[Elecraft] Re: KX1 IF filter tuning?

[Wayne Burdick]

Jeff Stai WK6I wrote:
> 
> OK, here goes... has anyone put their KX1 on to Spectrogram to look at the filter shape? I have...

Hi Jeff,

The KX1's filter passband is a compromise to allow varactor tuning over a wide
range. Since some ripple is unavoidable in this case, adjustment of the FILTER
control may occasionaly be desireable to optimize for a particular signal pitch.
Of course the effect is lessened by the KX1's AGC when signals and noise are at
high levels.

If you weren't interested in wider bandwidths at all, you could select a
different termination impedance, although I haven't experimented with this. I
wouldn't recommend doing this without fully re-testing the passband at all
settings of the FILTER control.

73,
Wayne
N6KR