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QST was nice enough to print my idea for using narrow CW filters when operating PSK31. I wrote this in response to a Hints & Kinks that appeared in April 2002 QST. I sent a copy to the author of that article, and also copied the H/K editor. The editor thought it would be a good entry for the column, so here it is.

This is scanned and reprinted here with permission from January 2003 QST; copyright ARRL.

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