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[KX3] Oppopsite Sideband Null question - Redux

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Grant Youngman-2

[KX3] Oppopsite Sideband Null question - Redux

Elecraft Tech Support seems (understandably) a bit slow to respond at this point. This is a repeat of a question I asked a few days ago. Maybe someone else will see it and have some insight (?).

I have redone the opposite sideband null procedure in my KX3 (#8342) with KXFL3 filter board, using both the 2013 per-band null procedure, and the 2015 KXFL3 installation/calibration instructions. The procedures are essentially the same, with a minor difference in RIT setting, and the fact that the KXFL3 installation manual calls this out only on 20M rather than on each band individually.

With my XG3 as a signal source, I get an excellent opposite sideband null using either FL1 or FL2 bandwidth settings on all bands. With narrow bandwidth and FL3 switched in, the null is very broad and shallow, and the opposite sideband is reduced only on the order of 10dB (+/-) rather than the very deep nulls (60+ dB) obtainable with FL1/FL2. As a result, the opposite sideband remains clearly audible when tuning across a signal — say CW at 500 Hz bandwidth, etc.

If anyone else out there has done either of these procedures, did you get as deep a null with FL3 as with FL1/FL2? I’m trying to determine if this is normal, or if there's an issue in the radio, possibly with my KXFL3 board.

Thanks … Grant NQ5T
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Mark Forsyth-2

Re: [KX3] Oppopsite Sideband Null question - Redux

Hi,
Elecraft have a handy little utility called RxSbNull.exe which does the whole process. All you need is an up to date KX3, an up to date XG3, a Windows computer and the utility. It works like a charm. Turn the radio volume down before you start it though otherwise it’ll annoy the hell out of you.

Cheers
Mark Forsyth
http://jandmf.com
VK3KW

> On 12 Jun 2020, at 11:36 pm, Grant Youngman <[hidden email]> wrote:
>
> Elecraft Tech Support seems (understandably) a bit slow to respond at this point. This is a repeat of a question I asked a few days ago. Maybe someone else will see it and have some insight (?).
>
> I have redone the opposite sideband null procedure in my KX3 (#8342) with KXFL3 filter board, using both the 2013 per-band null procedure, and the 2015 KXFL3 installation/calibration instructions. The procedures are essentially the same, with a minor difference in RIT setting, and the fact that the KXFL3 installation manual calls this out only on 20M rather than on each band individually.
>
> With my XG3 as a signal source, I get an excellent opposite sideband null using either FL1 or FL2 bandwidth settings on all bands. With narrow bandwidth and FL3 switched in, the null is very broad and shallow, and the opposite sideband is reduced only on the order of 10dB (+/-) rather than the very deep nulls (60+ dB) obtainable with FL1/FL2. As a result, the opposite sideband remains clearly audible when tuning across a signal — say CW at 500 Hz bandwidth, etc.
>
> If anyone else out there has done either of these procedures, did you get as deep a null with FL3 as with FL1/FL2? I’m trying to determine if this is normal, or if there's an issue in the radio, possibly with my KXFL3 board.
>
> Thanks … Grant NQ5T
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
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Barry LaZar

Re: [KX3] Oppopsite Sideband Null question - Redux

Mark,
Where did you find the utility? I just search the web and the
Elecraft site for the utility, but it never showed up.

73,
Barry
K3NDM

------ Original Message ------
From: "Mark Forsyth" <[hidden email]>
To: "Grant Youngman" <[hidden email]>
Cc: "Elecraft Refl" <[hidden email]>
Sent: 6/13/2020 12:17:44 AM
Subject: Re: [Elecraft] [KX3] Oppopsite Sideband Null question - Redux

>Hi,
>Elecraft have a handy little utility called RxSbNull.exe which does the whole process. All you need is an up to date KX3, an up to date XG3, a Windows computer and the utility. It works like a charm. Turn the radio volume down before you start it though otherwise it’ll annoy the hell out of you.
>
>Cheers
>Mark Forsyth
>http://jandmf.com
>VK3KW
>
>> On 12 Jun 2020, at 11:36 pm, Grant Youngman <[hidden email]> wrote:
>>
>> Elecraft Tech Support seems (understandably) a bit slow to respond at this point. This is a repeat of a question I asked a few days ago. Maybe someone else will see it and have some insight (?).
>>
>> I have redone the opposite sideband null procedure in my KX3 (#8342) with KXFL3 filter board, using both the 2013 per-band null procedure, and the 2015 KXFL3 installation/calibration instructions. The procedures are essentially the same, with a minor difference in RIT setting, and the fact that the KXFL3 installation manual calls this out only on 20M rather than on each band individually.
>>
>> With my XG3 as a signal source, I get an excellent opposite sideband null using either FL1 or FL2 bandwidth settings on all bands. With narrow bandwidth and FL3 switched in, the null is very broad and shallow, and the opposite sideband is reduced only on the order of 10dB (+/-) rather than the very deep nulls (60+ dB) obtainable with FL1/FL2. As a result, the opposite sideband remains clearly audible when tuning across a signal — say CW at 500 Hz bandwidth, etc.
>>
>> If anyone else out there has done either of these procedures, did you get as deep a null with FL3 as with FL1/FL2? I’m trying to determine if this is normal, or if there's an issue in the radio, possibly with my KXFL3 board.
>>
>> Thanks … Grant NQ5T
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>______________________________________________________________
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>Post: mailto:[hidden email]
>
>This list hosted by: http://www.qsl.net
>Please help support this email list: http://www.qsl.net/donate.html
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len

Re: [KX3] Oppopsite Sideband Null question - Redux

In reply to this post by Mark Forsyth-2

By "up to date" I assume you mean firmware?

-----Original Message-----
From: [hidden email] [mailto:[hidden email]] On Behalf Of Mark Forsyth
Sent: Friday, June 12, 2020 10:18 PM
To: Grant Youngman <[hidden email]>
Cc: Elecraft Refl <[hidden email]>
Subject: Re: [Elecraft] [KX3] Oppopsite Sideband Null question - Redux

Hi,
Elecraft have a handy little utility called RxSbNull.exe which does the whole process. All you need is an up to date KX3, an up to date XG3, a Windows computer and the utility. It works like a charm. Turn the radio volume down before you start it though otherwise it’ll annoy the hell out of you.

Cheers
Mark Forsyth
http://jandmf.com
VK3KW

> On 12 Jun 2020, at 11:36 pm, Grant Youngman <[hidden email]> wrote:
>
> Elecraft Tech Support seems (understandably) a bit slow to respond at this point. This is a repeat of a question I asked a few days ago. Maybe someone else will see it and have some insight (?).
>
> I have redone the opposite sideband null procedure in my KX3 (#8342) with KXFL3 filter board, using both the 2013 per-band null procedure, and the 2015 KXFL3 installation/calibration instructions. The procedures are essentially the same, with a minor difference in RIT setting, and the fact that the KXFL3 installation manual calls this out only on 20M rather than on each band individually.
>
> With my XG3 as a signal source, I get an excellent opposite sideband null using either FL1 or FL2 bandwidth settings on all bands. With narrow bandwidth and FL3 switched in, the null is very broad and shallow, and the opposite sideband is reduced only on the order of 10dB (+/-) rather than the very deep nulls (60+ dB) obtainable with FL1/FL2. As a result, the opposite sideband remains clearly audible when tuning across a signal — say CW at 500 Hz bandwidth, etc.
>
> If anyone else out there has done either of these procedures, did you get as deep a null with FL3 as with FL1/FL2? I’m trying to determine if this is normal, or if there's an issue in the radio, possibly with my KXFL3 board.
>
> Thanks … Grant NQ5T
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net Please help support this email
> list: http://www.qsl.net/donate.html Message delivered to
> [hidden email]

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Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email]

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Grant Youngman-2

Re: [KX3] Oppopsite Sideband Null question - Redux

In reply to this post by Mark Forsyth-2

If you obtained this utility from Elecraft and used it, then you've done the opposite sideband null? Did you observe any difference in the nulls at FL3 bandwidths than you got with FL1/FL2 bandwidths?

The utility is probably one of many bits of automation ELecraft uses internally for test/manufacture that isn’t supported for customer use. If I were going to run per-band nulling for 1000 radios it would be essential. For one — the process isn’t all that bad :-)

Grant NQ5T

> On Jun 13, 2020, at 12:17 AM, Mark Forsyth <[hidden email]> wrote:
>
> Hi,
> Elecraft have a handy little utility called RxSbNull.exe which does the whole process. All you need is an up to date KX3, an up to date XG3, a Windows computer and the utility. It works like a charm. Turn the radio volume down before you start it though otherwise it’ll annoy the hell out of you.
>
> Cheers
> Mark Forsyth
> http://jandmf.com
> VK3KW
>

Mark Forsyth-2

Re: [KX3] Oppopsite Sideband Null question - Redux

In reply to this post by len

Yep. That’s exactly what I mean ...:-)

Cheers
Mark Forsyth
http://jandmf.com

> On 13 Jun 2020, at 11:11 pm, "[hidden email]" <[hidden email]> wrote:
>
> By "up to date" I assume you mean firmware?
>
>
> -----Original Message-----
> From: [hidden email] [mailto:[hidden email]] On Behalf Of Mark Forsyth
> Sent: Friday, June 12, 2020 10:18 PM
> To: Grant Youngman <[hidden email]>
> Cc: Elecraft Refl <[hidden email]>
> Subject: Re: [Elecraft] [KX3] Oppopsite Sideband Null question - Redux
>
> Hi,
> Elecraft have a handy little utility called RxSbNull.exe which does the whole process. All you need is an up to date KX3, an up to date XG3, a Windows computer and the utility. It works like a charm. Turn the radio volume down before you start it though otherwise it’ll annoy the hell out of you.
>
> Cheers
> Mark Forsyth
> http://jandmf.com
> VK3KW
>
>> On 12 Jun 2020, at 11:36 pm, Grant Youngman <[hidden email]> wrote:
>>
>> Elecraft Tech Support seems (understandably) a bit slow to respond at this point. This is a repeat of a question I asked a few days ago. Maybe someone else will see it and have some insight (?).
>>
>> I have redone the opposite sideband null procedure in my KX3 (#8342) with KXFL3 filter board, using both the 2013 per-band null procedure, and the 2015 KXFL3 installation/calibration instructions. The procedures are essentially the same, with a minor difference in RIT setting, and the fact that the KXFL3 installation manual calls this out only on 20M rather than on each band individually.
>>
>> With my XG3 as a signal source, I get an excellent opposite sideband null using either FL1 or FL2 bandwidth settings on all bands. With narrow bandwidth and FL3 switched in, the null is very broad and shallow, and the opposite sideband is reduced only on the order of 10dB (+/-) rather than the very deep nulls (60+ dB) obtainable with FL1/FL2. As a result, the opposite sideband remains clearly audible when tuning across a signal — say CW at 500 Hz bandwidth, etc.
>>
>> If anyone else out there has done either of these procedures, did you get as deep a null with FL3 as with FL1/FL2? I’m trying to determine if this is normal, or if there's an issue in the radio, possibly with my KXFL3 board.
>>
>> Thanks … Grant NQ5T
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net Please help support this email
>> list: http://www.qsl.net/donate.html Message delivered to
>> [hidden email]
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email]
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

Grant Youngman-2

Re: [KX3] Oppopsite Sideband Null question - Redux

So given that this is on a German blog site, I’m going to guess that it’s third party and not straight from an Elecraft test bench (?). Does it report out null depth found for each band/bandwidth combination or just run through them presuming everything else is hunky dory.

Grant NQ5T

> On Jun 13, 2020, at 10:47 AM, Mark Forsyth <[hidden email]> wrote:
>
> Yep. That’s exactly what I mean ...:-)
>
> Cheers
> Mark Forsyth
> http://jandmf.com
>
>> On 13 Jun 2020, at 11:11 pm, "[hidden email]" <[hidden email]> wrote:
>>
>> By "up to date" I assume you mean firmware?
>>
>>
>> -----Original Message-----
>> From: [hidden email] [mailto:[hidden email]] On Behalf Of Mark Forsyth
>> Sent: Friday, June 12, 2020 10:18 PM
>> To: Grant Youngman <[hidden email]>
>> Cc: Elecraft Refl <[hidden email]>
>> Subject: Re: [Elecraft] [KX3] Oppopsite Sideband Null question - Redux
>>
>> Hi,
>> Elecraft have a handy little utility called RxSbNull.exe which does the whole process. All you need is an up to date KX3, an up to date XG3, a Windows computer and the utility. It works like a charm. Turn the radio volume down before you start it though otherwise it’ll annoy the hell out of you.
>>

AL7CR

Re: [KX3] Oppopsite Sideband Null question - Redux

Looks like it is available here:

https://kx3-blog.de/?p=200

On Sat, Jun 13, 2020, at 8:02 AM, Grant Youngman wrote:

> So given that this is on a German blog site, I’m going to guess that
> it’s third party and not straight from an Elecraft test bench (?).
> Does it report out null depth found for each band/bandwidth combination
> or just run through them presuming everything else is hunky dory.
>
> Grant NQ5T
>
> > On Jun 13, 2020, at 10:47 AM, Mark Forsyth <[hidden email]> wrote:
> >
> > Yep. That’s exactly what I mean ...:-)
> >
> > Cheers
> > Mark Forsyth
> > http://jandmf.com
> >
> >> On 13 Jun 2020, at 11:11 pm, "[hidden email]" <[hidden email]> wrote:
> >>
> >> By "up to date" I assume you mean firmware?
> >>
> >>
> >> -----Original Message-----
> >> From: [hidden email] [mailto:[hidden email]] On Behalf Of Mark Forsyth
> >> Sent: Friday, June 12, 2020 10:18 PM
> >> To: Grant Youngman <[hidden email]>
> >> Cc: Elecraft Refl <[hidden email]>
> >> Subject: Re: [Elecraft] [KX3] Oppopsite Sideband Null question - Redux
> >>
> >> Hi,
> >> Elecraft have a handy little utility called RxSbNull.exe which does the whole process. All you need is an up to date KX3, an up to date XG3, a Windows computer and the utility. It works like a charm. Turn the radio volume down before you start it though otherwise it’ll annoy the hell out of you.
> >>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]