CW Sender Pro is an interactive Morse code trainer that helps you master CW (Continuous Wave) transmission. The tool offers multiple game modes, from structured learning to specialized practice.
💡 Tip: The interface shows your current mode in the sidebar. Look for the icon and name to know which mode you're in!
The Koch Method is a proven technique for learning Morse code that introduces letters gradually in a specific order based on their distinctiveness and usefulness.
💡 Why this order? The Koch sequence starts with very distinct letters and gradually adds more similar-sounding ones, making it easier to build pattern recognition.
Once you've mastered some letters through the Koch Method, use these practice modes to reinforce specific skills and patterns.
Practice common two-letter combinations that appear frequently in English and ham radio: TH, CH, ST, QU, etc. This builds fluency with letter transitions and helps you recognize common patterns quickly.
Practice realistic amateur radio callsigns like M0ICR, W1AW, K3LR. Mixes letters and numbers in formats used worldwide. Perfect for preparing for on-air operation. Callsigns follow standard patterns: prefix (1-2 letters/numbers) + region number + suffix (1-3 letters).
Learn essential ham radio Q-codes used in CW contacts:
• QTH = Your location
• QSL = I confirm receipt
• QRZ = Who is calling me?
• QRM = I am being interfered with
• QSB = Your signals are fading
These are vital for real-world CW operation.
Master special prosigns (procedural signals) sent as single characters without spacing:
• AR = End of message
• SK = End of contact
• BT = Break/separator
• KN = Go ahead, specific station only
These are sent as continuous sequences and have unique sounds.
Focus exclusively on digits 0-9. Essential for signal reports (599, 579), frequencies, times, and serial numbers in contests. Numbers in Morse are 5 elements each, making them longer than most letters.
Practice frequently used CW words and abbreviations: THE, AND, CQ (calling any station), DE (from/this is), RST (signal report), etc. Building automaticity with these makes real contacts much easier.
Challenge Mode! The character is displayed for only 1 second, then disappears. Forces you to rely purely on the audio pattern rather than visual reference. This simulates real-world conditions where you must decode by ear.
Enter any string of characters you want to practice (letters, numbers, or symbols). Perfect for drilling specific problem characters or practicing your own callsign repeatedly. No scoring - just pure practice.
The sidebar always shows your current mode with three clear indicators:
Click the "🎮 Choose Game Mode" button anytime to switch between modes. Your active selection is highlighted in the modal.