John, Thanks for the comments below. I actually thought of putting this on my oscilloscope to measure the actual timing but I was just too lazy. Another idea I had which I may still do is to record a string of dots from the KX2 and the K3 and then use signal processing to measure the timing between dots. I figure I can use Mathematica (Wolfram) for this. This is what I might do when I get an afternoon free to do it — maybe in the dead of winter.
73, phil > On Aug 11, 2017, at 11:22 AM, John Oppenheimer <[email protected]> wrote: > > Hi Phil, > > Yes there is a little difference. > > One standard for WPM can be found in: > https://en.wikipedia.org/wiki/Morse_code > as T = 1200 / W or WPM = 1200 / T > Where T is dot duration in mS. > > To remove weighting, using an oscilloscope to measure Dot and Space > time. The keyer is using the micro-controller, which is doing other > things, therefore there is a little jitter. To filter jitter out, > oscilloscope averaging is enabled. > > K3 116.0 mS (Dot+Space) = 20.7 WPM > KX2 114.8 mS (Dot+Space) = 20.9 WPM > > John KN5L > > > On 08/11/2017 09:54 AM, Phil Hystad wrote: >> I think I have detected a subtle difference between the keyer speed of my >> KX2 and my K3. Is this possible? How far off? About one word per minute I >> think. The KX2 being faster that is. Thus, I run my K3 at 20 wpm as my >> normal speed and my KX2 at 19 wpm to obtain the same feel. Defininately not >> large enough to be a bother, I am mostly just curious as to whether this is >> true. > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
