As the beginner gets more proficient at copying Morse Code, a point is reached wherein you can only push a pencil so fast, say 15-18 WPM. The brain automatically learns to recognize characters a whole words and you no longer need to write it down.
However increasing brain copying ability reaches a point where cleanly sent intercepted signals at a sufficient speed to increase your brain-copying ability are hard to find. Plus you have to contend with QRM, fading and receiver noise.
The best tool to send you pure cw at different speeds and word lengths has arrived! Check out Morse Camp.
You can easily set the speed, tone frequency, and word lengths. It starts set for 30 WPM which is comfortable for me.
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