[Elecraft] K3 in WPX SSB with 2.7 roofer

[Ian White]

Hi Clive

I had the same good experience with the 1.8kHz Inrad filter in the old
FT-1000MP, so I moved that filter across to the K3 (with a change in
mounting board)... and have not regretted it.

Because the filter has such a restricted bandwidth, I configured the
filter to switch in at a WIDTH setting of 1.9kHz to avoid the bandwidth
being further narrowed by the DSP as well. The SHIFT setting is also
very critical for the best voice intelligibility. My particular filter
requires a fc setting of either 1.25 or 1.30kHz, and anything outside of
that range sounds very noticeably worse. 

Once the 1.8kHz filter has been carefully set up, and its settings
stored in the NORM II SSB memory for easy recall, the SHIFT and WIDTH
controls hardly ever need to be touched... which is exactly what the SSB
contester requires. 


73 from Ian GM3SEK


>-----Original Message-----
>From: elecraft-bounces at mailman.qth.net [mailto:elecraft-
>bounces at mailman.qth.net] On Behalf Of Clive Lorton
>Sent: 31 March 2014 10:58
>To: elecraft at mailman.qth.net
>Subject: Re: [Elecraft] K3 in WPX SSB with 2.7 roofer
>
>
>On 31 Mar 2014, at 06:47, Al Lorona <alorona at sbcglobal.net> wrote:
>
>> For years I have heard folks state that 1.8 kHz is mandatory for SSB
>contesting... but I have never understood how one could put up with
this
>narrow bandwidth for long. I need more information hitting my ears and
am
>perfectly happy with letting the famous 'ear-brain' filter extract the
>maximum from that information.
>
>Morning all, First post here from a new K3 owner.
>
>I have used a Inrad 1.8 kHz filter in my old Icom 756 and just loved
it.  I've
>just built K3 8098 and find the 1.8kHz filter much more uncomfortable
to
>listen to in normal use.  It is different beast.  But I expect it will
come into its
>own when digging that weak signal out of the QRM!
>
>At the moment I'm just enjoying learning to drive it....
>
>Clive G8POC
>
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