[Yaesu] FT900 filter help

[Kelly Jones]

Thanks for all of the replies so far.  However, I think I'm still 
stumped.  It would appear the filter should be doing much more than it 
is.  I had a Kenwood 850 from the same era and I remember just having a 
single 500hz filter in it making a world of difference - something I'm not 
seeing in this one.

Is there a switch that needs flipped, a menu setting or something to tell 
the radio the CW filter is installed?  The manual doesn't mention anything, 
but in all of my other radios I had to "tell" it that the filter was installed.

This one has me stumped.  Perhaps the filter is bad, who knows.  I guess 
the only way to test that theory is to try a different one.  Anybody have a 
spare XF110N (I think that's it) laying around they would like to part with?

73
Kelly - N0VD


At 03:28 PM 8/25/2005, you wrote:
>Kelly,
>
>Something does not seem to be right. I have an FT-900CAT with Yaesu's 500 Hz
>CW filter installed and I do not hear anything like what you are
>describing.. The performance was similar to other narrow CW filters in other
>radios that I have. (I still have the radio but it is in storage as a
>spare/traveling rig. I haven't fired it up in a couple of years).
>
>Hope you find the problem.
>
>Chuck, KE4OAR
>
>----- Original Message -----
>From: "Kelly Jones" <kjones at sullivan1.com>
>To: <Yaesu at mailman.qth.net>
>Sent: Wednesday, August 24, 2005 11:10 PM
>Subject: [Yaesu] FT900 filter help
>
>
> > Hi Guys (and gals),
> >
> > I recently put an InRad 703 400hz filter in my FT-900 and so far I'm very
> > disappointed with the way it performs.  With the CW Narrow engaged, I now
> > get all kinds of "images" when tuning the band.  If I punch the CW button
> > to take it out of "narrow" most of the images go away, however, there are
> > still a few that seem to occur with very strong signals.
> >
> > As for actually tightening up the receive, I can't say it did anything at
> > all.  I can still hear signals well outside of the 500hz range.  In fact,
>I
> > can still hear signals nearly 2khz away in "narrow".  Is this normal for
> > this radio/filter combination?
> >
> > While I shouldn't compare the performance to my Mark V, I would certainly
> > expect more than what I'm seeing.  Something doesn't appear to be right,
> > but I can't tell what it is.  As a side note, the 703 used to be a 703C.
>I
> > removed the circuit board in order to mount the filter in the FT-900.
>From
> > what I have been told (including InRad), the only difference is that the C
> > model has the circuit board attached for the MP line.
> >
> > Any suggestions or ideas would be appreciated.  I'm getting ready for a
> > couple of contest expeditions and was hoping this radio would play.
> >
> > 73
> > Kelly - N0VD
> >
> >
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