[Elecraft] Need to shift 8 pole 2.1 filter?

[iain macdonnell - N6ML]

Hi Don,

Yes, that's what I do (on the very rare occasions when I change from
my 1.8kHz configuration and need to return). Unfortunately, though,
most rig-control programs don't have the HI and LO-cut controls (in
fact there are no "CAT" command versions of them, AFAIK!), so if you
can't physically reach for the knob on the rig, you're stuck with
WIDTH and SHIFT (BW and IS).

I have a macro in DXLabs Commander that sets me up for SSB. Amongst
various other things it does "BW0180;" and "IS 1050;".

73,

    ~iain / N6ML


On Fri, Apr 15, 2011 at 12:50 AM, Don Wilhelm <w3fpr at embarqmail.com> wrote:
>  Iain,
>
> That is why it is easier to use the HI - cut knob to change filters in SSB
> mode rather than the XFIL button.
> The center frequency is automatically shifted along with the reduction in
> the high end.
>
> I have heard this "problem" many times, and there seems to be a lot of
> resistance to using the "fix" that was built into the K3 from the very
> start.
>
> 73,
> Don W3FPR
>
>
>
> On 4/14/2011 8:32 PM, iain macdonnell - N6ML wrote:
>>
>> You'll have the same problem if you NORMalise in SSB mode, then use
>> the XFIL button to select a narrower filter - it'll still be centered
>> on 1.50. It'd be nice if the NORMalise function for SSB mode could be
>> configurable, and if selecting other filters could, perhaps, adjust
>> the shift so that, effectively, the LO-cut stays the same. Personally,
>> I have a 1.8kHz filter, and use 1.8kHz all the time for SSB - I see no
>> need to let any more than that though to my ears... but I'm not an SSB
>> rag-chewer......
>>
>>     ~iain / N6ML
>>
>