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Shift 0.1

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Mike K5NU

Shift 0.1

Crafters,

I have just installed 3.25 beta. Maybe I am blind to an obvious setting etc., but when I change from shift 0.1 to 0.5, my 2.7 filter bandwidth sure sounds better. At the shift setting 0.1, the radio audio sounds puffy noisy at the same settings at the 2.7 bandwidth. Have to stick to the 0.5 setting for now.

Maybe I will discover the difference, but so far I don't find it. The radio sounds terrible in the wider bandwidth filter with the shift setting at 0.1. Just my observation. Maybe erroneous.

Also when changing the shift settings, the radio goes to a narrower filter automatically as the change takes place. I guess that is how it is supposed to be.

Shortly put, the different shift settings in the menu make my radio sound different in the 2.7 filter range.

73, Mike K5NU
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Brett Howard

Re: Shift 0.1

Yea it seems that there is a lot more low frequency response when set
to .01 rather than .05. I get a lot of low frequency rumble out of the
speakers when in .01. I'll see if I can get some frequency response
captures of it...

On Wed, 2009-08-12 at 20:12 -0500, k5nu wrote:

> Crafters,
>
> I have just installed 3.25 beta. Maybe I am blind to an obvious setting etc., but when I change from shift 0.1 to 0.5, my 2.7 filter bandwidth sure sounds better. At the shift setting 0.1, the radio audio sounds puffy noisy at the same settings at the 2.7 bandwidth. Have to stick to the 0.5 setting for now.
>
> Maybe I will discover the difference, but so far I don't find it. The radio sounds terrible in the wider bandwidth filter with the shift setting at 0.1. Just my observation. Maybe erroneous.
>
> Also when changing the shift settings, the radio goes to a narrower filter automatically as the change takes place. I guess that is how it is supposed to be.
>
> Shortly put, the different shift settings in the menu make my radio sound different in the 2.7 filter range.
>
> 73, Mike K5NU
> ______________________________________________________________
> 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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Brett Howard

Re: Shift 0.1

Took a trace of what I was hearing...

http://www.livecomputers.com/K3/shift.01.jpg

red trace is 2.7Khz BW with shift=.05
green trace is 2.7Khz BW with shift=.01

On Wed, 2009-08-12 at 18:30 -0700, Brett Howard wrote:

> Yea it seems that there is a lot more low frequency response when set
> to .01 rather than .05. I get a lot of low frequency rumble out of the
> speakers when in .01. I'll see if I can get some frequency response
> captures of it...
>
> On Wed, 2009-08-12 at 20:12 -0500, k5nu wrote:
> > Crafters,
> >
> > I have just installed 3.25 beta. Maybe I am blind to an obvious setting etc., but when I change from shift 0.1 to 0.5, my 2.7 filter bandwidth sure sounds better. At the shift setting 0.1, the radio audio sounds puffy noisy at the same settings at the 2.7 bandwidth. Have to stick to the 0.5 setting for now.
> >
> > Maybe I will discover the difference, but so far I don't find it. The radio sounds terrible in the wider bandwidth filter with the shift setting at 0.1. Just my observation. Maybe erroneous.
> >
> > Also when changing the shift settings, the radio goes to a narrower filter automatically as the change takes place. I guess that is how it is supposed to be.
> >
> > Shortly put, the different shift settings in the menu make my radio sound different in the 2.7 filter range.
> >
> > 73, Mike K5NU
> > ______________________________________________________________
> > 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
>

Brett Howard

Re: Shift 0.1

Please disregard the other random junk this is a sound card that is built into the mother board.

On Wed, 2009-08-12 at 18:51 -0700, Brett Howard wrote:

> Took a trace of what I was hearing...
>
> http://www.livecomputers.com/K3/shift.01.jpg
>
> red trace is 2.7Khz BW with shift=.05
> green trace is 2.7Khz BW with shift=.01
>
> On Wed, 2009-08-12 at 18:30 -0700, Brett Howard wrote:
> > Yea it seems that there is a lot more low frequency response when set
> > to .01 rather than .05. I get a lot of low frequency rumble out of the
> > speakers when in .01. I'll see if I can get some frequency response
> > captures of it...
> >

Vic K2VCO

Re: Shift 0.1

In reply to this post by Mike K5NU

k5nu wrote:
> Crafters,
>
> I have just installed 3.25 beta. Maybe I am blind to an obvious setting etc., but when
> I change from shift 0.1 to 0.5, my 2.7 filter bandwidth sure sounds better. At the
> shift setting 0.1, the radio audio sounds puffy noisy at the same settings at the 2.7
> bandwidth. Have to stick to the 0.5 setting for now.

Wayne is aware of this and is looking at it.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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Charles Johnson-2-3

Re: Shift 0.1

In reply to this post by Mike K5NU

Same here.....definitely not what I would have expected.....back to .5
for me.....73, Charlie, K4ZRJ

k5nu wrote:

drewko

Re: Shift 0.1

In reply to this post by Mike K5NU

On Wed, 12 Aug 2009 20:12:29 -0500, Mike K5NU wrote:

>
>Also when changing the shift settings, the radio goes to a narrower filter automatically as the change takes place. I guess that is how it is supposed to be.
>

That won't bother me unless I end up having to frequently switch back
and forth between the 0.1 and 0.5 option in the Config menu. Regarding
that...

The SHIFT range is also reduced when the 10 Hz step is selected, which
means you probably will want to change between the 0.1 setting and the
0.5 setting depending on whether you are using a narrow or wide filter
width.

Could this be made to be automatic? I.e., when wider filter widths are
chosen the 50 Hz step would be automatically selected; when narrow
filter widths are chosen the 10 Hz step would automatically come into
force. That would be a lot more convenient. (I am assuming nobody
needs, for example, a 10Hz SHIFT step when they are using a 2.5 KHz
WIDTH setting...)

73,
Drew
AF2Z

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