[GreenKeys] Computing The Speed Of CW

[Jeffrey D Angus]

hunybuny at eskimo.com wrote:
> Here is a rough example of the speed -vs- the clock times.
> The higher speeds may be off because the way I'm finding
> the clock speed is to key "dits" on my rig's keyer and
> then changing the interrupt speed on the computer until
> they match.
Ok, a few "basics" first.

Dit = 1
Dah =3
Space between a dit and a dah =1
(Might be a bit sketchy here)
Space between letters = 2
Space between words = 4

And if I remember right, the standard "one word" is paris.
So .--. .- .-. .. ...
Should be a total of 48 (including the between word space)

This assumes perfect machine code, not somebody sending
20 WPM characters at 10 WPM spacing.

Using the above numbers, and a square wave to generate the
keying, 10 WPM should be running at a rate of 4 Hz. (This
will give you a dit time of 125 mS and a dah time of 375 mS.)

As to your rig telling you how fast you're sending, that's kind
of like how they calibrate an S-meter. If it reads high, you've
obviously got a hotter receiver ;-)

Being this is the internet, I have to give the following standard
disclaimer, "Your mileage may vary" and rest assured that if I'm
wrong, someone will be more than happy to correct me. ;-)

Jeff-1.0
wa6fwi

-- 
“Egotism is the anesthetic that dulls the pain of stupidity.”
Frank Leahy, Head coach, Notre Dame 1941-1954

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