[CW] WPM

[Henry Mei'l's]

Thanks for the info. (Now I know why "Morse" wasn't chosen.)

73
Henry F M 
  ----- Original Message ----- 
  From: D.J.J. Ring, Jr. 
  To: CW Reflector 
  Sent: Sunday, January 09, 2011 10:42 PM
  Subject: [CW] WPM


  What is the standard for Words Per Minute in Morse?  PARIS including the word space, or 25 dots and intercharacter spaces.  The ITU settled on a number of 50 baud where baud was the fundamental transmission element which is the shortest time element in the transmission.  This in Morse code is equal to the length of the dot, and the length of the dot is also equal to the length of the space between characters, which is called the "Intercharacter space".  A word space is seven baud.  Since a sent dot requires a dot space, a string of twenty five dots has twenty five intercharacter spaces and is equal to 50 baud.

  PARIS happened to have 50 code elements in the word.  It also helped that the organization that did the telegraphic standards was headed at this time in Paris, France.  The ITU was founded on 17 May 1865 when the first International Telegraph Convention was signed in Paris by the 20 founding members, and the International Telegraph Union (ITU) was established.


  50 code elements = 50 baud = 25 dots and intercharacter spaces.



  73

  David J. Ring, Jr., N1EA
  SOWP, VWOA, OOTC, FISTS, CW-Ops, JARL-A1, A1-OP, ex-FOC 1271 ARRL-LM Chat Skype: djringjr MSN: djringjr at msn.com AIM: N1EA icq: 27380609

  Radio-Officers Google Group -- Marine Morse Historic Recordings Page 



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