The tuner in the 950, and probably the 450 also, is limited to a 3:1 SWR.
Sometimes I have seen mine exceed that range, but there are many
combinations of antenna and frequency which won't work.  The manual for the
FT950 states that it will not tune up a G5RV on some frequencies.

Lloyd Rasmussen, Kensington, Maryland
Home:  http://lras.home.sprynet.com
Work:  http://www.loc.gov/nls
 

> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of Lou Kolb
> Sent: Sunday, April 03, 2011 1:08 PM
> To: [log in to unmask]
> Subject: Re: Diognosing internal ATU problems
> 
> That's certainly a good test.  If it tunes successfuly on the dummy load
> on
> all bands, it may just mean that the yaesu tuner has less range than the
> Kenwood.  I was astonished at the difference in tuner performance between
> the TS-440 and the K3.  The K3 tuner handles things even the Dentron Super
> Tuner won't.  I think tuner range can vary greatly among built-in tuners.
> Good luck with it.  Lou WA3MIX
> ----- Original Message -----
> From: "Michael Ryan" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Sunday, April 03, 2011 11:27 AM
> Subject: Diognosing internal ATU problems
> 
> 
> > Hi All:=20
> >
> > Yesterday, I attempted  to install my new antenna but the weather was =
> > just too bad.=20
> > Wind and rain. However, we did manage to fix the windom for testing =
> > purposes. On the Yaesu FT-450, the windom successfully tuned on 80, 40,
> =
> > 20, 17 and 10. =20
> > Connected it to the TS-570, the antenna tuned successfully on the above
> =
> > mentioned bands including 30, 15, and 12. I'm beginning to suspect a =
> > problem with my Yaesu's tuner.=20
> > Keep in mind that when I 1ST installed the windom with the Yaesu, it =
> > tuned from 80 to 6.=20
> > I've now carted it back to my apartment for testing purposes.
> > If I hook a dummy load to the Yaesu and it tunes successfully from 160 =
> > to 6, would this indicate that there's nothing wrong with my internal =
> > tuner? =20
> > If the tuner does indeed have problems, shouldn't it behave the same on
> =
> > the dummy load?=20
> >
> > TNX & 73:=20
> >
> > Michael De VO1RYN=20