Curt,
You may want to revisit your 'been there done that' thing. If you open wire
feeder radiated, that was because you had an imbalance in your antenna some
how. Two wires carrying V/I 180 degrees out of phase, does not radiate.
Just make both sides of your antenna wire the same physical length and keep
both sides away from anything that would unbalance the current in the
antenna, and your open wire feed line will not radiate.
Proof was when living in northern Virgania, I ran some 300' of open wire
feeder to a sloping 80m dipole and fed it with 1.5 KW during contest and
chasing DX. Neighbors within 50' of each side of me had no TVI/RFI and my
own home TV antenna used only rabbit ears, all with no problem for some 15
years. A little patience in putting up your antenna and you won't have a
problem.
73,
Tommy - W4BQF
----- Original Message -----
From: "Curt" <k3ey@yahoo.com>
To: <wb2vuf@qsl.net>; "Discussion of Ten-Tec Equipment"
<tentec@contesting.com>
Sent: Friday, July 08, 2005 12:42 PM
Subject: Re: [TenTec] Yaesu FT9000 oversights in QST review
>
> I agree! Ladder line works great, been there done that. It also radiates
like crazy and if you are in close proximity to miserable neighbors, ladder
line is not desirable fed line. If you live where even putting up a vertical
is out and the only hope is that dreaded folded dipole, then I guess the
folded dipole it is. To support that folded dipole I had to tie both ends
off on two different neighbors property getting permission with the promise
of absolutely no TVI. That dreaded folded dipole made working HF possible.
All the nay saying who laugh to themselves watching what they perceive as
fools work the world with their folded dipoles dummy loads I say: Give it a
break guys. All you're doing is making yourselves look like old dried up men
who despise anything that doesn't fit your perfect self perceived world
view. Distain has become your mantra.
>
>
> Bwana Bob <wb2vuf@qsl.net> wrote:Its a mystery to me why hams would go for
a broadband antenna of any
> kind, when a dipole fed with ladder line and used with a decent tuner
> (auto or manual) is cheaper and more efficient. Yet, I constantly see
> hams putting up T2FD resistive-loaded folded dipoles on emergency
> operations centers. There is no deception here: the specs of these
> antennas are published but not many hams read them and realize that such
> antennas are only about 12% efficient on 80 meters. Now the military
> with frequency-hopping radios needs a broadband antenna because tuners
> can't hop very fast and they add bulk to the portable kit. We change
> bands, but its hardly a freq-hopping mode of operation.
>
> Years ago, I found myself in a city "somewhere in the Middle East".
> There were many embassies within walking distance. I amused myself by
> looking at the the HF antennas on the embassy rooftops. There were a
> couple that used big log periodics, but the majority used simple dipoles
> fed with 600 ohm ladder line- a design that goes back to the 30's and
> 40's. Why argue with success?
>
>
> 73,
>
> Bob WB2VUF
>
> Grant Youngman wrote:
>
> >
> >
> >>Maxcom later claimed that
> >>the unit used in the QST rewiew was a display model that had
> >>been "stolen".
> >
> >
> > These guys are still very much in business, selling very expensive dummy
> > loads -- uh -- ah -- sorry, "automatic" Antenna Tuners.
> >
> > The name has been changed to protect the innocent (or guilty, depending
on
> > how you look at it).
> > http://www.maxx-com.com/
> >
> > Enjoy ..
> >
> > Grant/NQ5T
> >
> >
> > _______________________________________________
> > TenTec mailing list
> > TenTec@contesting.com
> > http://lists.contesting.com/mailman/listinfo/tentec
> >
>
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