[Lowfer] CW Spacings

Clint Turner turner at ussc.com
Sat Mar 24 11:51:00 EST 2007


The rule-of-thumb that I used is based on 10 baud being 12 wpm

That is, at 12 wpm, a dit it 0.1 seconds and a dah is 0.3 seconds.

Interelement spacing (the timing between individual dits and dahs in a 
letter) is one dit period, while the spacing between letters is one dah 
space.

This agrees fairly closely with the "PARIS" method - that is, at a given 
machine-generated speed, how many times the word PARIS can be sent.

Clint
KA7OEI/CT


Stan wrote:

> Hello The Net:
>
> As compared to the length of time for a Morse code dot:
>
> Any idea on what the dot length, of a dash is ?      3-4 time ?
>
> ditto for the inter dot/dash spacing ?     1-2 dots lengths ?
>
> ditto for the character spacing between letter/numbers ?     1 dash 
> length
>
> ditto for spacing between words ?     3 dash lengths ?
>
>
> I am modeling a CW ID message in QRSS (120 sec dots) to determine how 
> I can comply with  the requirement of 10 minute CW IDing.
> Maybe a STA for part 97  ham band operation is needed.
>
> Stan, W1LE   Cape Cod   FN41sr



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