I have a Chinese version of a Budipole type vertical that uses exactly that... ribbon cable cut to various resonate lengths for the elevated radials. Four as I remember. Works very well and quick to deploy and stow.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: www.VillaGrandPiton.com email: b...@wjschmidt.com > On Mar 10, 2017, at 9:24 PM, stan levandowski <sjl...@optonline.net> wrote: > > Hi Don and thanks for the suggestions. Yes, I already have a 67 foot doublet > fed with window line as well as simple wires and counterpoises in line with > page 10 of the KXAT1 manual. They work just fine. No argument there. > > > But I stumbled upon this "linear loaded" vertical antenna and thought I might > try it. It's is a 20 foot piece of 300 ohm TV line with the conductors > twisted and soldered together at the top and taped to a twenty foot crappie > pole. At the bottom, for working 20 and 30 meters, both of the conductors > are connected to the red BNC terminal on the KX1 making the the radiator just > a "fat" 20 foot wire. For working 40 meters the bottom conductors are > separated and one goes to the red BNC terminal and the other just hangs loose > making it a 40 foot antenna. The write-up I found states, "On 40m the folded > wire creates a linear loading effect due to the capacitive coupling between > the two wires (note that currents are not equal and opposite so there is no > cancellation of signal as you might initially think). This added capacitance > allows the wire to be resonated on 40m by the internal tuner in the K1, KX1 > or also by the Elecraft T1." The fellow who offered this antenna idea said > that he had been using it successfully for quite awhile. > > > Adding the BL2 is my idea because it will be part of the solution for making > the bottom connections. My intent is to come up with a "decent" portable > antenna that I can erect anywhere in just one minute. I want to come up with > some creative way to make all the pieces work together effortlessly, rapidly > and reliably, including dealing with the crappie pole. My dream is to drop > the crappie pole into a homemade holder on my camp chair, push up the pole > with the antenna following, walk the roll of ribbon cable out in a straight > line, go back to the chair, sit down, turn on the KX1 and start operating! > It's my springtime project.... > > > I ordered a 100 foot role of ribbon cable so I can do a little experimenting > with opening up the ends. > > >> On Fri, Mar 10, 2017 at 09:44 PM, Don Wilhelm wrote: >> >> Stan, >> >> It can be made to work, but will be a real "bear" to adjust to resonance >> unless you separate the ends. >> >> If you are feeding with 300 ohm twinlead, why Hi Don and thanks for the >> suggestions. Yes, I already have a 67 foot > doublet fed with window line as well as simple wires and counterpoises in > line with page 10 of the KXAT1 manual. They work just fine. No argument > there. > > > But I stumbled upon this "linear loaded" vertical antenna and thought I might > try it. It's is a 20 foot piece of 300 ohm TV line with the conductors > twisted and soldered together at the top and taped to a twenty foot crappie > pole. At the bottom, for working 20 and 30 meters, both of the conductors > are connected to the red BNC terminal on the KX1 making the the radiator just > a "fat" 20 foot wire. For working 40 meters the bottom conductors are > separated and one goes to the red BNC terminal and the other just hangs loose > making it a 40 foot antenna. The write-up I found states, "On 40m the folded > wire creates a linear loading effect due to the capacitive coupling between > the two wires (note that currents are not equal and opposite so there is no > cancellation of signal as you might initially think). This added capacitance > allows the wire to be resonated on 40m by the internal tuner in the K1, KX1 > or also by the Elecraft T1." The fellow who offered this antenna idea said > that he had been using it successfully for quite awhile. > > > Adding the BL2 is my idea because it will be part of the solution for making > the bottom connections. My intent is to come up with a "decent" portable > antenna that I can erect anywhere in just one minute. I want to come up with > some creative way to make all the pieces work together effortlessly, rapidly > and reliably, including dealing with the crappie pole. My dream is to drop > the crappie pole into a homemade holder on my camp chair, push up the pole > with the antenna following, walk the roll of ribbon cable out in a straight > line, go back to the chair, sit down, turn on the KX1 and start operating! > It's my springtime project.... > > > I ordered a 100 foot role of ribbon cable so I can do a little experimenting > with opening up the ends. > > >> On Fri, Mar 10, 2017 at 09:44 PM, Don Wilhelm wrote: >> >> Stan, >> >> It can be made to work, but will be a real "bear" to adjust to resonance >> unless you separate the ends. >> >> If you are feeding with 300 ohm twinlead, why not make a 66 foot long center >> fed dipole out of it. >> >> Alternately if this is for portable work, us no feedline at all - just a BNC >> to binding post adapter at the KX1. Use 2 lengths of wire as is shown on >> page 10 of the KXAT1 manual. >> >> 73, >> Don W3FPR >> >>> On 3/10/2017 7:14 PM, stan levandowski wrote: >>> I found the plans (June 2010 Elecraft Reflector) to build a 40/30/20 >>> meter "linear loaded" portable antenna for my KX1 (using a crappie rod, >>> 300 ohm twinlead for the radiator, a BL2 balun, and ribbon cable radials >>> cut to 1/4 wavelength for each of the bands (16, 25 and 33 feet). >>> >>> My question is how terrible would it be to use a piece of that thin >>> computer ribbon cable cut to the three lengths but NOT separated? This >>> would make it easier to deploy and roll back up. >>> >>> Has anyone ever tried using unseparated ribbon cable counterpoises? The >>> materials are on order and I'm sort of anxious to know. >> > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to b...@wjschmidt.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
