Do you think splicing 100' of wire onto a GTO exit wand would work?
in [Repair]
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From: Elmo on 1 Feb 2010 10:15 I bought too short of a driveway-gate exit wand (GTO FM139 = 50 feet); I need 150 feet. Nobody told me (so I'm saying it here), one really needs about 150 feet if they want the driveway gate to be open by the time the moving mass of metal (i.e., automobile) reaches the gate. Lesson learned. Researching the web, it appears GTO sells three wands: http://www.gtopro.com/access_controls.htm - FM139 = 50 feet wired (about $180) - FM140 = 100 feet wired (about $200) - FM141 = 150 feet wired (about $225) The instructions say you can not splice additional lengths (http://www.gtopro.com/PDF/Flyers/Gate-Opener-Access-Control-FM139-vehicle-sensor.pdf ) Calling www.gtopro.com technical support at 800-543-4283, they say there is no difference between the wands or the wire other than the length BUT if I splice in a wire, it won't work. The technical support guy was very helpful. He said the reason it won't work is that the "sensitivity of the magnetic field" changes with the splice. I don't understand why (if I make a good splice) but maybe there is something about magnetic fields I don't understand that you can elucidate for me? The wire is 5 conductor 16awg multi-strand shielded. What is it about a splice that destroys the magnetic field?
From: Bill on 1 Feb 2010 11:09 One thing is shielding of the splice... http://en.wikipedia.org/wiki/Faraday_cage Then other than that, the wire length might have a certain *total* resistance or *total* capacitance and this is adjusted for at the wand or at the adjustment for the wand. This principal might be along the lines of adjusting a CB antenna like it says here (length of the antenna matters)... http://www.wearecb.com/support/setcbantenna.htm "Elmo" wrote in message >I bought too short of a driveway-gate exit wand (GTO FM139 = 50 feet); I > need 150 feet. > > Nobody told me (so I'm saying it here), one really needs about 150 feet if > they want the driveway gate to be open by the time the moving mass of > metal > (i.e., automobile) reaches the gate. Lesson learned. > > Researching the web, it appears GTO sells three wands: > http://www.gtopro.com/access_controls.htm > - FM139 = 50 feet wired (about $180) > - FM140 = 100 feet wired (about $200) > - FM141 = 150 feet wired (about $225) > > The instructions say you can not splice additional lengths > (http://www.gtopro.com/PDF/Flyers/Gate-Opener-Access-Control-FM139-vehicle-sensor.pdf > ) > > Calling www.gtopro.com technical support at 800-543-4283, they say there > is > no difference between the wands or the wire other than the length BUT if I > splice in a wire, it won't work. > > The technical support guy was very helpful. He said the reason it won't > work is that the "sensitivity of the magnetic field" changes with the > splice. > > I don't understand why (if I make a good splice) but maybe there is > something about magnetic fields I don't understand that you can elucidate > for me? The wire is 5 conductor 16awg multi-strand shielded. > > What is it about a splice that destroys the magnetic field?
From: William Sommerwerck on 1 Feb 2010 11:22 > The technical support guy was very helpful. He said the > reason it won't work is that the "sensitivity of the magnetic > field" changes with the splice. On the face of it, this is a pile of manure. It's possible (as someone else said) that the system might be calibrated for specific cable lengths, and it might be difficult to splice the wire in such a way as to maintain the desired electrical characteristics. But an amateur antenna system has at least two "splices" in it -- one at the transmitter, the other at the antenna -- and it works fine. If the folks running the company are "nice" people, they should take back the too-short cable -- even though it's been used -- and give you full credit towards a cable of the right length.
From: GregS on 1 Feb 2010 12:53 In article <ce74f791840c3849697fd11b070dd0af(a)tioat.net>, Elmo <dcdraftworks(a)Use-Author-Supplied-Address.invalid> wrote: >I bought too short of a driveway-gate exit wand (GTO FM139 = 50 feet); I >need 150 feet. > >Nobody told me (so I'm saying it here), one really needs about 150 feet if >they want the driveway gate to be open by the time the moving mass of metal >(i.e., automobile) reaches the gate. Lesson learned. > >Researching the web, it appears GTO sells three wands: >http://www.gtopro.com/access_controls.htm >- FM139 = 50 feet wired (about $180) >- FM140 = 100 feet wired (about $200) >- FM141 = 150 feet wired (about $225) > >The instructions say you can not splice additional lengths >(http://www.gtopro.com/PDF/Flyers/Gate-Opener-Access-Control-FM139-vehicle-sens >or.pdf >) > >Calling www.gtopro.com technical support at 800-543-4283, they say there is >no difference between the wands or the wire other than the length BUT if I >splice in a wire, it won't work. > >The technical support guy was very helpful. He said the reason it won't >work is that the "sensitivity of the magnetic field" changes with the >splice. > >I don't understand why (if I make a good splice) but maybe there is >something about magnetic fields I don't understand that you can elucidate >for me? The wire is 5 conductor 16awg multi-strand shielded. > >What is it about a splice that destroys the magnetic field? First thing, how do you get IN ???? Second thing, try an additional 5-10 feet and see if there is something other than ?? Whats the connector look like ?? greg
From: DerbyDad03 on 1 Feb 2010 12:57
On Feb 1, 10:15 am, Elmo <dcdraftwo...(a)Use-Author-Supplied- Address.invalid> wrote: > I bought too short of a driveway-gate exit wand (GTO FM139 = 50 feet); I > need 150 feet. > > Nobody told me (so I'm saying it here), one really needs about 150 feet if > they want the driveway gate to be open by the time the moving mass of metal > (i.e., automobile) reaches the gate. Lesson learned. > > Researching the web, it appears GTO sells three wands:http://www.gtopro.com/access_controls.htm > - FM139 = 50 feet wired (about $180) > - FM140 = 100 feet wired (about $200) > - FM141 = 150 feet wired (about $225) > > The instructions say you can not splice additional lengths > (http://www.gtopro.com/PDF/Flyers/Gate-Opener-Access-Control-FM139-veh... > ) > > Callingwww.gtopro.comtechnical support at 800-543-4283, they say there is > no difference between the wands or the wire other than the length BUT if I > splice in a wire, it won't work. > > The technical support guy was very helpful. He said the reason it won't > work is that the "sensitivity of the magnetic field" changes with the > splice. > > I don't understand why (if I make a good splice) but maybe there is > something about magnetic fields I don't understand that you can elucidate > for me? The wire is 5 conductor 16awg multi-strand shielded. > > What is it about a splice that destroys the magnetic field? Add the required number/severity of speed bumps to force the drivers to slow down to whatever speed works for the 50 foot wand. |