[1000mp] Auto Tuner Problem

[Dan Kovatch]

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
----- Original Message ----- 
From: "Mark Marsden" <MM at plextek.co.uk>
To: <jim.bryant at btinternet.com>; <1000mp at mailman.qth.net>
Sent: Monday, April 18, 2005 5:36 AM
Subject: Re: [1000mp] Auto Tuner Problem


Hi Jim

One thing I've noticed with the MP ATU with a high'ish SWR is that it can 
sometimes give up tuning almost immediately. To get it to try harder try 
this.

Turn down the RF power, go to FM & hold the Tx on with MOX, then press the 
Tune button. The ATU process then starts trying to tune. As it works away, 
slowly wind up the power.

The ATU often finds matches with lower power this way that it can't on 
higher power.

Best 73 Mark G4AXX



>>> jim.bryant at btinternet.com 17/04/05 09:45:21 >>>
I am using a 1000MP (Not MkV) and due to a lack of real estate, use a half
size G5RV antenna. The antenna will tune up on all bands from 7MHz up using
the 1000MP Auto-Tuner.

Yesterday I made some alterations to my antenna and went to check that the
FT-1000MP would still tune up OK.
First of all, I cleared the Auto-Tuner memories and went through each band
attempting to tune 2 spot freqs in each band using the TUNE button.

The auto tuner had no problems on 7MHz band but on all other bands the tuner
showed HIGH SWR and shut down. The strange thing is, if I just select TUNER
but do not press the TUNE button, then hold the key down, the tuner does its
stuff and I get a very low SWR indication after about 3 seconds on all
bands. If I now press the TUNE button to memorize the setting, it gives me
the HIGH SWR again and shuts down.

I do not remember having this problem before and wonder if anyone could
assist me with this problem.

Regards

Jim Bryant M0JWB

Portishead, UK

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