http://www.elecraft.com/K3/Roofing_Filters.htm

Chuck KE9UW
[email protected]<mailto:[email protected]>

Sent from my iPad

On Mar 9, 2018, at 12:54 PM, Jim Low man 
<[email protected]<mailto:[email protected]>> wrote:


Maybe I missed it, but there once was a link on the Elecraft website with 
filter recommendations.

73 de Jim-AD6CW

On Mar 9, 2018, at 4:11 AM, Kjeld Holm 
<[email protected]<mailto:[email protected]>> wrote:

Agree
And just want to tell you that I am using Filter width=1500 and Filter=750.
Vy 73 de OZ1CCM

-----Original Message-----
From: [email protected]<mailto:[email protected]> 
[mailto:[email protected]] On Behalf Of Bill Johnson
Sent: 9. marts 2018 02:36
To: Elecraft List
Subject: Re: [Elecraft] 1.8 kHz SSB Filter

Yes!

73,
Bill
K9YEQ

-----Original Message-----
From: [email protected]<mailto:[email protected]> 
<[email protected]<mailto:[email protected]>> On 
Behalf Of Bob McGraw K4TAX
Sent: Thursday, March 8, 2018 7:22 PM
To: Elecraft List <[email protected]<mailto:[email protected]>>
Subject: Re: [Elecraft] 1.8 kHz SSB Filter

I definitely agree regarding having a 1.8 kHz filter for SSB is a positive 
attribute.   In fact both of my radios have 1.8 kHz filters. And by reducing 
the DSP BW to 1.8 kHz and shifting the PBT, one would be amazed at how well a 
SSB signal really sounds. Certainly worth the investment in my experience.

73

Bob, K4TAX


On 3/8/2018 4:38 PM, 
[email protected]<mailto:[email protected]> wrote:
Message: 1
Date: Thu, 8 Mar 2018 11:57:32 -0500
From: Craig Buck<[email protected]<mailto:[email protected]>>
To: Chuck Chandler<[email protected]<mailto:[email protected]>> 
Cc:[email protected]<mailto:[email protected]>
Subject: Re: [Elecraft] Planning the next filters
Message-ID:
  
<caaq9xabk9igcpbvmb8ognzxnmj0h1k2x87f1dx1fjsczk_p...@mail.gmail.com<mailto:caaq9xabk9igcpbvmb8ognzxnmj0h1k2x87f1dx1fjsczk_p...@mail.gmail.com>>
Content-Type: text/plain; charset="UTF-8"

Get the 1.8 if you work ssb.  Experiment with shifting the pass band
for maximum clarity.  Youll be amazed just how narrow it can get and
still be understandable.

On Mar 8, 2018 11:24 AM, "Chuck 
Chandler"<[email protected]<mailto:[email protected]>>  wrote:

Right now I have the stock SSB and a 400 Hz filter in both main and
sub rcvrs.  I would like to add some a few at a time.  My first
priority is to add a couple to the main receiver, since it is the
biggest chore to get to.

I plan on a 250 Hz CW filter, but am going back and forth between the
2.1 and 1.8 kHz filters.  I know that narrowing the DSP to 1.8 gives
a really difficult to understand voice signal, while the 2.1 allows
in more adjacent signals.  However, the roofing filters may not behave in the 
same manner.
For example, the 1.8 could be set to turn on at 2.1 to take advantage
of skirt shape.

I primarily DX, and operate in some contests as well.  I know SSB
contests really need a narrow SSB filter.

Any suggestions on the matter from those who have gone this route before?

73 de Chuck, WS1L

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