Science, Technology & Medicine

Cycles per second
(and kilocycles, megacycles, etc.)
Cycles per second
Cycles per second was an easy-to-understand measurement of the rate, or frequency, of audio and radio waves. It was renamed hertz (Hz) by international agreement in 1960, in honor of physicist Heinrich Hertz, with multiples kilohertz (kHz) and megahertz (MHz) replacing the KC and MC abbreviations previously found on radio dials. The new term was confusing to many at first, since the "per second" part was subsumed; you don't say hertz per second.

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There are 2 comments for this item.

Posted by CJ at 11:07 pm (PDT) on Fri October 3, 2014   
You have a good eye, packratjohn. I missed it until you pointed it out. :)
Posted by packratjohn at 2:00 pm (PST) on Mon November 7, 2011   
Notice the "Conelrad" markers on the dial, around 640 and 1240 if I recall.

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