K3 CW filters advice

[RobertG]

Well, I've decided to get the K3. I've been reading all posts concerning
filters [and everything about filters]. I'm a 98% CW operator, mostly
chasing DX and contesting [little pistol]. I'm looking for
recommendations for (1) a "brick wall" narrow CW filter for contesting
and weak signal work, and (2) something wider for casual looking around
and rag chewing. What should I buy? Thanks for any and all comments.

...robert
--
Robert G. Strickland, PhD, ABPH - KE2WY
[hidden email]
Syracuse, New York, USA
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[Arie Kleingeld PA3A-2]

Robert,

Since you are an experienced CW operator you already know what
bandwidth(s) you like.

For the K3 you need the roofing filters for those bandwidths, just like
a transceiver without DSP.
If your Roofing filter is too wide, you'll be in trouble if signals
nearby are stronger than about S9+20. If those strong sigs pass through
your roofing filter, the DSP will not take them out completely and your
agc will be pumped up, often sounds like keyclicks. As soon as the
roofing filter keeps the strong signals out, the K3 is super!

My filters: 400Hz 8-pole and 200Hz 5-pole. Did the CQ160cw  with this
config last weekend at clubstation PI4D.  We had a very good time!

73
Arie PA3A

Op 3-2-2012 21:14, Robert G. Strickland schreef:
> Well, I've decided to get the K3. I've been reading all posts concerning
> filters [and everything about filters]. I'm a 98% CW operator, mostly
> chasing DX and contesting [little pistol]. I'm looking for
> recommendations for (1) a "brick wall" narrow CW filter for contesting
> and weak signal work, and (2) something wider for casual looking around
> and rag chewing. What should I buy? Thanks for any and all comments.
>
> ...robert
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[Joe Subich, W4TV-4]

You don't say whether you have a subreceiver (and the potential need
to match filter offsets) but I'd recommend the Inrad 500 Hz filter
(a bit wider than the 400) for general use and the Elecraft 200 Hz
filter when you want the maximum selectivity.

If you weren't 98% CW and there was a concern for RTTY, I'd have
suggested the INRAD 400 Hz filters as having a bit better performance
for RTTY at the cost of being marginally tight for general CW.

I found that having both the Elecraft 400 Hz (430-450 Hz nominal) and
250 Hz (350-370 Hz nominal) a complete waste of the second filter as
there is not enough difference to notice.  Even though the shape factor
of Elecraft 200 Hz 5-pole filter is not as good as Inrad's  250 Hz 8
pole filter, the 5-pole filter is still narrower than the 250 Hz filter
at all points on the skirts.

If you don't have the subreceiver and don't plan on getting one, the
pair pf Elecraft 500/200 Hz 5-pole filters offers excellent performance
at a cost effective price compared to the more expensive 8 pole
filters.

73,

    ... Joe, W4TV


On 2/3/2012 3:14 PM, Robert G. Strickland wrote:
> Well, I've decided to get the K3. I've been reading all posts concerning
> filters [and everything about filters]. I'm a 98% CW operator, mostly
> chasing DX and contesting [little pistol]. I'm looking for
> recommendations for (1) a "brick wall" narrow CW filter for contesting
> and weak signal work, and (2) something wider for casual looking around
> and rag chewing. What should I buy? Thanks for any and all comments.
>
> ...robert
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[Gary D Krause]

Hi Robert,

I just bought the K3 in December and I also work mostly CW.  I also work
mostly QRP anymore so, I have the 400 and 200Hz roofing filters.  They work
super for me!

Gary, N7HTS


On Fri, 03 Feb 2012 20:14:31 +0000
  "Robert G. Strickland" <[hidden email]> wrote:

> Well, I've decided to get the K3. I've been reading all posts concerning
> filters [and everything about filters]. I'm a 98% CW operator, mostly
> chasing DX and contesting [little pistol]. I'm looking for
> recommendations for (1) a "brick wall" narrow CW filter for contesting
> and weak signal work, and (2) something wider for casual looking around
> and rag chewing. What should I buy? Thanks for any and all comments.
>
> ...robert
> --
> Robert G. Strickland, PhD, ABPH - KE2WY
> [hidden email]
> Syracuse, New York, USA
> ______________________________________________________________
> 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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> Please help support this email list: http://www.qsl.net/donate.html

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[Cookie]

Robert, you don't say what you are replacing which would be helpful to compare.  I came from a TS-850SAT and elected the standard filter, a 500 Hz 5 pole and a 200 Hz.  I am not sure that I have ever needed the 200 Hz filter, but once it is installed you can't use a very narrow DSP filter without the 200 Hz roofer kicking in, so you can't tell what a 100 Hz DSP filter would do without it.  When I want wider than 500 Hz (rarely), I am happy with the DSP filter.  I am also primarily a CW operator, but probably less than 98%.  Also, if you change your mind, it is easy to add filters.
 
Willis 'Cookie' Cooke
K5EWJ & Trustee N5BPS, USS Cavalla, USS Stewart


________________________________
 From: Robert G. Strickland <[hidden email]>
To: [hidden email]
Sent: Friday, February 3, 2012 2:14 PM
Subject: [Elecraft] K3 CW filters advice
 
Well, I've decided to get the K3. I've been reading all posts concerning
filters [and everything about filters]. I'm a 98% CW operator, mostly
chasing DX and contesting [little pistol]. I'm looking for
recommendations for (1) a "brick wall" narrow CW filter for contesting
and weak signal work, and (2) something wider for casual looking around
and rag chewing. What should I buy? Thanks for any and all comments.

...robert
--
Robert G. Strickland, PhD, ABPH - KE2WY
[hidden email]
Syracuse, New York, USA
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[KE8G]

Hi Robert,
I work 100% CW, and in my K3 have a 1KHz, 400Hz, & 250Hz.  Now, I know it's
a lot of redundancy, but I figured for the couple of extra bucks, what the
heck!

You just might want to go with the 400Hz & 250Hz.  Most on this reflector
will say that being as close in bandwidth as they are, to forget the 250Hz
and go with the 200Hz.  Personally, I chose the 250Hz because it is a 8-pole
filter and the 200Hz is a 5-pole.

Good luck in your purchase, you will not be sorry choosing a K3!

73 de Jim - KE8G

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Gary D Krause
Sent: Friday, February 03, 2012 4:57 PM
To: Robert G. Strickland; Elecraft
Subject: Re: [Elecraft] K3 CW filters advice

Hi Robert,

I just bought the K3 in December and I also work mostly CW.  I also work
mostly QRP anymore so, I have the 400 and 200Hz roofing filters.  They work
super for me!

Gary, N7HTS


On Fri, 03 Feb 2012 20:14:31 +0000
  "Robert G. Strickland" <[hidden email]> wrote:
> Well, I've decided to get the K3. I've been reading all posts
> concerning filters [and everything about filters]. I'm a 98% CW
> operator, mostly chasing DX and contesting [little pistol]. I'm
> looking for recommendations for (1) a "brick wall" narrow CW filter
> for contesting and weak signal work, and (2) something wider for
> casual looking around and rag chewing. What should I buy? Thanks for any
and all comments.

>
> ...robert
> --
> Robert G. Strickland, PhD, ABPH - KE2WY [hidden email] Syracuse,
> New York, USA
> ______________________________________________________________
> 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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