is not a new idea by any means, but when this method is understood in light of Mr. Erwood's article, it can provide a springboard for someone like me who is stuck at a good, but not yet 20 wpm speed to gain the extra few words to upgrade.
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Frank E. Wargocki, WA3AYW found K9AAU's short article ("A New System for Learning Morse Code," April, 1969) very interesting. archive 