[Elecraft] K3 CW speed request

Andrew Faber andrew.faber at gte.net
Thu Jul 3 11:59:33 EDT 2008


Drew,
  OK, now I understand: your times are for a dash plus one space.  So, in 
effect a dot would be one quarter of that length at normal weighting. 
Sounds like the calibration may be within the error of measurement.
  73, andy, ae6y
----- Original Message ----- 
From: <drewko1 at verizon.net>
To: <Elecraft at mailman.qth.net>
Sent: Thursday, July 03, 2008 8:18 AM
Subject: Re: [Elecraft] K3 CW speed request


> Ok, using your formula, and allowing for my measurement of dah periods
> (not just dah sound portion of cycle), substituting equivalent dit
> sound time (at assumed 3:1 ratio), I get the following conversions:
>
> 22 wpm K3 readout
> measured 0.207 dah period
> 51.8 msec dit sound equivalent at 3:1 ratio
> 23.2 wpm calculated by the "1200" formula
>
> 21 wpm K3 readout
> measured 0.219 dah period
> 54.8 msec dit sound equivalent at 3:1 ratio
> 21.9 wpm calculated by the "1200" formula
>
> 73,
> Drew
> AF2Z
>
>
> On Thu, 03 Jul 2008 07:39:55 -0700, andy, ae6y wrote:
>
>>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
>
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