I use the 6ms setting on my IC-7610 and IC-7300 feeding an ACOM amp and am
able to uphold a
friendly coexistence with my neighbors SA7JMA and SA7BKX 400 and 900 yards
away, respectively.
It may however still not be as narrow as an Elecraft which uses the
theoretically optimal raised cosine
curve shape.
In addition to the keying rise time it is also important to use a PTT lead
time long enough so that the PA T/R
relay is well settled when the carrier appears. Factory default PTT lead
time on many radios (Elecraft particularly,
with 8ms) is too short for non-QSK PA.
Björn SM7IUN
Den lör 6 juni 2020 kl 21:29 skrev <donovanf@starpower.net>:
> 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 menues election
> may be a better choice.
>
> In any case, 6 milliseconds should make you a better citizen than 4 msec.
>
> 73
> Frank
> W3LPL
>
> ------------------------------
> *From: *"Tad Danley" <tdanley@centurylink.net>
> *To: *donovanf@starpower.net
> *Cc: *cq-contest@contesting.com, "cwops" <cwops@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@starpower.net
> To: cq-contest@contesting.com, cwops <cwops@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@gmail.com>
> To: cq-contest@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@cqwpx.com> director@cqwpx.com
>
>
>
>
>
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