[1000mp] Auto Tuner Problem

[Roger Marrotte]

I've had a MP MK V for a few months.  Love the radio but I did have a tuner
problem right out of the box.  It wouldn't tune most of the time.  It would
try but unless I reset power it wouldn't go into transmit for the tune
process.  I had to send it to Yaesu.  They replaced a handful of parts and
it came back working fine.  I was given no explanation as to what was wrong.
I was upset and didn't like having to pay over $40.- shipping and insurance
to have a new out of the box radio fixed.  So I finally got to use the radio
a few weeks ago and I had a problem with my 80 meter dipole not tuning at
the high end of the band.  It was cut for the cw end.  I added a second
insulated wire to one side of the dipole parallel to the first wire and cut
for the high end of the band.  I just taped it to the first wire.  I wanted
to do both sides of the antenna but the back yard was flooded and the back
end is over a limb and will have to wait.  The result is that the tuner will
now tune the whole 80 meter band.  I'm not sure what kind of a pattern the
antenna has now but it works.

Roger

-----Original Message-----
From: 1000mp-bounces at mailman.qth.net [mailto:1000mp-bounces at mailman.qth.net]
On Behalf Of Dan Kovatch
Sent: Monday, April 18, 2005 10:02 AM
To: All about Yaesu 1000mp
Subject: Re: [1000mp] Auto Tuner Problem


Another 'trick' that sometimes works for me is to tune lower or higher in 
freq. first then move to the freq you want to operate on and retune (if 
necessary). For example, I have a Dipole cut for the low end of 40 and at 
7285 it is just out of range of the tuner. If I tune on 7200 and then retune

on 7285 it usually works out.

I think the problem with tuner is one of resistance and reactance. Even 
though the SWR is 3 to 1 it may be a combo of R and Rx that the tuner just 
can't handle because the resistance and/or reactance is out of range of the 
tuner.


FWIW
Dan W8CAR