[Elecraft] KX3 PBT problem

[Al Duncan]

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