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K3 Cw Filter Choices

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pastormg

K3 Cw Filter Choices

Good Morning, when I initially purchased the K3 I only had SSB filters put into the radio. Which is currently the 2.7 and 1.8. Would like to get back into CW and I was wondering which CW filter would be good for that purpose. Any help would be much appreciated. Thanks!! Mark KB3Z

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w0mu

Re: K3 Cw Filter Choices

I would opt for a 400hz filter.

Mike W0MU

W0MU-1 CC Cluster w0mu.net

On 12/15/2011 9:17 AM, [hidden email] wrote:

> Good Morning, when I initially purchased the K3 I only had SSB filters put into the radio. Which is currently the 2.7 and 1.8. Would like to get back into CW and I was wondering which CW filter would be good for that purpose. Any help would be much appreciated. Thanks!! Mark KB3Z
>
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Arie Kleingeld PA3A-2

Re: K3 Cw Filter Choices

In reply to this post by pastormg

Mark,

My opinion: select the filters that match your favorite working BW, just
like if you were buying them for a conventional transceiver.

73,
Arie PA3A

Op 15-12-2011 17:17, [hidden email] schreef:

Lou Kolb

Re: K3 Cw Filter Choices

In reply to this post by pastormg

I use the 400 hz filter for CW and find it is more than adequate for my
casual, rag-chewing oriented operation. Once i get a station tuned in
satisfactorily, I crank the DSP down to 100 hz or so and enjoy the quiet.
Lou WA3MIX
Lou kolb
Voice-over Artist:
Radio/TV Adds, Video narrations
Messages On-hold:
www.loukolb.com
----- Original Message -----
From: <[hidden email]>
To: <[hidden email]>
Sent: Thursday, December 15, 2011 11:17 AM
Subject: [Elecraft] K3 Cw Filter Choices

> Good Morning, when I initially purchased the K3 I only had SSB filters put
> into the radio. Which is currently the 2.7 and 1.8. Would like to get
> back into CW and I was wondering which CW filter would be good for that
> purpose. Any help would be much appreciated. Thanks!! Mark KB3Z
>
> ------------------------------
> Sent using Verizon.net Mobile
> ______________________________________________________________
> 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
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Bob K6UJ

Re: K3 Cw Filter Choices

In reply to this post by w0mu

Mark,

I second Mikes recommendation. I am using the 400hz filters in the main and sub receiver in my K3 and it performs superbly on CW.
With these filters and using the APF filter when needed for digging out the weak ones, the K3 is a CW operators DX dream radio.
I would recommend reading the write up "which filter should I buy?" on the Elecraft
order page for the K3, down on the bottom of the page, for information on their CW filters.

73,
Bob
K6UJ

On Dec 15, 2011, at 8:21 AM, W0MU Mike Fatchett wrote:

> I would opt for a 400hz filter.
>
> Mike W0MU
>
> W0MU-1 CC Cluster w0mu.net
>
>
> On 12/15/2011 9:17 AM, [hidden email] wrote:
>> Good Morning, when I initially purchased the K3 I only had SSB filters put into the radio. Which is currently the 2.7 and 1.8. Would like to get back into CW and I was wondering which CW filter would be good for that purpose. Any help would be much appreciated. Thanks!! Mark KB3Z
>>
>> ------------------------------
>> Sent using Verizon.net Mobile
>> ______________________________________________________________
>> 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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Jim Brown-10

Re: K3 Cw Filter Choices

In reply to this post by Lou Kolb

On 12/15/2011 8:36 AM, Lou Kolb wrote:
> I use the 400 hz filter for CW and find it is more than adequate for my
> casual, rag-chewing oriented operation. Once i get a station tuned in
> satisfactorily, I crank the DSP down to 100 hz or so and enjoy the quiet.

It's important to remember that the plug-in filters are ROOFING filters.
The function of traditional plug-in filters in other radios is provided
by DSP in the K3, so we can set the IF as narrow or as wide as we
desire. The primary effect ofl the plug-in filters is to protect the DSP
from overload by very strong signals very close to your frequency, and
in casual operation, that's not needed. You already have 2.7kHz and 1.8
kHz filter to do that. The time you need the narrow filter is during a
contest, when bands are crowded with big signals.

If I were you, I would try operating with the radio as is, and buy
another filter only if you decide to get into contesting. I'm a serious
contester, so I DO need those filters, but you probably don't need them.

73, Jim K9YC
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Dave Hachadorian

Re: K3 Cw Filter Choices

In reply to this post by pastormg

I like the 250, which is actually 370. I told the K3 it was 400,
so the filter is switched in at DSP BW 400. It works great on CW
and is perfect for RTTY.

The 400 is another good choice. It is actually 435, so there's
not much difference between 370 and 435.

Dave Hachadorian, K6LL
Yuma, AZ

-----Original Message-----
From: [hidden email]
Sent: Thursday, December 15, 2011 9:17 AM
To: [hidden email]
Subject: [Elecraft] K3 Cw Filter Choices

Good Morning, when I initially purchased the K3 I only had SSB
filters put into the radio. Which is currently the 2.7 and 1.8.
Would like to get back into CW and I was wondering which CW
filter would be good for that purpose. Any help would be much
appreciated. Thanks!! Mark KB3Z

------------------------------
Sent using Verizon.net Mobile
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http://www.qsl.net/donate.html

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Matt Murphy

Re: K3 Cw Filter Choices

I recommend the 1KHz over the 400Hz filter (if you're going to get one
filter) b/c without it you get a lot more IMD when you set the DSP width
anywhere above 400Hz. In a contest during a run I like to set the DSP
bandwidth to 600-800Hz. If someone is closer than 300-400Hz +- from my
frequency, I want to know about it since not all contest participants are
using K3s and I don't think it's safe to assume that all would-be calling
stations will be able to copy me if the station 350Hz away is very loud and
I'm not.

Since the output of the roofing filter is the input to the DSP, the DSP is
able to do a much better job at 500Hz if you have the 1KHz roofing filter
installed than if you just have a 2.x KHz filter installed.

Ideally you'd have one narrow roofing filter as well, but unless you
anticipate doing most of your operating with the width set to less than or
equal to 400Hz, I think your overall experience will be better with the
1KHz roofing filter + DSP.

On Thu, Dec 15, 2011 at 10:02 AM, Dave Hachadorian <[hidden email]> wrote:

> I like the 250, which is actually 370. I told the K3 it was 400,
> so the filter is switched in at DSP BW 400. It works great on CW
> and is perfect for RTTY.
>
> The 400 is another good choice. It is actually 435, so there's
> not much difference between 370 and 435.
>
>
> Dave Hachadorian, K6LL
> Yuma, AZ
>
>
>
> -----Original Message-----
> From: [hidden email]
> Sent: Thursday, December 15, 2011 9:17 AM
> To: [hidden email]
> Subject: [Elecraft] K3 Cw Filter Choices
>
> Good Morning, when I initially purchased the K3 I only had SSB
> filters put into the radio. Which is currently the 2.7 and 1.8.
> Would like to get back into CW and I was wondering which CW
> filter would be good for that purpose. Any help would be much
> appreciated. Thanks!! Mark KB3Z
>
> ------------------------------
> Sent using Verizon.net Mobile
> ______________________________________________________________
> 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
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> Post: mailto:[hidden email]
>
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> Please help support this email list: http://www.qsl.net/donate.html
>

Charles Tropp

Re: K3 Cw Filter Choices

In reply to this post by pastormg

Hi Mark!

I use the 400Hz 8 pole for general QSOs and the 250 for contesting. I am
very happy with my choice. Good Luck.

73, Charles, N2SO

On 12/15/2011 11:17 AM, [hidden email] wrote:

Barry

Re: K3 Cw Filter Choices

I use the 1 kHz filter most of the time and the 400 for as needed, for contesting.

In the 10m contest, I used the 1 kHz filter 90% of the time with the DSP set to 500-600 Hz.

Barry N1EU

Re: K3 Cw Filter Choices

In reply to this post by pastormg

pastormg2@verizon.net wrote

Would like to get back into CW and I was wondering which CW filter would be good for that purpose.

If you're not operating under tough condx, then you don't need a cw roofing filter - dsp alone will do a fine job.

If you're operating under truly tough condx, needing to work weak signals adjacent to VERY strong signals, you should go for the 200hz 5-pole filter. IMHO, if you really need a cw roofing filter, that's the one to get. I sold my wider cw filters and use the 200hz filters configured as 300hz.

Barry N1EU