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Need to shift 8 pole 2.1 filter?

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kcflyers

Need to shift 8 pole 2.1 filter?

My K3 has 2.8 and 2.1 8 pole filters in both main and sub receivers. Set up for zero offset per manual. When I switch to 2.1 filter, I need to use the Shift control to make receive audio sound approx normal. Perhaps 3/4 khz shift. Is this normal? When using the 2.8 filters, no shift is needed.

Don Wilhelm-4

Re: Need to shift 8 pole 2.1 filter?

You apparently are changing the filter width with the WIDTH control -
which moves both the high and low end of the filter width, so it cuts
out a good part of the lows in the SSB received signal. To get those
lows back, you must use the SHIFT.

To make things easier, switch to the LO-CUT-HI selection and reduce the
width using only the HI - cut knob. You will not have to adjust
anything else to make the voice recognizable and intelligible because
the lows in the voice are retained.

Further explanation - when you change the width from 2.8 to 2.1, you
reduce the width by 700 Hz, and that is 350 Hz from both the high end
and the low end. If you started with an audio passband of 200 Hz to
3000 Hz, the resulting passband after the width reduction is 550 Hz to
2450 Hz - that is too much reduction of the lows to be intelligible, so
you have to shift downward by 350 Hz to make it intelligible again, and
with a passband from 200 Hz to 2300 Hz.

73,
Don W3FPR

On 4/14/2011 2:44 PM, kcflyers wrote:
> My K3 has 2.8 and 2.1 8 pole filters in both main and sub receivers. Set up
> for zero offset per manual. When I switch to 2.1 filter, I need to use the
> Shift control to make receive audio sound approx normal. Perhaps 3/4 khz
> shift. Is this normal? When using the 2.8 filters, no shift is needed.
>
>
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kcflyers

Re: Need to shift 8 pole 2.1 filter?

In reply to this post by kcflyers

I am running K3 remotely using TRX Manager. When in the 2.8 filter the shift display is centered on the TRX display, and display below shows 2800. When switching to 2.1, the shift display is still centered. I did notice that the width control slider moves up (by itself), and width display at bottom goes from 2800 to 2100. I did not manually change the width control. So in this situation, I have to move the shift slider to offset from being centered. This is an inconvenience when switching back and forth between filters.

I am not at my K3, so can't check what happens when I just change filters, whether same as above (requiring shift), or not.

Guy, K2AV

Re: Need to shift 8 pole 2.1 filter?

Oh, remote controlled... That would be the app programmer's issue,
not Elecraft. TRX Manager does not appear to acknowledge any support
for Elecraft on their web page. Sort of whatever works, fine,
whatever doesn't, too bad attitude, if they even care. Just marginal
support for TenTec.

I believe you need to negotiate a feature with the programmer of TRX
Manager. Like maybe supporting Elecraft outright? You can program a
macro to set your preferred shift setting IF you can send a macro
string to the K3. See the current K3 programmer's guide.
BW2100;IF1350; if you want to start hearing at 300 Hz.

You want to base your choice of rigs on the 3rd party software, or
base your choice of 3rd party software on your rig?

If you attempt to solve this by setting the filter calibration offset
in the K3 utility, it will work OK for one sideband, but turn the
other into Donald Duck. Don't go there. That is only establishing for
the rig where the crystal's center frequency actually is, so it can
respond to offsetting commands in the firmware.

73, Guy.

On Thu, Apr 14, 2011 at 4:09 PM, kcflyers <[hidden email]> wrote:

> I am running K3 remotely using TRX Manager. When in the 2.8 filter the shift
> display is centered on the TRX display, and display below shows 2800. When
> switching to 2.1, the shift display is still centered. I did notice that
> the width control slider moves up (by itself), and width display at bottom
> goes from 2800 to 2100. I did not manually change the width control. So
> in this situation, I have to move the shift slider to offset from being
> centered. This is an inconvenience when switching back and forth between
> filters.
>
> I am not at my K3, so can't check what happens when I just change filters,
> whether same as above (requiring shift), or not.
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/Need-to-shift-8-pole-2-1-filter-tp6273972p6274222.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> 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
>

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n7ws

Re: Need to shift 8 pole 2.1 filter?

In reply to this post by kcflyers

I don't know a thing about TRX Manager, but when operating locally, for voice modes I default to Lo-Hi cut on the bandwidth settings and Shift-Width for CW and Data modes.

--- On Thu, 4/14/11, kcflyers <[hidden email]> wrote:

> I am running K3 remotely using TRX
> Manager. When in the 2.8 filter the shift
> display is centered on the TRX display, and display below
> shows 2800. When
> switching to 2.1, the shift display is still
> centered. I did notice that
> the width control slider moves up (by itself), and width
> display at bottom
> goes from 2800 to 2100. I did not manually
> change the width control. So
> in this situation, I have to move the shift slider to
> offset from being
> centered. This is an inconvenience when switching
> back and forth between
> filters.
>
> I am not at my K3, so can't check what happens when I just
> change filters,
> whether same as above (requiring shift), or not.
>

Guy, K2AV

Re: Need to shift 8 pole 2.1 filter?

In reply to this post by Guy, K2AV

Out in plain view: http://www.trx-manager.com/FTmane.htm

On Thu, Apr 14, 2011 at 7:53 PM, John and Judy Raydo <[hidden email]>wrote:

> TRX Manager is highly customized and fully supported for K3. Not sure
> where you looked.
>
> Anyway, I now agree with you that shifting filter offset would just add
> LSB/USB problems.
>
> Thanks for comments. JOhn.
>
> --- On *Thu, 4/14/11, Guy Olinger K2AV <[hidden email]>* wrote:
>
>
> From: Guy Olinger K2AV <[hidden email]>
> Subject: Re: [Elecraft] Need to shift 8 pole 2.1 filter?
> To: "kcflyers" <[hidden email]>
> Cc: [hidden email]
> Date: Thursday, April 14, 2011, 6:36 PM
>
>
> Oh, remote controlled... That would be the app programmer's issue,
> not Elecraft. TRX Manager does not appear to acknowledge any support
> for Elecraft on their web page. Sort of whatever works, fine,
> whatever doesn't, too bad attitude, if they even care. Just marginal
> support for TenTec.
>
> I believe you need to negotiate a feature with the programmer of TRX
> Manager. Like maybe supporting Elecraft outright? You can program a
> macro to set your preferred shift setting IF you can send a macro
> string to the K3. See the current K3 programmer's guide.
> BW2100;IF1350; if you want to start hearing at 300 Hz.
>
> You want to base your choice of rigs on the 3rd party software, or
> base your choice of 3rd party software on your rig?
>
> If you attempt to solve this by setting the filter calibration offset
> in the K3 utility, it will work OK for one sideband, but turn the
> other into Donald Duck. Don't go there. That is only establishing for
> the rig where the crystal's center frequency actually is, so it can
> respond to offsetting commands in the firmware.
>
> 73, Guy.
>
>
> On Thu, Apr 14, 2011 at 4:09 PM, kcflyers <[hidden email]<http://us.mc1147.mail.yahoo.com/mc/compose?to=kcflyers@...>>
> wrote:
> > I am running K3 remotely using TRX Manager. When in the 2.8 filter the
> shift
> > display is centered on the TRX display, and display below shows 2800.
> When
> > switching to 2.1, the shift display is still centered. I did notice that
> > the width control slider moves up (by itself), and width display at
> bottom
> > goes from 2800 to 2100. I did not manually change the width control.
> So
> > in this situation, I have to move the shift slider to offset from being
> > centered. This is an inconvenience when switching back and forth between
> > filters.
> >
> > I am not at my K3, so can't check what happens when I just change
> filters,
> > whether same as above (requiring shift), or not.
> >
> > --
> > View this message in context:
> http://elecraft.365791.n2.nabble.com/Need-to-shift-8-pole-2-1-filter-tp6273972p6274222.html
> > Sent from the Elecraft mailing list archive at Nabble.com.
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]<http://us.mc1147.mail.yahoo.com/mc/compose?to=Elecraft@...>
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> >
>
>

Iain MacDonnell - N6ML-2

Re: Need to shift 8 pole 2.1 filter?

In reply to this post by Guy, K2AV

You'll have the same problem if you NORMalise in SSB mode, then use
the XFIL button to select a narrower filter - it'll still be centered
on 1.50. It'd be nice if the NORMalise function for SSB mode could be
configurable, and if selecting other filters could, perhaps, adjust
the shift so that, effectively, the LO-cut stays the same. Personally,
I have a 1.8kHz filter, and use 1.8kHz all the time for SSB - I see no
need to let any more than that though to my ears... but I'm not an SSB
rag-chewer......

~iain / N6ML

On Thu, Apr 14, 2011 at 11:36 PM, Guy Olinger K2AV
<[hidden email]> wrote:

> Oh, remote controlled... That would be the app programmer's issue,
> not Elecraft. TRX Manager does not appear to acknowledge any support
> for Elecraft on their web page. Sort of whatever works, fine,
> whatever doesn't, too bad attitude, if they even care. Just marginal
> support for TenTec.
>
> I believe you need to negotiate a feature with the programmer of TRX
> Manager. Like maybe supporting Elecraft outright? You can program a
> macro to set your preferred shift setting IF you can send a macro
> string to the K3. See the current K3 programmer's guide.
> BW2100;IF1350; if you want to start hearing at 300 Hz.
>
> You want to base your choice of rigs on the 3rd party software, or
> base your choice of 3rd party software on your rig?
>
> If you attempt to solve this by setting the filter calibration offset
> in the K3 utility, it will work OK for one sideband, but turn the
> other into Donald Duck. Don't go there. That is only establishing for
> the rig where the crystal's center frequency actually is, so it can
> respond to offsetting commands in the firmware.
>
> 73, Guy.
>
>
> On Thu, Apr 14, 2011 at 4:09 PM, kcflyers <[hidden email]> wrote:
>> I am running K3 remotely using TRX Manager. When in the 2.8 filter the shift
>> display is centered on the TRX display, and display below shows 2800. When
>> switching to 2.1, the shift display is still centered. I did notice that
>> the width control slider moves up (by itself), and width display at bottom
>> goes from 2800 to 2100. I did not manually change the width control. So
>> in this situation, I have to move the shift slider to offset from being
>> centered. This is an inconvenience when switching back and forth between
>> filters.
>>
>> I am not at my K3, so can't check what happens when I just change filters,
>> whether same as above (requiring shift), or not.
>>
>> --
>> View this message in context: http://elecraft.365791.n2.nabble.com/Need-to-shift-8-pole-2-1-filter-tp6273972p6274222.html
>> Sent from the Elecraft mailing list archive at Nabble.com.
>> ______________________________________________________________
>> 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
>>
> ______________________________________________________________
> 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
>

kcflyers

Re: Need to shift 8 pole 2.1 filter?

Iain, I'm going to forward your comments to Laurent at TRX Manager. Thanks. John.

--- On Thu, 4/14/11, iain macdonnell - N6ML <[hidden email]> wrote:

From: iain macdonnell - N6ML <[hidden email]>
Subject: Re: [Elecraft] Need to shift 8 pole 2.1 filter?
To: "Guy Olinger K2AV" <[hidden email]>
Cc: "kcflyers" <[hidden email]>, [hidden email]
Date: Thursday, April 14, 2011, 7:32 PM

You'll have the same problem if you NORMalise in SSB mode, then use
the XFIL button to select a narrower filter - it'll still be centered
on 1.50. It'd be nice if the NORMalise function for SSB mode could be
configurable, and if selecting other filters could, perhaps, adjust
the shift so that, effectively, the LO-cut stays the same. Personally,
I have a 1.8kHz filter, and use 1.8kHz all the time for SSB - I see no
need to let any more than that though to my ears... but I'm not an SSB
rag-chewer......

~iain / N6ML

On Thu, Apr 14, 2011 at 11:36 PM, Guy Olinger K2AV
<[hidden email]> wrote:

Don Wilhelm-4

Re: Need to shift 8 pole 2.1 filter?

In reply to this post by Iain MacDonnell - N6ML-2

Iain,

That is why it is easier to use the HI - cut knob to change filters in
SSB mode rather than the XFIL button.
The center frequency is automatically shifted along with the reduction
in the high end.

I have heard this "problem" many times, and there seems to be a lot of
resistance to using the "fix" that was built into the K3 from the very
start.

73,
Don W3FPR

On 4/14/2011 8:32 PM, iain macdonnell - N6ML wrote:

> You'll have the same problem if you NORMalise in SSB mode, then use
> the XFIL button to select a narrower filter - it'll still be centered
> on 1.50. It'd be nice if the NORMalise function for SSB mode could be
> configurable, and if selecting other filters could, perhaps, adjust
> the shift so that, effectively, the LO-cut stays the same. Personally,
> I have a 1.8kHz filter, and use 1.8kHz all the time for SSB - I see no
> need to let any more than that though to my ears... but I'm not an SSB
> rag-chewer......
>
> ~iain / N6ML
>

Don Wilhelm-4

Re: Need to shift 8 pole 2.1 filter?

In reply to this post by Guy, K2AV

Yes, I see it - read and weep if your needs are not present in that
set of commands that are provided for your transceiver. He is not very
specific about it.

For those who overlooked it, this is the bothersome quote for me:
Quote:
Note: Each transceiver may have only 20 but also 50 or more than 100 CAT
functions. TRX-manager does not support all of them for each
transceiver. There is no table of the available functions (~5000-10000
case ?). Generally, almost all real-time functions are supported. Macros
are provided to suit particular needs.
EndQuote.

73,
Don W3FPR

On 4/14/2011 8:03 PM, Guy Olinger K2AV wrote:

> Out in plain view: http://www.trx-manager.com/FTmane.htm
>
> On Thu, Apr 14, 2011 at 7:53 PM, John and Judy Raydo<[hidden email]>wrote:
>
>> TRX Manager is highly customized and fully supported for K3. Not sure
>> where you looked.
>>
>> Anyway, I now agree with you that shifting filter offset would just add
>> LSB/USB problems.
>>
>> Thanks for comments. JOhn.
>>
>> --- On *Thu, 4/14/11, Guy Olinger K2AV<[hidden email]>* wrote:
>>
>>
>> From: Guy Olinger K2AV<[hidden email]>
>> Subject: Re: [Elecraft] Need to shift 8 pole 2.1 filter?
>> To: "kcflyers"<[hidden email]>
>> Cc: [hidden email]
>> Date: Thursday, April 14, 2011, 6:36 PM
>>
>>
>> Oh, remote controlled... That would be the app programmer's issue,
>> not Elecraft. TRX Manager does not appear to acknowledge any support
>> for Elecraft on their web page. Sort of whatever works, fine,
>> whatever doesn't, too bad attitude, if they even care. Just marginal
>> support for TenTec.
>>
>> I believe you need to negotiate a feature with the programmer of TRX
>> Manager. Like maybe supporting Elecraft outright? You can program a
>> macro to set your preferred shift setting IF you can send a macro
>> string to the K3. See the current K3 programmer's guide.
>> BW2100;IF1350; if you want to start hearing at 300 Hz.
>>
>> You want to base your choice of rigs on the 3rd party software, or
>> base your choice of 3rd party software on your rig?
>>
>> If you attempt to solve this by setting the filter calibration offset
>> in the K3 utility, it will work OK for one sideband, but turn the
>> other into Donald Duck. Don't go there. That is only establishing for
>> the rig where the crystal's center frequency actually is, so it can
>> respond to offsetting commands in the firmware.
>>
>> 73, Guy.
>>
>>
>> On Thu, Apr 14, 2011 at 4:09 PM, kcflyers<[hidden email]<http://us.mc1147.mail.yahoo.com/mc/compose?to=kcflyers@...>>
>> wrote:
>>> I am running K3 remotely using TRX Manager. When in the 2.8 filter the
>> shift
>>> display is centered on the TRX display, and display below shows 2800.
>> When
>>> switching to 2.1, the shift display is still centered. I did notice that
>>> the width control slider moves up (by itself), and width display at
>> bottom
>>> goes from 2800 to 2100. I did not manually change the width control.
>> So
>>> in this situation, I have to move the shift slider to offset from being
>>> centered. This is an inconvenience when switching back and forth between
>>> filters.
>>>
>>> I am not at my K3, so can't check what happens when I just change
>> filters,
>>> whether same as above (requiring shift), or not.
>>>
>>> --
>>> View this message in context:
>> http://elecraft.365791.n2.nabble.com/Need-to-shift-8-pole-2-1-filter-tp6273972p6274222.html
>>> Sent from the Elecraft mailing list archive at Nabble.com.
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]<http://us.mc1147.mail.yahoo.com/mc/compose?to=Elecraft@...>
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>>
>>
> ______________________________________________________________
> 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
>

kcflyers

Re: Need to shift 8 pole 2.1 filter?

In reply to this post by Don Wilhelm-4

Don, I'm running K3 via TRX Manager, and I don't have a HI cut control From what I see, only have XFIL, Shift, and Width controls. Don't see a Hi/Lo command set in programmers guide, either.

John.

Greg - AB7R

Re: Need to shift 8 pole 2.1 filter?

In reply to this post by kcflyers

Laurent is usually very open to suggestions and does a great job
supporting the K3.

73
Greg
AB7R

On 4/14/2011 5:44 PM, John and Judy Raydo wrote:

> Iain, I'm going to forward your comments to Laurent at TRX Manager. Thanks. John.
>
>
> --- On Thu, 4/14/11, iain macdonnell - N6ML<[hidden email]> wrote:
>
>
> From: iain macdonnell - N6ML<[hidden email]>
> Subject: Re: [Elecraft] Need to shift 8 pole 2.1 filter?
> To: "Guy Olinger K2AV"<[hidden email]>
> Cc: "kcflyers"<[hidden email]>, [hidden email]
> Date: Thursday, April 14, 2011, 7:32 PM
>
>
> You'll have the same problem if you NORMalise in SSB mode, then use
> the XFIL button to select a narrower filter - it'll still be centered
> on 1.50. It'd be nice if the NORMalise function for SSB mode could be
> configurable, and if selecting other filters could, perhaps, adjust
> the shift so that, effectively, the LO-cut stays the same. Personally,
> I have a 1.8kHz filter, and use 1.8kHz all the time for SSB - I see no
> need to let any more than that though to my ears... but I'm not an SSB
> rag-chewer......
>
> ~iain / N6ML
>
>
>
> On Thu, Apr 14, 2011 at 11:36 PM, Guy Olinger K2AV
> <[hidden email]> wrote:
>> Oh, remote controlled... That would be the app programmer's issue,
>> not Elecraft. TRX Manager does not appear to acknowledge any support
>> for Elecraft on their web page. Sort of whatever works, fine,
>> whatever doesn't, too bad attitude, if they even care. Just marginal
>> support for TenTec.
>>
>> I believe you need to negotiate a feature with the programmer of TRX
>> Manager. Like maybe supporting Elecraft outright? You can program a
>> macro to set your preferred shift setting IF you can send a macro
>> string to the K3. See the current K3 programmer's guide.
>> BW2100;IF1350; if you want to start hearing at 300 Hz.
>>
>> You want to base your choice of rigs on the 3rd party software, or
>> base your choice of 3rd party software on your rig?
>>
>> If you attempt to solve this by setting the filter calibration offset
>> in the K3 utility, it will work OK for one sideband, but turn the
>> other into Donald Duck. Don't go there. That is only establishing for
>> the rig where the crystal's center frequency actually is, so it can
>> respond to offsetting commands in the firmware.
>>
>> 73, Guy.
>>
>>
>> On Thu, Apr 14, 2011 at 4:09 PM, kcflyers<[hidden email]> wrote:
>>> I am running K3 remotely using TRX Manager. When in the 2.8 filter the shift
>>> display is centered on the TRX display, and display below shows 2800. When
>>> switching to 2.1, the shift display is still centered. I did notice that
>>> the width control slider moves up (by itself), and width display at bottom
>>> goes from 2800 to 2100. I did not manually change the width control. So
>>> in this situation, I have to move the shift slider to offset from being
>>> centered. This is an inconvenience when switching back and forth between
>>> filters.
>>>
>>> I am not at my K3, so can't check what happens when I just change filters,
>>> whether same as above (requiring shift), or not.
>>>
>>> --
>>> View this message in context: http://elecraft.365791.n2.nabble.com/Need-to-shift-8-pole-2-1-filter-tp6273972p6274222.html
>>> Sent from the Elecraft mailing list archive at Nabble.com.
>>> ______________________________________________________________
>>> 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
>>>
>> ______________________________________________________________
>> 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
>>
> ______________________________________________________________
> 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
>

Iain MacDonnell - N6ML-2

Re: Need to shift 8 pole 2.1 filter?

In reply to this post by Don Wilhelm-4

Hi Don,

Yes, that's what I do (on the very rare occasions when I change from
my 1.8kHz configuration and need to return). Unfortunately, though,
most rig-control programs don't have the HI and LO-cut controls (in
fact there are no "CAT" command versions of them, AFAIK!), so if you
can't physically reach for the knob on the rig, you're stuck with
WIDTH and SHIFT (BW and IS).

I have a macro in DXLabs Commander that sets me up for SSB. Amongst
various other things it does "BW0180;" and "IS 1050;".

73,

~iain / N6ML

On Fri, Apr 15, 2011 at 12:50 AM, Don Wilhelm <[hidden email]> wrote:

> Iain,
>
> That is why it is easier to use the HI - cut knob to change filters in SSB
> mode rather than the XFIL button.
> The center frequency is automatically shifted along with the reduction in
> the high end.
>
> I have heard this "problem" many times, and there seems to be a lot of
> resistance to using the "fix" that was built into the K3 from the very
> start.
>
> 73,
> Don W3FPR
>
>
>
> On 4/14/2011 8:32 PM, iain macdonnell - N6ML wrote:
>>
>> You'll have the same problem if you NORMalise in SSB mode, then use
>> the XFIL button to select a narrower filter - it'll still be centered
>> on 1.50. It'd be nice if the NORMalise function for SSB mode could be
>> configurable, and if selecting other filters could, perhaps, adjust
>> the shift so that, effectively, the LO-cut stays the same. Personally,
>> I have a 1.8kHz filter, and use 1.8kHz all the time for SSB - I see no
>> need to let any more than that though to my ears... but I'm not an SSB
>> rag-chewer......
>>
>> ~iain / N6ML
>>
>

kcflyers

Re: Need to shift 8 pole 2.1 filter?

In reply to this post by kcflyers

More re TRX Manager - the referenced window is NOT the main control screens for the K3. There are two screens with virtually every command included in the programmer's guide. Can't speak for other radios, but the K3 implementation is splendid. Re my note just above, I don't even see a Hi/Lo command listed in the programmer's guide.

Don Wilhelm-4

Re: Need to shift 8 pole 2.1 filter?

In reply to this post by kcflyers

That is only because TRX-manager does not "do the math" to shift the
filter center frequency.
It can easily be calculated from the current width and filter center
like what is done automatically for you inside the K3 when you turn the
Hi-cut knob. Yes, it is not provided as a separate command in the K3
programmers reference, but it is easy to do - move the center frequency
down (shift) by 1/2 of the frequency amount to be cut.

I was not saying or implying that it is available by means other than
the K3 knob, but it could easily be done by the software application if
the author is willing to "do the math". You might try asking.

73,
Don W3FPR

On 4/14/2011 9:05 PM, kcflyers wrote:

> Don, I'm running K3 via TRX Manager, and I don't have a HI cut control From
> what I see, only have XFIL, Shift, and Width controls. Don't see a Hi/Lo
> command set in programmers guide, either.
>
> John.
>
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kcflyers

Re: Need to shift 8 pole 2.1 filter?

I have put an inquiry into Laurent at TRX Manager. I think everyone that uses his product has found him to be very responsive to suggestions. I was a bit put-off by the implication that my initial inquiry on this topic was only due to "resistance" in using the K3 features. Not easy to do when there isn't a remote Lo/Hi knob. Anyway as a result of the various responses, I realize it would not be wise to shift the filter offset, and futher, now understand why I lose the "lows" (due to centering of the reduced passband).

73, John KØIZ

John, KD8K

Re: Need to shift 8 pole 2.1 filter?

In reply to this post by kcflyers

There is a way to adjust DSP Filters using Hi/Lo in Trx-Manger. In the
levels screen for the K3 (button below the Preamp in the main monitoring
screen) there is a window that will display a button which switches between
Shift/Width and Low/Hi. That allows Trx Manger to adjust the K3's Filters
using Hi/Lo instead of Shift/Width.

73,

John KD8K

On Thu, Apr 14, 2011 at 9:05 PM, kcflyers <[hidden email]> wrote:

> Don, I'm running K3 via TRX Manager, and I don't have a HI cut control
> From
> what I see, only have XFIL, Shift, and Width controls. Don't see a Hi/Lo
> command set in programmers guide, either.
>
> John.
>
> --
> View this message in context:
> http://elecraft.365791.n2.nabble.com/Need-to-shift-8-pole-2-1-filter-tp6273972p6274912.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> 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
>

kcflyers

Re: Need to shift 8 pole 2.1 filter?

John, the buttons I have below the shift and width sliders are >< and N, and below them are I/II and /. Are these the buttons you mean?

kcflyers

Re: Need to shift 8 pole 2.1 filter?

In reply to this post by John, KD8K

Just found it!!!! Never knew the slider/width caption was also a button. Thanks a bunch!

Laurent F6DEX

Re: Need to shift 8 pole 2.1 filter?

In reply to this post by Guy, K2AV

HI Guy, John

"TRX Manager does not appear to acknowledge any support for Elecraft on their web page. "
Sorry and thank you. "ELECRAFT" has now a better place !

John : the best for you is to set up "preferred filters" (HI and LO cut values) for NAR and WID Monitoring's filters.

73, Laurent F6DEX

Laurent F6DEX