For those with interest I just put up a video comparison of a standard "communications speaker" vs. the "CW Resonant Speaker" detailed in the article of the same name in the February 2017 QST, page 43.

Included for Elecraft KX product owners is the amp necessary to use the headphone jack output.


Click on:  https://www.youtube.com/watch?v=htjgeHEf3-g


73, Stan WB2LQF
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