[TenTec] OT: Openwire/Window Line and Bad Wx

Mon Jul 29 12:17:59 EDT 2013

As my Old Elmer always said " Life is Too Short for QRP " When you care
enough to send a readable signal ! It should be QRO............ QRP has
it's place in the Outback and Power Limited situations. Sitting at the
house and hooked to 200 Amps or more of AC Service. Why worry about QRP? It
sort of reminds me of the New Technicians who buy a 5 watt Handi with the
Rubber Duck Antenna. And that is the last radio they purchase for the next
10 years. Because of this, I limit my time on 2 meters and 70 Cm. My radio
does QRP too! And with the twist of a control 100 Watts. Then the flip of a
switch .... more.... ! In my world it is better to have it and not need
it.... Than to need it and not have it! SB-200 for the Nets and an SB-220
that collects dust....

                                                73
from  Wade/KJ4WS

On Mon, Jul 29, 2013 at 10:56 AM, k6jek <k6jek at comcast.net> wrote:

> I'm surprised you're burning the tree at only 30' from the feed point. I
> wouldn't be surprised at a quarter wavelength out but 30' on 160 meters is
> maybe .05 wavelength out or something. Should be high current, relatively
> low voltage. I'm doing this in my head which is not a reliable way to do
> calculations.
>
> Ham lore around here is trees matter at high voltage points not current
> points. This may just be of those things we know that isn't true.
>
> Maybe you aren't exclusively QRP.
>
> Jon
>
>
> On Jul 29, 2013, at 8:20 AM, Bob McGraw - K4TAX wrote:
>
> > One end of my 160M antenna being #12 hard drawn copper, about 30 ft from
> the feed point runs through the top of a Maple tree.  The only thing I've
> noticed is the leaves and limbs burnt at the point the wire contacts the
> tree.  {Saves the cost of a tree triming service.}  Wind, snow, ice and
> rain have little to no effect on the operation.
> >
> > As Will Rodgers said "it's not what folks know that concerns me, it's
> what folks know that isn't correct, that gives concern".  This I find to be
> largely true with baluns and openwire line and balanced line.
> >
> > 73
> > Bob, K4TAX
> >
> >
> >
> >
> > ----- Original Message ----- From: "Phil Sussman" <psussman at pactor.com>
> > To: "Scott Harwood" <scotthsr at earthlink.net>; "Discussion of Ten-Tec
> Equipment" <tentec at contesting.com>
> > Sent: Monday, July 29, 2013 8:20 AM
> > Subject: Re: [TenTec] OT: Openwire/Window Line and Bad Wx
> >
> >
> >> I also use openwire feeder with 4" spacing. Rain, snow, ice, wind, hot,
> cool,
> >> the tuner usually doesn't have to be adjusted. (Unless it's unusually
> hot or
> >> cold)
> >>
> >> 73 de Phil - N8PS
> >>
> >> PS. I agree with Scott. I had a tree limb brushing the wire antenna and
> I
> >> didn't notice it -- until my XYL pointed it out. Seemed to have no
> effect,
> >> however.
> >>
> >> ---
> >>
> >> Quoting Scott Harwood <scotthsr at earthlink.net>:
> >>
> >>> That was a great article.  I'm a huge fan of open wire also.
> >>>
> >>> Last year I had a contractor doing some work in my side yard and he
> actually tied back my open wire line to an aluminum gutter using  plastic
> cable ties.  I did notice I had to re-tune one day, but the  guys I talk to
> on 75 meters said my signal had been as strong as  usual!  I didn't
> discover the tied down line until a week later  while checking out his work
> in the yard.  Go figure.
> >>>
> >>> Scott K4VWK
> >>>
> >>>
> >>> -----Original Message-----
> >>>> From: Rick - DJ0IP / NJ0IP <Rick at DJ0IP.de>
> >>>> Sent: Jul 29, 2013 4:54 AM
> >>>> To: 'Discussion of Ten-Tec Equipment' <tentec at contesting.com>
> >>>> Subject: [TenTec] OT:  Openwire/Window Line and Bad Wx
> >>>>
> >>>> I extracted this topic from the other thread on the Model 238.
> >>>>
> >>>> How does bad weather affect openwire compared to its effect on window
> line?
> >>>> Lots of opinions, lots of myths.
> >>>>
> >>>> Bob Allison (WB1CGM) and Joel Hallas (W1ZR) tested this to find out.
> >>>> Their results are reported in the November 2009 issue of QST on page
> 66.
> >>>> See: http://www.dj0ip.de/spiderbeam-1/spiderpole/pole-base-mount/and then
> >>>> select "W1ZR" as author and "2009" as year.
> >>>> Unfortunately you have to be a member of ARRL to download this and it
> is
> >>>> copyrighted, otherwise I would post the download on my web.
> >>>>
> >>>> Summary, for 95 ft. of feedline (the length they tested), the change
> is
> >>>> negligible in both.
> >>>> It is ever so slightly worse with window line, but less than 0.2dB.
> >>>> NEGLIGIBLE!
> >>>>
> >>>> The real difference is, true openwire changes it impedance only
> slightly
> >>>> when wet, whereas the window line changes more and generally requires
> >>>> re-tuning the matchbox.
> >>>>
> >>>> One word of caution, which should be obvious:  Neither are suitable
> for
> >>>> running along the ground, whether wet or dry!
> >>>>
> >>>> Being an operwire fanatic, I personally found this to be one of the
> most
> >>>> useful articles ever published in QST.
> >>>>
> >>>> 73
> >>>> Rick, DJ0IP
> >>>>
> >>>>
> >>>> _______________________________________________
> >>>> TenTec mailing list
> >>>> TenTec at contesting.com
> >>>> http://lists.contesting.com/mailman/listinfo/tentec
> >>>
> >>> _______________________________________________
> >>> TenTec mailing list
> >>> TenTec at contesting.com
> >>> http://lists.contesting.com/mailman/listinfo/tentec
> >>>
> >>
> >>
> >> _______________________________________________
> >> TenTec mailing list
> >> TenTec at contesting.com
> >> http://lists.contesting.com/mailman/listinfo/tentec
> >
> >
> > _______________________________________________
> > TenTec mailing list
> > TenTec at contesting.com
> > http://lists.contesting.com/mailman/listinfo/tentec
>
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>