[Elecraft] CW rise time setting

[David Gilbert]

You don't need to generate clicks to have a crisp CW tone.  Elecraft uses a
pretty much optimally shaped waveform (some version of a cosine function)
and if I remember correctly the rise time is only about 2.5 msec, although
I could be wrong about that last part.  And while you may be careful not to
use short rise/fall times when the band is active, in the past there have
been folks on the contesting reflector who openly admitted they purposely
generate clicks by shortening the rise/fall times to give themselves elbow
room.  I will always appreciate that Elecraft doesn't give those miscreants
the means to pollute the band.

73,
Dave   AB7E

On Mon, Jun 8, 2020 at 9:23 AM Richard Stutsman <rastuts at gmail.com> wrote:

> I for one would like to have some control over the rise/fall times.
>
> You want the cleanest (narrowest) of CW signals when operating on a crowded
> band or in a contest - unless you're a rare DX station. Most of my
> operations are 22wpm rag chews on very uncrowded bands. We're often the
> only discernible signals on an entire CW band. And conditions are often
> noisy with deep QSB. Why not allow those of us operating in those
> circumstances to shorten the rise times a bit, which makes it easier to
> copy in noisy conditions, when any close-in clicks or thumps aren't going
> to bother anybody? Copying a 'soft' weak CW signal is like trying to read a
> 'crisp' signal that's an entire S-unit weaker, IMO.
>
> My TS-590sg let's me do that, and I love it!
>
> Will the K4 sound as good as a Drake T4C? (Just askin'.)
>
> Rick N6IET
>
> > N4ZR wrote:
> > >
> > > Will the K4 have options for setting CW rise and fall times...?
> > Hi Pete,
> > Probably not. We've always been very careful to ensure our rigs have an
> > exceptional clean, click-free CW signal. (Third-party testing bears this
> > out.) Minimizing the bandwidth requires a very specific rise/fall time
> and
> > a hand-crafted sigmoidal shaping function in DSP.
> > Colonel Sanders closely guards his fried chick recipe, Mrs. Fields won't
> > reveal what's in her chocolate-chip cookies, and only selected firmware
> > monks--sworn to secrecy--are privy to Elecraft's keying envelope
> > coefficients :)
> > 73,
> > Wayne
> > N6KR
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