Depends on how serious you are about cw.
I've found it makes a noticeable difference in a pileup or contest.
Can't speak to the digital modes, but I suspect it helps there too.
73 Randy K9OR
> Date: Thu, 26 Jan 2006 13:27:44 -0600
> From: "John Geiger (NE0P)" <ne0p@lcisp.com>
> Is anyone on the list using the 300hz CW filter in their FT100? Does it make
> a big difference over the 500hz filter? Is it worth the money and effort to
> install?
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