[CW] [Radio Officers, &c] The PARIS Timing of Morse.

[1oldlens1]

Note that PARIS is for plain English text . Another word CODEX is used for five letter colored groups.  Only a slight difference . I now longer remember where I first saw the use of these words for simulating code speed but it was decades ago.Sent from my Galaxy
-------- Original message --------From: Dave Ellis <n1ea at arrl.net> Date: 3/22/23  6:24 AM  (GMT-08:00) To: radio-officers at googlegroups.com Subject: Re: [CW] [Radio Officers, &c] The PARIS Timing of Morse. David,Thanks for the neat sketch on the PARIS method of measuring CW speed.  Some years ago I published an article which demonstrated how to use PARIS to measure CW speed directly from the paddle just be sending a short burst of dots.  Here’s an extract from it:A New Morse Speed FormulaWe can use the Paris standard to develop a new formula for reading Morse Speed.  Although it’s very simple, I believe this is original to myself, as I’ve never seen it in print anywhere.Assume you send the word PARIS 12 times in one minute at a constant speed.  Then you send 12 x 50 = 600 time elements in one minute.  This equates to 600/60 = ten elements in 1 second.Now 10 elements in one second is the equivalent of 5 dots per second (with their inter-element spaces), or a dot frequency of 5 Hz.  So 12 words per minute, or wpm, equates to a 5 Hz dot frequency, and 2.4 wpm equates to a 1 Hz dot frequency.  You can now see that morse speed in wpm = 2.4 x dot frequency.  This leads to the all-important formula:S = 2.4d, where S = speed in wpm (words per minute) and d = dot frequency in Hz. This is all that is needed to design a CW Speedo; if you can measure dot speed, you can calculate speed in wpm (assuming the rest of the elements are correctly formed).It works best with a paddle, and can work with a bug key (which I never tried), but needs a steady hand to measure using a pump key.The frequencies involved are very low, the range 1 wpm to 50 wpm producing a dot frequency of 0.4 Hz to 21.8 Hz.  Once the frequency is measured, the formula has to be applied.  To overcome this rather clumsy method, I designed a circuit which gave a reading directly in wpm on a moving coil meter calibrated either 0-30 or 0-50 wpm as required.  The paddle key is simply plugged into the circuit.  Details available from me on request.Best regards and 73s,DaveG4AJY.On 22 Mar 2023, at 03:54, David J. J. Ring, Jr. <n1ea at arrl.net> wrote:
  
    
  
  
    
      
        
          
            The PARIS
                  system of #MorseCode
                  timing: https://www.qsl.net/yo3fca/hstc.htm
                #hamr
                #hamradio
                #cw
          
        
        
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      73
      DR
      
    
  

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