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(K3) Filter Set-up

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Rich-3

(K3) Filter Set-up

Hi

I have the 2.7, 1.8 and 250hz filters installed in FL1, FL2 and FL3 in my
K3.

Using the width I can change these filters and see the filter change as I
get narrower. When I get to FL3 which has the 250hz filter, the noise level
disappears totally and there is nothing on the S-meter.

When on 0.30 BW there is about S3 of noise.

This happens in any mode, CW or DATA.

I have looked at the filter set-up using the K3 program on my pc and can't
see anything.

Could it be a duff filter or is there anything else I can check?

Thanks

Rich
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Bill Frantz

Re: (K3) Filter Set-up

Off the top of my head:

It sounds like the signal isn't getting through the 250 Hz filter when you have it selected.

Double check that it is installed correctly.

Double check you activated the correct slot in the CONFIG menu.

The XFIL button will allow you to switch filters without changing the DSP bandwidth.

Good luck Bill AE6JV

On 9/27/14 at 9:29 PM, [hidden email] (Rich) wrote:

> I have the 2.7, 1.8 and 250hz filters installed in FL1, FL2 and FL3 in my
> K3.
>
> Using the width I can change these filters and see the filter change as I
> get narrower. When I get to FL3 which has the 250hz filter, the noise level
> disappears totally and there is nothing on the S-meter.
>
> When on 0.30 BW there is about S3 of noise.
>
> This happens in any mode, CW or DATA.
>
> I have looked at the filter set-up using the K3 program on my pc and can't
> see anything.
>
> Could it be a duff filter or is there anything else I can check?

---------------------------------------------------------------------------
Bill Frantz |"After all, if the conventional wisdom was working, the
408-356-8506 | rate of systems being compromised would be going down,
www.pwpconsult.com | wouldn't it?" -- Marcus Ranum

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Matt Zilmer-3

Re: (K3) Filter Set-up

After you've done what Bill suggested, try setting the loss (dB) for
this filter, using the K3 Utility program. I believe the equivalent
filter loss is 3-4 dB. This would be normal. The K3 can compensate
for it, as long as you set the value (otherwise assumed to be 0 dB).

Be sure the filter width and offset is set correctly. Easiest way is
to use the K3 Utility program.

73,
matt
W6NIA

On Fri, 26 Sep 2014 22:40:12 -0700, you wrote:

>Off the top of my head:
>
>It sounds like the signal isn't getting through the 250 Hz filter when you have it selected.
>
>Double check that it is installed correctly.
>
>Double check you activated the correct slot in the CONFIG menu.
>
>The XFIL button will allow you to switch filters without changing the DSP bandwidth.
>
>Good luck Bill AE6JV
>
>On 9/27/14 at 9:29 PM, [hidden email] (Rich) wrote:
>
>> I have the 2.7, 1.8 and 250hz filters installed in FL1, FL2 and FL3 in my
>> K3.
>>
>> Using the width I can change these filters and see the filter change as I
>> get narrower. When I get to FL3 which has the 250hz filter, the noise level
>> disappears totally and there is nothing on the S-meter.
>>
>> When on 0.30 BW there is about S3 of noise.
>>
>> This happens in any mode, CW or DATA.
>>
>> I have looked at the filter set-up using the K3 program on my pc and can't
>> see anything.
>>
>> Could it be a duff filter or is there anything else I can check?
>---------------------------------------------------------------------------
>Bill Frantz |"After all, if the conventional wisdom was working, the
>408-356-8506 | rate of systems being compromised would be going down,
>www.pwpconsult.com | wouldn't it?" -- Marcus Ranum
>
>______________________________________________________________
>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]

Matt Zilmer, W6NIA
--
"Give me six hours to chop down a tree and I will
spend the first four sharpening the axe." -A. Lincoln
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Bruce Beford-4

Re: (K3) Filter Set-up

In reply to this post by Rich-3

In addition to the other suggestions you have received (assuming still no
signal through the filter), you may want to try the filter in another slot.
Early on, I had the same problem after installing a 250 Hz filter. the
problem ended up being a coupling cap on the circuit board with no solder on
one end. I was able to find it, and touch it up myself. Mine was a fairly
early unit (s/n 559).

GL,

Bruce

N1RX

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Elecraft mailing list

Re: (K3) Filter Set-up

I also had a solder problem with one of the filter slot steering diodes
on one of my K3's. It was only soldered on one end.
Chuck
W6RD
On 9/27/2014 7:52 AM, Bruce Beford wrote:

> In addition to the other suggestions you have received (assuming still no
> signal through the filter), you may want to try the filter in another slot.
> Early on, I had the same problem after installing a 250 Hz filter. the
> problem ended up being a coupling cap on the circuit board with no solder on
> one end. I was able to find it, and touch it up myself. Mine was a fairly
> early unit (s/n 559).
>
>
>
> GL,
>
> Bruce
>
> N1RX
>
> ______________________________________________________________
> 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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Rich-3

Re: (K3) Filter Set-up

In reply to this post by Matt Zilmer-3

Thanks for the tips.

This morning I moved the filter from FL3 to FL4, have used the K3 utility
program to set it up in this slot and have tried 3 and 4 dB of gain but I
still get the same.

Will email support to see what they say.

73

Rich

On 27 September 2014 15:10, Matt Zilmer <[hidden email]> wrote:

> After you've done what Bill suggested, try setting the loss (dB) for
> this filter, using the K3 Utility program. I believe the equivalent
> filter loss is 3-4 dB. This would be normal. The K3 can compensate
> for it, as long as you set the value (otherwise assumed to be 0 dB).
>
> Be sure the filter width and offset is set correctly. Easiest way is
> to use the K3 Utility program.
>
> 73,
> matt
> W6NIA
>
> On Fri, 26 Sep 2014 22:40:12 -0700, you wrote:
>
> >Off the top of my head:
> >
> >It sounds like the signal isn't getting through the 250 Hz filter when
> you have it selected.
> >
> >Double check that it is installed correctly.
> >
> >Double check you activated the correct slot in the CONFIG menu.
> >
> >The XFIL button will allow you to switch filters without changing the DSP
> bandwidth.
> >
> >Good luck Bill AE6JV
> >
> >On 9/27/14 at 9:29 PM, [hidden email] (Rich) wrote:
> >
> >> I have the 2.7, 1.8 and 250hz filters installed in FL1, FL2 and FL3 in
> my
> >> K3.
> >>
> >> Using the width I can change these filters and see the filter change as
> I
> >> get narrower. When I get to FL3 which has the 250hz filter, the noise
> level
> >> disappears totally and there is nothing on the S-meter.
> >>
> >> When on 0.30 BW there is about S3 of noise.
> >>
> >> This happens in any mode, CW or DATA.
> >>
> >> I have looked at the filter set-up using the K3 program on my pc and
> can't
> >> see anything.
> >>
> >> Could it be a duff filter or is there anything else I can check?
>
> >---------------------------------------------------------------------------
> >Bill Frantz |"After all, if the conventional wisdom was working,
> the
> >408-356-8506 | rate of systems being compromised would be going
> down,
> >www.pwpconsult.com | wouldn't it?" -- Marcus Ranum
> >
> >______________________________________________________________
> >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]
> Matt Zilmer, W6NIA
> --
> "Give me six hours to chop down a tree and I will
> spend the first four sharpening the axe." -A. Lincoln
>