[Elecraft] K3 CW speed request

[Andrew Faber]

Those dashes sound a little long.  The formula normally used to calculate 
lengths of  elements is
dot length (msec) equals 1200 divided by wpm.
  Thus, at 22 wpm, the dot length should be 54.5 msec.  Dashes are normally 
three times as long, i.e., 163.5 msec.
  73, andy, ae6y
----- Original Message ----- 
From: <drewko1 at verizon.net>
To: <Elecraft at mailman.qth.net>
Sent: Thursday, July 03, 2008 6:58 AM
Subject: Re: [Elecraft] K3 CW speed request


> On Thu, 03 Jul 2008 13:53:14 +0100, David G4DMP/G3KEP wrote:
>
>>In a recent message, charles <m0bin at m0bin.demon.co.uk> wrote ...
>>>Is it possible to have a speed step of .5 in between the present CW speed
>>>settings of whole numbers?
>>>
>>>I am particularly looking for a CW speed of 21.5 wpm just now.
>>
>>Charles, I doubt that the tolerance of the K3 displayed speed is better
>>than +/- 0.5wpm, so you may find that 21 or 22wpm could be just the
>>speed you are looking for.  Have you measured it accurately?  Your
>>findings would be of interest here.
>>
>>73
>
>
> I measured the sidetone dah lengths at the speaker:
>
> A 22wpm dah is 0.207 sec; a 21wpm dah is 0.219 sec. Not sure about the
> conversion to wpm but I think this comes out to 24 wpm and 22.8 wpm
> respectively; could be wrong.
>
> 73,
> Drew
> AF2Z
>
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