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Callsign Sprint

Copy 50 Morse callsigns that speed up as you get them right and slow down when you miss. RufzXP style, in your browser. How fast can you go?

Callsign
–
Speed
20 WPM
Score
0
Best
–

50 callsigns, each sent once. Type it and press Enter. Right speeds up the next one, wrong slows it down. Hearing one again halves its points.

Start at

How it works

Speed that follows you.

  1. A callsign, once

    Each of 50 callsigns is sent once at the current speed.

  2. Type and log it

    Right, and the next comes faster; wrong, and it slows down.

  3. Score

    Points grow with speed and length; hearing it again halves them.

Tips

  • Real callsignsPrefixes from around the world, as heard on the air and in contests.
  • Hear it again sparinglyIt halves the points, but beats a miss that slows you down.
  • Start a bit lowThe speed climbs fast: start 5 WPM below your comfortable speed.
  • Copy in your headType after the whole callsign, not letter by letter as it plays.
  • Beat your bestYour best score is kept on this device.
  • Every letter countsEach letter goes into your accuracy and the daily review.

Frequently asked questions

About the callsign sprint

A classic callsign-copying trainer for radio amateurs: 50 callsigns, with the speed rising after each right answer and falling after a miss. This sprint follows the same idea in your browser.

Each callsign copied right scores its length times the speed, divided by 10, rounded to tens. Hearing it again halves that. Misses score nothing and slow the next callsign down.

A little under the speed you copy comfortably. The sprint speeds up by about 4% after each right callsign.