## Re: [cw_bugs] Dit speed to WPM?

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• Further to my last message - I ve been looking for the little box graph showing the baud of morse code, but I found this at Kent Engineers - the makers of Kent
Message 1 of 11 , Dec 6, 2006
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Further to my last message - I've been looking for the little box graph showing the baud of morse code, but I found this at Kent Engineers - the makers of Kent keys.

Unfortunately - a picture is worth "how many are there?" words pasted herein.

73

David Ring, N1EA
Calculating Morse Code Speed

The word PARIS is the standard for determing CW code speed. Each dit is one element, each dah is three elements, intra-character spacing is one element, inter-character spacing is three elements and inter-word spacing is seven elements. The word PARIS is exactly 50 elements.
Note that after each dit/dah of the letter P -- one element spacing is used except the last one. (Intra-Character).
After the last dit of P is sent, 3 elements are added (Inter-Character). After the word PARIS - 7 elements are used.
Thus:
P = di da da di = 1 1 3 1 3 1 1 (3) = 14 elements
A = di da = 1 1 3 (3) = 8 elements
R = di da di = 1 1 3 1 1 (3) = 10 elements
I = di di = 1 1 1 (3) = 6 elements
S = di di di = 1 1 1 1 1 [7] = 12 elements
Total = 50 elements
() = intercharacter
[] = interword
If you send PARIS 5 times in a minute (5WPM) you have sent 250 elements (using correct spacing). 250 elements into 60 seconds per minute = 240 milliseconds per element.

13 words-per-minute is one element every 92.31 milliseconds.

The Farnsworth method sends the dits and dahs and intra-character spacing at a higher speed, then increasing the inter-character and inter-word spacing to slow the sending speed down to the overall speed. For example, to send at 5 wpm with 13 wpm characters in Farnsworth method, the dits and intra-character spacing would be 92.3 milliseconds, the dah would be 276.9 milliseconds, the inter-character spacing would be 1.443 seconds and inter-word spacing would be 3.367 seconds.

----- Original Message -----
From: David J. Ring, Jr.
To: cw_bugs@yahoogroups.com
Sent: Thursday, December 07, 2006 1:02 AM
Subject: Re: [cw_bugs] Dit speed to WPM?

By defination a "word" in Morse Code is the 50 baud PARIS. PARIS consists of 50 basic units of time (dots) so it is 50 baud.

60 wpm would be PARIS sent 60 times in one minute.

Thus one PARIS (50 baud) in one second would be sent.

Each dot is 1/50 of a second since 50 baud is sent in one second, then the basic element of the baud is the dot, and it takes 1/50th of a second at 60 wpm.

Thus at 30 wpm the dot takes 2/50th of a second of 1/25 of a second.

10 wpm would be 3/25 of a second dots.

The reason that American Morse is faster than International Morse is because of the "dotty" letters allow it to have more and fast characters than International Morse.

E
I
S
H
T
M = all remain the same - fast letters.
O is faster ee
C is faster ee e
R is faster e ee
Y is faster ee ee
L is faster daaaah

You could calculate this by taking the "most common letters in newsprint (messages)" and compare the baud count in both American Morse and International Morse.

I believe according to my memory when I did this it figured out to about 25% faster for American.

But American Morse would also be faster than International for CODE GROUPS because of the introduction of "dotty" characters.

In International Morse, code groups sent at 20 gpm (groups per minute) equal the "transmission speed" of English sent at 25 wpm (words per minute) - words and groups both being counted as "5" characters.

Also in the old estimation of code speed by American Morse operators, the speed is calculated as "expanded words" from Phillips Code at the ear, to English at the typewriter.

In any event, the limiting factor is the typewriter!

73

DR
----- Original Message -----
From: Donald Kemp
To: cw_bugs@yahoogroups.com
Sent: Friday, December 01, 2006 6:31 PM
Subject: Re: [cw_bugs] Dit speed to WPM?

Earl,

Let me try to figure this out.
If I send PARIS in one minute that's 1 WPM.
P = 2 dits and 2 dahs. 1 dah = 3 dits x 2 = 6 + 2 = 8 + 3 spaces between
elements & + 1 space between character = 12 dits
A = 1 dit and 1 dah. Thats 1 + 3 + 1 element space + 1 character space = 6
dits
R = 2 dits and 1 dah. 5 = 2 element spaces + 1 character space = 8 dits
I = 2 dits + 1 element space + 1 character space = 4 dits
S = 3 dits + 2 element spaces = 5 dits.

Total dits = 12 + 6 + 8 + 4 + 5 = 35 dits in one minute or 60/35 =
1.7142857seconds/dit
Space between words = 1 dah = 3 dits.
20 WPM would be 60/(20 x 35) + (19 x 3) = 757. 60/757 = .07926 seconds/dit.
1/.07926 = 12.617 dits/second = 20 WPM.

Maybe.

I may be missing something in the spaces between words. Do I actually count
them for the dit count?
If not it would be:
20 WPM = 60/(20 x 35) = .0857 sec/dit.
1/.0857 = 11.668 dits/sec = 20 WPM

Not too much difference.

So for any other WPM calculation (using the second formula) it would be:
X WPM = 60/(X x 35) = Y sec/dit
1/Y = Z dits/sec.

IE for 15 WPM.

15 WPM = 60/(15 x 35) = .1142857 sec/dit
1/.1142857 = 8.75 dits/sec.

Hopefully there's already a table somewhere that will let me know if I'm all
wet.

It was fun anyway Earl.

73,

Don, NN8B
SKCC 36

On 12/1/06, Earl Needham <needhame1@...> wrote:
>
>
> Is there a general rule of thumb, that so many dits per
> second equals so many WPM? It would make it a lot easier to figure
> how fast somebody was sending, how fast a bug is, etc. -- a LOT
> easier than sending PARIS repeatedly! :-)
>
> Thanks,
> Earl
>
> KD5XB
> Clovis, New Mexico DM84jk
> http://groups.yahoo.com/group/cw_bugs
>
>
>

[Non-text portions of this message have been removed]

----------------------------------------------------------------------------

No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.430 / Virus Database: 268.15.3/562 - Release Date: 12/1/2006 1:12 PM

[Non-text portions of this message have been removed]
• While we re on captivating subjects, does anyone know how many pieces of lint makes a bellbutton full? 73, Milt k4oso ... consists of 50 basic units of time
Message 2 of 11 , Dec 7, 2006
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While we're on captivating subjects, does anyone know how many pieces
of lint makes a bellbutton full?
73, Milt k4oso

--- In cw_bugs@yahoogroups.com, "David J. Ring, Jr." <n1ea@...> wrote:
>
> By defination a "word" in Morse Code is the 50 baud PARIS. PARIS
consists of 50 basic units of time (dots) so it is 50 baud.
>
> 60 wpm would be PARIS sent 60 times in one minute.
>
> Thus one PARIS (50 baud) in one second would be sent.
>
> Each dot is 1/50 of a second since 50 baud is sent in one second,
then the basic element of the baud is the dot, and it takes 1/50th of
a second at 60 wpm.
>
> Thus at 30 wpm the dot takes 2/50th of a second of 1/25 of a second.
>
> 10 wpm would be 3/25 of a second dots.
>
> The reason that American Morse is faster than International Morse
is because of the "dotty" letters allow it to have more and fast
characters than International Morse.
>
> E
> I
> S
> H
> T
> M = all remain the same - fast letters.
> O is faster ee
> C is faster ee e
> R is faster e ee
> Y is faster ee ee
> L is faster daaaah
>
> You could calculate this by taking the "most common letters in
newsprint (messages)" and compare the baud count in both American
Morse and International Morse.
>
> I believe according to my memory when I did this it figured out to
>
> But American Morse would also be faster than International for CODE
GROUPS because of the introduction of "dotty" characters.
>
> In International Morse, code groups sent at 20 gpm (groups per
minute) equal the "transmission speed" of English sent at 25 wpm
(words per minute) - words and groups both being counted as "5"
characters.
>
> Also in the old estimation of code speed by American Morse
operators, the speed is calculated as "expanded words" from Phillips
Code at the ear, to English at the typewriter.
>
> In any event, the limiting factor is the typewriter!
>
> 73
>
> DR
> ----- Original Message -----
> From: Donald Kemp
> To: cw_bugs@yahoogroups.com
> Sent: Friday, December 01, 2006 6:31 PM
> Subject: Re: [cw_bugs] Dit speed to WPM?
>
>
> Earl,
>
> Let me try to figure this out.
> If I send PARIS in one minute that's 1 WPM.
> P = 2 dits and 2 dahs. 1 dah = 3 dits x 2 = 6 + 2 = 8 + 3 spaces
between
> elements & + 1 space between character = 12 dits
> A = 1 dit and 1 dah. Thats 1 + 3 + 1 element space + 1 character
space = 6
> dits
> R = 2 dits and 1 dah. 5 = 2 element spaces + 1 character space =
8 dits
> I = 2 dits + 1 element space + 1 character space = 4 dits
> S = 3 dits + 2 element spaces = 5 dits.
>
> Total dits = 12 + 6 + 8 + 4 + 5 = 35 dits in one minute or 60/35 =
> 1.7142857seconds/dit
> Space between words = 1 dah = 3 dits.
> 20 WPM would be 60/(20 x 35) + (19 x 3) = 757. 60/757 = .07926
seconds/dit.
> 1/.07926 = 12.617 dits/second = 20 WPM.
>
> Maybe.
>
> I may be missing something in the spaces between words. Do I
actually count
> them for the dit count?
> If not it would be:
> 20 WPM = 60/(20 x 35) = .0857 sec/dit.
> 1/.0857 = 11.668 dits/sec = 20 WPM
>
> Not too much difference.
>
> So for any other WPM calculation (using the second formula) it
would be:
> X WPM = 60/(X x 35) = Y sec/dit
> 1/Y = Z dits/sec.
>
> IE for 15 WPM.
>
> 15 WPM = 60/(15 x 35) = .1142857 sec/dit
> 1/.1142857 = 8.75 dits/sec.
>
> Hopefully there's already a table somewhere that will let me know
if I'm all
> wet.
>
> It was fun anyway Earl.
>
> 73,
>
> Don, NN8B
> SKCC 36
>
> On 12/1/06, Earl Needham <needhame1@...> wrote:
> >
> >
> > Is there a general rule of thumb, that so many dits per
> > second equals so many WPM? It would make it a lot easier to
figure
> > how fast somebody was sending, how fast a bug is, etc. -- a LOT
> > easier than sending PARIS repeatedly! :-)
> >
> > Thanks,
> > Earl
> >
> > KD5XB
> > Clovis, New Mexico DM84jk
> > http://groups.yahoo.com/group/cw_bugs
> >
> >
> >
>
> [Non-text portions of this message have been removed]
>
>
>
>
>
>
> --------------------------------------------------------------------
----------
>
>
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.5.430 / Virus Database: 268.15.3/562 - Release Date:
12/1/2006 1:12 PM
>
>
> [Non-text portions of this message have been removed]
>
• By the way, a bellbutton is the same as a bellybutton :-) Milt k4oso
Message 3 of 11 , Dec 7, 2006
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By the way, a "bellbutton" is the same as a "bellybutton":-)
Milt k4oso
• ... Gee, now you got me wondering if this same comparison translates over to bell bottoms... Earl KD5XB Clovis, New Mexico DM84jk
Message 4 of 11 , Dec 7, 2006
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At 11:53 AM 12/7/2006, k4oso wrote:
>By the way, a "bellbutton" is the same as a "bellybutton":-)
>Milt k4oso

Gee, now you got me wondering if this same comparison
translates over to bell bottoms...

Earl

KD5XB
Clovis, New Mexico DM84jk
http://groups.yahoo.com/group/cw_bugs
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