[Elecraft] 1.8 kHz SSB Filter

[hawley, charles j jr]

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

Chuck KE9UW
c-hawley at illinois.edu<mailto:c-hawley at illinois.edu>

Sent from my iPad

On Mar 9, 2018, at 12:54 PM, Jim Low man <jmlowman at sbcglobal.net<mailto:jmlowman at sbcglobal.net>> 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 <kh at kh-translation.dk<mailto:kh at kh-translation.dk>> 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: elecraft-bounces at mailman.qth.net<mailto:elecraft-bounces at mailman.qth.net> [mailto:elecraft-bounces at mailman.qth.net] 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: elecraft-bounces at mailman.qth.net<mailto:elecraft-bounces at mailman.qth.net> <elecraft-bounces at mailman.qth.net<mailto:elecraft-bounces at mailman.qth.net>> On Behalf Of Bob McGraw K4TAX
Sent: Thursday, March 8, 2018 7:22 PM
To: Elecraft List <elecraft at mailman.qth.net<mailto:elecraft at mailman.qth.net>>
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, elecraft-request at mailman.qth.net<mailto:elecraft-request at mailman.qth.net> wrote:
Message: 1
Date: Thu, 8 Mar 2018 11:57:32 -0500
From: Craig Buck<radiok4ia at gmail.com<mailto:radiok4ia at gmail.com>>
To: Chuck Chandler<chandlerusm at gmail.com<mailto:chandlerusm at gmail.com>> Cc:elecraft at mailman.qth.net<mailto:elecraft at mailman.qth.net>
Subject: Re: [Elecraft] Planning the next filters
Message-ID:
  <CAAq9XABK9iGCPBVMb8OGnzXNmJ0H1k2X87f1dX1fJsCZK_PT9w at mail.gmail.com<mailto:CAAq9XABK9iGCPBVMb8OGnzXNmJ0H1k2X87f1dX1fJsCZK_PT9w at 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"<chandlerusm at gmail.com<mailto:chandlerusm at gmail.com>>  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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