Hi.
I think auto tuners make sense for fixed antennas. On a antenna that can
be variably tuned like the Screwdriver, I tend to agree with you. If you
did use an auto tuner, the way that you would need to do it is to switch
the antenna tuner out, tune the antenna and then if the SWR was still a
little high, switch the tuner gback in and tune it for a lower
SWR. Mostly, what I think you could have if you didn't do it right is
using the tuner to cancel out the reactance from mistuning the antenna and
most of your power output becomes heat energy instead of RF radiated energy!
73, de Lou K2LKK
At 04:38 PM 12/14/2007 -0700, you wrote:
>ah ok.
>If i were to use a screw driver antenna, i would just use a tw1 and use the
>swr tone feature to get the lowest swr and just use the up and down switch
>to raise or lower the antenna.
>either way works i guess.
>but i would definitely say don't use the internal antenna tuner, its
>redundant and will cause more headache then not.
>
>73
>Colin, V A6BKX
>----- Original Message -----
>From: "T Behler" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Friday, December 14, 2007 3:42 PM
>Subject: Re: ts480 question
>
>
> > Colin:
> >
> > The turbo-tuner helps me tune the screw-driver to resonance by stopping
>the
> > antenna on its upward or downward ttravel when resonance is reached.
> >
> > I could tune the antenna manually with the up-down switch that is
>provided,
> > but have no way of knowing where exactly I am. That's why the turbo-tuner
> > is helpful. It stops the antenna when a 1.5 to 1 or less SWR is reached.
> >
> > And, yes, I do occasionally use the screw-driver on 80 meters, and have a
> > 102-inch whip for that purpose.
> >
> > Not a perfect system to be sure, but it gets me out on 20, 40, and 80.
> > Still am having trouble tuning the antenna on 10 and 15 meters, but I
>think
> > that's because it's interacting with something on the RV frame.
> >
> > Will try more grounding to deal with that problem.
> >
> > 73 from Tom Behler: KB8TYJ
> >
> >
> >
> > ----- Original Message -----
> > From: "Colin McDonald" <[log in to unmask]>
> > To: <[log in to unmask]>
> > Sent: Friday, December 14, 2007 4:22 PM
> > Subject: Re: ts480 question
> >
> >
> > > You probably don't want to use two tuners.
> > > For various reasons, but your turbo tuner should tune the screw driver
>to
> > > a
> > > flat match.
> > > You lose power through the radios internal tuner, and through an
>external
> > > tuner, so adding the internal tuner will just limit your out going rf
>that
> > > much more.
> > > And since your mobile with a small antenna, the more rf you can get out
>to
> > > the antenna the better.
> > > I thought the screw driver was self tuning from 2M to 40M?
> > > if so then why the need for a tuner? are you wanting to work 80M as
>well?
> > > 73
> > > Colin, V A6BKX
> > > ----- Original Message -----
> > > From: "T Behler" <[log in to unmask]>
> > > To: <[log in to unmask]>
> > > Sent: Friday, December 14, 2007 11:26 AM
> > > Subject: ts480 question
> > >
> > >
> > >> Hi, all.
> > >>
> > >> Well, I am anxiously awaiting the arrival of my TS480, and just thought
> > >> of
> > > a
> > >> question I could use some help with.
> > >>
> > >> I'll do my best to verbalize this question in a way that hopefully will
> > > make
> > >> sense.
> > >>
> > >> As you may recall, I'm going to use the TS480 as my main HF rig in our
> > > motor
> > >> home. I have a Predator screw-driver-type antenna on the back of the
> > > motor
> > >> home, and I use something called a Turbo-tuner, made by N2VZ Enterprise
> > >> to
> > >> tune the screw-driver for resonance on my chosen operating frequency.
> > >>
> > >> The Turbo-tuner is interfaced with the Ts480 via two cables--one is an
> > > RS232
> > >> cable which goes to the front of the radio, and the other is a cable
>that
> > >> connects to the AT port on the back of the rig.
> > >>
> > >> I am wondering if connecting the turbo-tuner in this way will
> > > automatically
> > >> disable the auto-tuner in the TS480. Or, can the auto-tuner still be
> > >> used
> > >> to further "fine tune" the antenna once it has been tuned by the
> > >> turbo-tuner.
> > >>
> > >> Thanks, and 73 from Tom Behler: KB8TYJ
> > >>
> > >>
> > >>
> > >> --
> > >> No virus found in this incoming message.
> > >> Checked by AVG Free Edition.
> > >> Version: 7.5.503 / Virus Database: 269.17.2/1184 - Release Date:
> > > 12/14/2007 11:29 AM
> > >>
> > >>
> > >
> > >
> >
> >
> >
> > --
> > No virus found in this incoming message.
> > Checked by AVG Free Edition.
> > Version: 7.5.503 / Virus Database: 269.17.2/1184 - Release Date:
>12/14/2007 11:29 AM
> >
> >
>
>
>
>
>--
>No virus found in this incoming message.
>Checked by AVG Free Edition.
>Version: 7.5.503 / Virus Database: 269.17.2/1184 - Release Date:
>12/14/2007 11:29 AM
Louis Kim Kline
A.R.S. K2LKK
Home e-mail: [log in to unmask]
Work e-mail: [log in to unmask]
Work Telephone: (585) 697-5740
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