[Elecraft] [KX3] KX3 dual-watch working (ahead of schedule!)

[Wayne Burdick]

Moe,

The 1.5 kHz roofing filter will still be used for very small splits  
(typical of a DX station requesting "up 1" or "up 2" in CW mode  
pileups). Beyond that the roofing filters are turned off.

I'll post a detailed explanation of the filter bandwidths when I get a  
chance.

Wayne

On Mar 9, 2012, at 4:31 AM, AB8XA wrote:

> I read the KX3 filter option has 1,000 Hz and 3,000 Hz filters that  
> give a choice of 500 or 1,500 Hz filtering in CW and 3,000 Hz in  
> SSB. An explanation of how that happens would help.
>
> 3,000 Hz filtering is not available in CW and 1,500 Hz is not  
> available in SSB, right?
>
> It seems to me one has to buy the KX3 filter option just to have the  
> same strong adjacent signal rejection the "normal" 3,000 Hz (2.7 kHz  
> 5-pole/2.8 kHz 8-pole) SSB bandwidth the base model K3 offers.
>
> And if I understand the end result correctly, there is no strong  
> adjacent signal rejection with KX3 dual-watch on like there is with  
> the K3 with narrow filters on both the main and sub receivers. In  
> most cases, the bandwidth will be 15 kHz (CW split > 1,500 Hz).
>
> Is that correct?
>
> Thanks,
> --
> Moe - AB8XA
> Elecraft KX1 #2484, Fists #13020, SKCC #7460,
> FPQRP #2617,  NAQCC #5352, QRP-ARCI #14326
>
>
>
>
> On Mar 8, 2012, at 11:14 PM, Wayne Burdick wrote:
>
>> There's one nice thing about late hardware: the firmware gets better.
>>
>> Lyle and I just added Dual Watch to the KX3, which works amazingly
>> well. At present the VFOs can be separated by up to 15 kHz, but in
>> theory we can go to 30 kHz with the present DSP implementation.
>>
>> Now I'm looking for my first DX split QSO with dual watch. What's the
>> best DX spotting web site?
>>
>> Wayne,
>> N6KR
>>
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