[Elecraft] KX3 Filter Question

[Grant Youngman]

It acts much like the roofing filters in the K3.  Sherwood measured the difference in dynamic range at 2Khz spacing as being an improvement from 96 dB to 104 dB.  There’s some degradation noted at 1 KHz spacing limited by opposite sideband rejection, but the footnote isn’t clear whether this was after per band opposite sideband null optimization or not, and the extent to which that matters with or without the filter module in place.

Grant NQ5T

> On Jul 29, 2020, at 4:16 PM, Doug Millar via Elecraft <elecraft at mailman.qth.net> wrote:
> 
> Hi, I have a KX3 that I like very much. I put in the filter modification. Does anyone have any specifications on how much the filter helps the receiver- like before and after?   Thanks, Doug K6JEY