http://elecraft.85.s1.nabble.com/K3-FM-filter-bandwidth-in-other-modes-tp3836856p3838357.html
I have just realised my mistake. I can find no reference to it in the
mentioned the 4.2kHz (AFAIR) bandwidth limit imposed by the DSP. So, it
>
> I have just fitted the FM filter to finish off my complement (now 13, 6,
> 2.7, 0.5 and 0.25). I used the K3 utility to set the bandwidth (13kHz) and
> I have all the square boxes ticked (checked) so that, in my understanding I
> should be able to go up to the full bandwidth of the filter in all my other
> modes should I wish.
>
> However, whether I use the width control or the xfil button, the FM filter
> (in FL1 of course) cannot be brought into play, the width simply stops at
> the width it did prior to fitting the FM filter.
>
> It's no big deal, I bought the FM filter to play on the top end of 10m from
> time-to-time, not to use enormous receive bandwidths in other modes, however
> I was of the belief that the full width should be usable in every mode so
> long as it is enabled on a per mode basis.
>
> I am wondering if there is something I have overlooked, and 'yes', I've read
> the manual! I am on the latest beta firmware.
>
> 73 Stephen
>
> G4SJP K3#980.
>
>
>
>
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