[CQ-Contest] WPX CW Signal Quality Concerns

[Björn Ekelund]

You are perfectly right, Pete, Insufficient PTT lead time
only causes a click at the start of transmission (unless it is QSK).
Most modern PA issues a warning when this happens.

With the exception of the K3, all modern radios can be adjusted to avoid
this.

The issue with the K3 is that increasing the PTT lead time (CONFIG:TX DLY)
more than a little beyond the 8ms factory default starts to distort the
keying.
A surprisingly large, and still unaddressed, design flaw in a radio that is
"best" in so many regards.

The only solution I know to this is to use an external keyer and let it
be responsible for the PTT lead time.

Björn SM7IUN

Den sön 7 juni 2020 kl 02:31 skrev N4ZR <n4zr at comcast.net>:

> Pardon a dumb question, but isn't the TXDelay normally from TR relay
> actuation to first RF? I know that's the case with my K3.  In that case,
> unless you're running QSK, I don't see how that would cause clicks
> throughout the transmission, just at the beginning of the first character.
>
> 73, Pete N4ZR
> Check out the Reverse Beacon Network
> at <http://reversebeacon.net>, now
> spotting RTTY activity worldwide.
> For spots, please use your favorite
> "retail" DX cluster.
>
> On 6/6/2020 3:29 PM, donovanf at starpower.net wrote:
> > Hi Tad,
> >
> >
> > I don't know the specific answer to your question, it depends on the
> > details of the IC-7610 design.
> >
> >
> > The October 2018 QST product review discusses the IC-7610 4 msec
> > keying rise time and the possibility that the 6 msec menue s election
> > may be a better choice.
> >
> >
> > In any case, 6 milliseconds should make you a better citizen than 4 msec.
> >
> >
> > 73
> > Frank
> > W3LPL
> >
> >
> >
> > ----- Original Message -----
> >
> > From: "Tad Danley" <tdanley at centurylink.net>
> > To: donovanf at starpower.net
> > Cc: cq-contest at contesting.com, "cwops" <cwops at groups.io>
> > Sent: Saturday, June 6, 2020 7:08:31 PM
> > Subject: Re: [CQ-Contest] WPX CW Signal Quality Concerns
> >
> > Frank, my IC-7610 has 6 and 8 millisecond options as well. Is there any
> disadvantage to using 8 ms?
> >
> > Best regards,
> >
> > Tad Danley
> > K3TD
> >
> > ----- Original Message -----
> > From: donovanf at starpower.net
> > To: cq-contest at contesting.com, cwops <cwops at groups.io>
> > Sent: Sat, 06 Jun 2020 14:37:56 -0400 (EDT)
> > Subject: Re: [CQ-Contest] WPX CW Signal Quality Concerns
> >
> > That's an excellent step forward Bud. There's no excuse for intentional
> > key clicks but that's exactly the place where the Japanese manufacturers
> > have intentionally put us in 2020.
> >
> >
> > The current generation of Japanese transceivers are making key click
> > problems much worse than before. Our only hope is that contest
> > sponsors improve their rules and enforce them against contesters
> > taking advantage of the fast CW rise time menu options in their radios.
> >
> >
> > Manufacturers are completely irresponsible with their 4 millisecond
> > default CW rise times and egregiously irresponsible with menus
> > options that allow users to select 1 and 2 millisecond rise times.
> >
> >
> >
> >
> > Kenwood and Yaesu provide completely unacceptable 1 and 2
> > millisecond rise time menu options and Icom is almost as bad with
> > their 2 millisecond menu option.
> >
> >
> > Why are ARRL and the U.S. distributors not communicating with our
> > Japanese equipment manufacturers about the problems they're causing
> > and enabling?
> >
> >
> >
> > 73
> > Frank
> > W3LPL
> >
> > ----- Original Message -----
> >
> > From: "cqwpx director" <cqwpx.director at gmail.com>
> > To: cq-contest at contesting.com
> > Sent: Saturday, June 6, 2020 4:58:15 PM
> > Subject: [CQ-Contest] WPX CW Signal Quality Concerns
> >
> > I have received two (2) actionable complaints of signal quality issues
> > during WPX CW, which are both under review.
> >
> >
> >
> > We will investigate additional signal quality concerns. Please provide
> the
> > call to be reviewed, along with the date, time and band of the observed
> > signal quality issue.
> >
> >
> >
> > 73,
> >
> >
> >
> > Bud Trench, AA3B
> >
> > Director, CQ WPX Contest
> >
> > web: <https://cqwpx.com> https://cqwpx.com
> >
> > email: <mailto:director at cqwpx.com> director at cqwpx.com
> >
> >
> >
> >
> >
> > _______________________________________________
> > CQ-Contest mailing list
> > CQ-Contest at contesting.com
> > http://lists.contesting.com/mailman/listinfo/cq-contest
> >
> >
> >
> > _______________________________________________
> > CQ-Contest mailing list
> > CQ-Contest at contesting.com
> > http://lists.contesting.com/mailman/listinfo/cq-contest
> >
> >
> > _______________________________________________
> > CQ-Contest mailing list
> > CQ-Contest at contesting.com
> > http://lists.contesting.com/mailman/listinfo/cq-contest
> _______________________________________________
> CQ-Contest mailing list
> CQ-Contest at contesting.com
> http://lists.contesting.com/mailman/listinfo/cq-contest
>