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#1
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Mark, You may have a point about the dipole being better, especially for portable operation. I just want to experiment with the aluminum poles I have. I may take your advice and use them to create a portable tower in the long-run. But first I think I will try out the vertical. You could probably rig it up to do either, if the vertical is stout enough to support a dipole/s. I have a couple of drive on masts that I use with the fence rail masting. Two of those makes 20 ft, and a good support for dipoles, or other antennas. For industrial use, I have a tower and beam I can drag around...I've drug it to the last four field days...Wonder if I'm gonna make it five..?? It's a lot of work for a two day deal....:/ I'm almost tempted to take a field day vacation for a year...Have to see...MK |
#3
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Dear "Asimov" w/o a call sign:
If you look closely, you will see that the "coiled up ribbon" is a transmission line or a pair of transmission lines. By elevating the antenna, which must be connected to the truck through at least one transmission line, much improved transmission range is effected. 73 Mac N8TT -- J. Mc Laughlin; Michigan U.S.A. Home: "Asimov" wrote in message ... " bravely wrote to "All" (24 Mar 05 09:41:39) --- on the heady topic of " Loading Coil Q" snip Lately I've seen TV media trucks with a type of rather wide pole of what seems to consist of a large coiled up ribbon. When they get to a location they unfurl the tube and it raises the microwave antenna. They seem to be made out of plastic or carbon, not sure. The one I saw went up about 30 feet. It seems very lightweight in any case. Anyone here know what it is? A*s*i*m*o*v |
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