[Elecraft] SWR on 40 meters

Wed Jan 4 18:40:00 EST 2017

Mike and Jim

I am having the same problem on 40 M only with one of two K3s. Both have 
new synth boards and antenna tuners bypassed.

Jim W0UO

On 1/4/2017 4:21 PM, elecraft-request at mailman.qth.net wrote:
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> Today's Topics:
>
>     1. Re: Audio artifacts in DATA A mode with KX3 (Wayne Burdick)
>     2. Re: Audio artifacts in DATA A mode with KX3 (Nicklas Johnson)
>     3. Re: Elecraft Website Hacked? (Richard Fjeld)
>     4. Re: Elecraft Website Hacked? (Matt Murphy)
>     5. Re: Kenwood MC-50 Mic and K2 (ken mcmahon)
>     6. Re: Kenwood MC-50 Mic and K2 (Don Wilhelm)
>     7. Macro for text decode (Mike Weir)
>     8. Re: Macro for text decode (tomb18)
>     9. Re: Macro for text decode (Don Wilhelm)
>    10. Re: Macro for text decode (Ron D'Eau Claire)
>    11. Re: Macro for text decode (Harry Yingst)
>    12. Re: Macro for text decode (Don Wilhelm)
>    13. Re: Macro for text decode (Tom)
>    14. SWR on 40 meters (Mike Wetzel)
>    15. Re: SWR on 40 meters (K9MA)
>    16. Re: Audio artifacts in DATA A mode with KX3 (David Anderson)
>    17. Re: Macro for text decode (Harry Yingst)
>    18. Re: Macro for text decode (Cady, Fred)
>    19. K3 Monitor function (Edward Seeliger)
>    20. Re: K3 Monitor function (Tony G6GLP)
>    21. Re: Audio artifacts in DATA A mode with KX3 (Carl J?n Denbow)
>    22. K3 Monitor function (Edward Seeliger)
>    23. Re: SWR on 40 meters (Jim Brown)
>    24. For Sale: KX-2 s/n 8xx (Jack Colson)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 3 Jan 2017 13:45:10 -0800
> From: Wayne Burdick <n6kr at elecraft.com>
> To: David Anderson <gm4jjj at yahoo.co.uk>
> Cc: Nicklas Johnson <nick at n6ol.us>, elecraft
> 	<elecraft at mailman.qth.net>
> Subject: Re: [Elecraft] Audio artifacts in DATA A mode with KX3
> Message-ID: <A1102AAE-EDDD-4C2E-8B38-6FD10725A8CE at elecraft.com>
> Content-Type: text/plain; charset=utf-8
>
> This is on the KX3 firmware list. I'll move it up a notch.
>
> Wayne
> N6KR
>
>
> On Jan 3, 2017, at 12:16 AM, David Anderson via Elecraft <elecraft at mailman.qth.net> wrote:
>
>> Nick,
>>
>> Thank you for bringing this up.
>>
>> I never did get a satisfactory explanation, I contacted support too but that didn't get me anywhere either, I don't think they understood my question, which is quite simple really, why can't we get the same bandwidth in Data mode as in SSB mode? I think it's a simple oversight, but nobody seemed interested in acknowledging it or fixing it.
>>
>>
>> 73 from David GM4JJJ
>>
>>> On 2 Jan 2017, at 23:54, Nicklas Johnson <nick at n6ol.us> wrote:
>>>
>>> J?rg in the Elecraft KX3 group on Facebook had an interesting observation:
>>> with WJST's waterfall, if the "flatten" mode is on, it produces some
>>> unusual artifacts in the presence of sharp spectrum drop-offs, and indeed
>>> if I turn off the "flatten" feature and manually set the zero point for the
>>> waterfall, the artifacts go away.
>>>
>>> It's still an open question as to why the data-a mode has a steep drop-off
>>> at 400Hz when the PBT settings on the rig would seem to indicate otherwise,
>>> and the same drop-off isn't there in USB mode.
>>>
>>> I see searching on "400 Hz" that GM4JJJ had the same question here on the
>>> last back in July 2015, but never really got an answer.  I basically have
>>> the same question as this one:
>>> https://www.mail-archive.com/[email protected]/msg183837.html
>>>
>>>   Nick
>>>
>>>
>>>> On 2 January 2017 at 12:06, Nicklas Johnson <nick at n6ol.us> wrote:
>>>>
>>>> I'm seeing some unexpected audio artifacts when using DATA A mode with the
>>>> latest production firmware on my KX3, on all bands.  This is something I
>>>> observe when the PBT BW is set all the way wide (4KHz) and FC is centered.
>>>>
>>>> In DATA mode, there's an audio drop-off between 200 and 325 Hz, with an
>>>> almost completely dead audio "hole" between 250 and 300 Hz.  Then there's
>>>> some additional noise between 350 and 500 Hz.
>>>>
>>>> If I switch to USB mode (with no EQ or audio effects applied, naturally),
>>>> all of these artifacts go away, and it's perfectly smooth across the
>>>> spectrum.  No drop-off, no noise.
>>>>
>>>> Pictures of the waterfalls for comparison here: http://imgur.com/a/AjHu4
>>>>
>>>> Am I doing something wrong, or is there something I should check?  I've
>>>> taken the usual steps, but it's plausible I've missed something.
>>>>
>>>> ?   Nick?
>>>>
>>>> --
>>>> *N6OL*
>>>> Saying something doesn't make it true.  Belief in something doesn't make
>>>> it real. And if you have to lie to support a position, that position is not
>>>> worth supporting.
>>>>
>>>
>>>
>>> -- 
>>> *N6OL*
>>> Saying something doesn't make it true.  Belief in something doesn't make it
>>> real. And if you have to lie to support a position, that position is not
>>> worth supporting.
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
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>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to gm4jjj at yahoo.co.uk
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
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>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to n6kr at elecraft.com
>
>
> ------------------------------
>
> Message: 2
> Date: Tue, 3 Jan 2017 13:46:12 -0800
> From: Nicklas Johnson <nick at n6ol.us>
> To: Wayne Burdick <n6kr at elecraft.com>
> Cc: David Anderson <gm4jjj at yahoo.co.uk>, elecraft
> 	<elecraft at mailman.qth.net>
> Subject: Re: [Elecraft] Audio artifacts in DATA A mode with KX3
> Message-ID:
> 	<CA+ZptLnT3oQHLG=dABW3Pp34odN5mWARGgS+9ZtNBzXSnoPFxg at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
> Thank you, Wayne!  At least we know we're not crazy :-)
>
>     Nick / N6OL
>
> On 3 January 2017 at 13:45, Wayne Burdick <n6kr at elecraft.com> wrote:
>
>> This is on the KX3 firmware list. I'll move it up a notch.
>>
>> Wayne
>> N6KR
>>
>>
>> On Jan 3, 2017, at 12:16 AM, David Anderson via Elecraft <
>> elecraft at mailman.qth.net> wrote:
>>
>>> Nick,
>>>
>>> Thank you for bringing this up.
>>>
>>> I never did get a satisfactory explanation, I contacted support too but
>> that didn't get me anywhere either, I don't think they understood my
>> question, which is quite simple really, why can't we get the same bandwidth
>> in Data mode as in SSB mode? I think it's a simple oversight, but nobody
>> seemed interested in acknowledging it or fixing it.
>>>
>>> 73 from David GM4JJJ
>>>
>>>> On 2 Jan 2017, at 23:54, Nicklas Johnson <nick at n6ol.us> wrote:
>>>>
>>>> J?rg in the Elecraft KX3 group on Facebook had an interesting
>> observation:
>>>> with WJST's waterfall, if the "flatten" mode is on, it produces some
>>>> unusual artifacts in the presence of sharp spectrum drop-offs, and
>> indeed
>>>> if I turn off the "flatten" feature and manually set the zero point for
>> the
>>>> waterfall, the artifacts go away.
>>>>
>>>> It's still an open question as to why the data-a mode has a steep
>> drop-off
>>>> at 400Hz when the PBT settings on the rig would seem to indicate
>> otherwise,
>>>> and the same drop-off isn't there in USB mode.
>>>>
>>>> I see searching on "400 Hz" that GM4JJJ had the same question here on
>> the
>>>> last back in July 2015, but never really got an answer.  I basically
>> have
>>>> the same question as this one:
>>>> https://www.mail-archive.com/[email protected]/msg183837.html
>>>>
>>>>   Nick
>>>>
>>>>
>>>>> On 2 January 2017 at 12:06, Nicklas Johnson <nick at n6ol.us> wrote:
>>>>>
>>>>> I'm seeing some unexpected audio artifacts when using DATA A mode with
>> the
>>>>> latest production firmware on my KX3, on all bands.  This is something
>> I
>>>>> observe when the PBT BW is set all the way wide (4KHz) and FC is
>> centered.
>>>>> In DATA mode, there's an audio drop-off between 200 and 325 Hz, with an
>>>>> almost completely dead audio "hole" between 250 and 300 Hz.  Then
>> there's
>>>>> some additional noise between 350 and 500 Hz.
>>>>>
>>>>> If I switch to USB mode (with no EQ or audio effects applied,
>> naturally),
>>>>> all of these artifacts go away, and it's perfectly smooth across the
>>>>> spectrum.  No drop-off, no noise.
>>>>>
>>>>> Pictures of the waterfalls for comparison here:
>> http://imgur.com/a/AjHu4
>>>>> Am I doing something wrong, or is there something I should check?  I've
>>>>> taken the usual steps, but it's plausible I've missed something.
>>>>>
>>>>> ?   Nick?
>>>>>
>>>>> --
>>>>> *N6OL*
>>>>> Saying something doesn't make it true.  Belief in something doesn't
>> make
>>>>> it real. And if you have to lie to support a position, that position
>> is not
>>>>> worth supporting.
>>>>>
>>>>
>>>>
>>>> --
>>>> *N6OL*
>>>> Saying something doesn't make it true.  Belief in something doesn't
>> make it
>>>> real. And if you have to lie to support a position, that position is not
>>>> worth supporting.
>>>> ______________________________________________________________
>>>> Elecraft mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:Elecraft at mailman.qth.net
>>>>
>>>> This list hosted by: http://www.qsl.net
>>>> Please help support this email list: http://www.qsl.net/donate.html
>>>> Message delivered to gm4jjj at yahoo.co.uk
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Elecraft at mailman.qth.net
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to n6kr at elecraft.com
>>
>