[TenTec] OT: Openwire/Window Line and Bad Wx
Wade Staggs
tvman1954 at gmail.com
Mon Jul 29 12:50:56 EDT 2013
Good Point there Jon,
I normally run the 40 watts of drive
used with the setup of the SB-200. Then there are those ThunderBoomer
nights on 40 and 80 meters where it is nice to be heard. 40 to 400 Watts is
about all I ever need. When the Sun Spot Cycle allows, my favorite thing is
to run QRP on 10 Meters. There always seems to be too much noise on 75/80
to be effective with QRP. Talking to Germany on 5 Watts is quite a
thrill......
73
from Wade/KJ4WS
On Mon, Jul 29, 2013 at 11:34 AM, Jim Vohland <n9vo at hotmail.com> wrote:
> You raise some good points about power levels, but ya know, sometimes its
> just fun to try and work with a qrp rig. Lots of times, I get 5/9 reports
> until they find out I'm only running 5 watts. Oh, well if I really need it
> I can fire up the 100 watt rig and the AL82. Then they complain about
> having to use the attenuator!!!!
>
>
> > Date: Mon, 29 Jul 2013 11:17:59 -0500
> > From: tvman1954 at gmail.com
> > To: tentec at contesting.com
> > Subject: Re: [TenTec] OT: Openwire/Window Line and Bad Wx
> >
> > 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
> > > >>>>
> > > >>>>
> > > >>>> _______________________________________________
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> > > >>>> TenTec at contesting.com
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