[Elecraft] K3 6KHz Filter and Data Modes

[Joe Subich, W4TV]

There is a 4.2 KHz lowpass filter in the audio chain to the headphones
and speaker but it is not present on the "Line Out".  I regularly use
the FM (13 KHz) IF filter for WSJT-X and see 200 - 4200 Hz when the
DSP is adjusted correctly.


73,

    ... Joe, W4TV


On 9/1/2013 11:49 AM, Bob wrote:
> Hey,
>
> My widest filter is currently a 2.8 KHz on the main board.  If I understand
> things correctly, if I shift all the filters over a spot, then pop in a
> 6KHz AM filter for FL1, I can use that for TX and RX Data modes.
>
> The reason I ask is that the WSJT-X program is now supporting a full 4KHz
> wide waterfall that allows both JT65 and Jt9 QSOs.  With my current filter
> I can clearly see the upper end cuts off around 2900 Hz.
>
> So my question is would there be anything else in the audio or DSP chain
> that would prevent me from using the full 4KHz of WSJT-X while in DATA
> modes if I have a wider filter in slot FL1?
>
> Thanks in advance,
>
> 73, Bob, WB4SON
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