[Elecraft] KX3 PBT problem

[Don Wilhelm]

Al,

That sounds like the switch to Weaver demodulation below 1.8 kHz is 
causing the 'hole' in your waterfall - that is used for SSB voice reception.
Use DATA A (or AFSK A for RTTY) instead of SSB to avoid that condition.

73,
Don W3FPR

On 9/3/2015 10:55 AM, Al Duncan wrote:
> I have RX xFIL set to "normal" in the menu so that the PBT control adjusts
> bandwidth. When I use a BW of 1.8 KHz or higher in SSB mode, everything
> looks good on a waterfall display. But when I reduce the BW to 1.7 KHz or
> lower, a chunk approximately 250 Hz wide and centered at 1500 Hz is removed
> from the waterfall display. I originally thought it was related to the
> roofing filters as the effect happened at the same time that FL2 was
> selected, but after I set the roofing filters to "not installed" so that FL1
> was used for all bandwidths, the problems still occurs. Any suggestions
> would be appreciated.
>
> KX3-K serial #1691 with latest production release firmware installed. The
> roofing filter option was ordered with the transceiver.
>
> 73, AL - VE3RRD
>
>   
>
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>
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