koch Lesson 3: Add the Letter S
Koch lesson 3 adds S (...). Contrast three dits with M’s two dahs, then practice the four-letter set in the live trainer.
- Koch Lesson 4: Add the Letter U
Koch lesson 4 adds U (..-). Tell it apart from S (...) by the closing dah, then open a shareable five-character session.
- Koch Lesson 5: Add the Letter A
Koch lesson 5 adds A (.-), a high-frequency English letter. Contrast it with R and U, then share a six-character Koch room.
- Koch Lesson 6: Add the Letter P
Koch lesson 6 adds P (.--.), the first four-element letter in this course. Hear the palindrome, then train the seven-letter set.
- Koch Lesson 7: Add the Letter T
Koch lesson 7 adds T (-), the single-dah letter. Contrast it with M, then open an eight-character shareable session.
- Koch Lesson 8: Add the Letter L
Koch lesson 8 adds L (.-..). Build it from A plus two dits, finish the first eight indexable lessons, then continue in the trainer.
Lessons 9–36 (O through X in this order) stay in-app so we do not ship dozens of near-identical pages.
FAQ
When the first lessons feel steady, keep going in the practice trainer. Teachers sometimes pair this course with Morse code for kids, and makers check names on the bracelet and necklace pages before they order beads.