[Elecraft] K3 deaf when narrow filter engaged

[Guy Olinger K2AV]

The most likely cause of your problem is that the filter placements as
viewed in the K3 utility and as actually installed on the main board
do not actually match.  Next is that you have left an empty slot
ENABLED in the K3 utility.  After that, a filter not plugged all the
way in or defective.

73, Guy.

On Fri, Jul 8, 2011 at 8:06 PM, Andrew Moore <andrew.nv1b at gmail.com> wrote:
> New K3 with 3 filters:
>
> FL1 - empty
> FL2 - 2700 Hz
> FL3 - empty
> FL4 - 400 Hz
> FL5 - 200 Hz
>
> FL2,4,5 enabled, offsets and bandwidths entered, and filters plugged into
> right slots (FL1 can remain empty right?)
>
> When I turn the bandwidth encoder CCW, everything's fine until I hit 400 Hz.
>  At 450, I hear signal. At 400, when FL4 kicks in, receiver goes quiet from
> then on.
>
> Ideas?
>
> Also - RF calibration - I'm using an XG2 to feed the K3 a 50 uV signal.  The
> K3 hears it at about S5 max, not even close to S9.  Followed the calibration
> instructions.
>
> --Andrew, NV1B
> ..
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