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Plastic Dipole centerpiece
I want to make a VHF receiving dipole with say 1/4" tubing. Can you buy
plastic dipole centerpeices? TIA. |
"Richard" wrote in message ... I want to make a VHF receiving dipole with say 1/4" tubing. Can you buy plastic dipole centerpeices? TIA. I mean a plastic center which has socket holes, which you push the tube into. |
Richard, I haven't seen anything like that sold commercially, but I don't see why you couldn't make one. Ought to be able to find a source of plastics on the internet or locally, maybe. Drill the holes you need and half way there. 'Doc |
Why do that? You can use a single piece of pipe 1/2 wavelength and simply
gamma match it. No need for all the insulation worries. "Richard" wrote in message ... "Richard" wrote in message ... I want to make a VHF receiving dipole with say 1/4" tubing. Can you buy plastic dipole centerpeices? TIA. I mean a plastic center which has socket holes, which you push the tube into. |
"'Doc" wrote in message ... Richard, I haven't seen anything like that sold commercially, but I don't see why you couldn't make one. Ought to be able to find a source of plastics on the internet or locally, maybe. Drill the holes you need and half way there. 'Doc What material do you think? |
Absolutely. Van Gornden, Budwig, and many others. Check the Ham Radio
on-line retail catalogs... 73, Mike KI6PR El Rancho R.F. CA "Richard" wrote I want to make a VHF receiving dipole with say 1/4" tubing. Can you buy plastic dipole centerpeices? TIA. |
Richard, I would think that would depend on what you can find available, PVC, plexiglas, 'Delrin', who knows what else. I've used a multi- layer thingy of plexiglas glued together before, seemed to work okay. So the question is 'what can you find?'. 'Doc |
On Fri, 23 Jan 2004 22:07:12 -0000, "Richard"
wrote: "Richard" wrote in message ... I want to make a VHF receiving dipole with say 1/4" tubing. Can you buy plastic dipole centerpeices? TIA. I mean a plastic center which has socket holes, which you push the tube into. For 2 meters I'd use 1/2 inch copper pipe for the dipole and then a plastic "T" would work for the center insulator. Just glue the pipe in place. Roger Halstead (K8RI & ARRL life member) (N833R, S# CD-2 Worlds oldest Debonair) www.rogerhalstead.com |
" Richard, I haven't seen anything like that sold commercially, but I don't see why you couldn't make one. Ought to be able to find a source of plastics on the internet or locally, maybe. Drill the holes you need and half way there. 'Doc What material do you think? As the center of a dipole is low impedance almost any insulator will work. If mounted outside pick something that will withstand the sun. |
Richard, I would think that would depend on what you can find available, PVC, plexiglas, 'Delrin', who knows what else. I've used a multi- layer thingy of plexiglas glued together before, seemed to work okay. So the question is 'what can you find?'. 'Doc I use the plastic from kitchen cutting boards for such parts. Strong and easily available. Torsten N4OGW |
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