[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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