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"V" Dipole Antenna
John while what you describe is correct, it is not the type of messanger rope, line, or cable that is being thought of. In the antenna case, it is a strong rope that is streached between two supports. To this rope is attached a lighter antenna. Say you only have some number 20 wire and want to make an 80 meter dipole. If you string the # 20 wire and attach some rg-8 type coax to the middle of it, it would probalby not stay up very long. Also you would have to have a large drop in the middle as you can not streachit very tight without breaking. If you have a strong rope you can tape and use some ultraviolet resistant wire ties to attach the antenna wire to the rope and then pull it up tighter. I have a tower up 60 feet with several beams on it. While it may not be the recommended practice, I came off the tower around the 40 foot level and ran the coax (4 coax +rotor cable) to the house about 50 feet away. I used a piece of guy wire and taped and ty wrapped the cable to the the guy wire. I pulled this guy wire tight enough to keep the cable off the ground. This particular guy wire is not one of the supporting guys, but just a 'messanger wire' to hold up the coax with out strssing the coax. OK, I got it! I usually use Nylon line (home improvement store, about 150 pound test) for that purpose. You can sure do a lot of experimenting for very little money that way. Antennas can be a lot of fun.... John Ferrell W8CCW Beware of the dopeler effect (pronounced dope-ler). That's where bad ideas seem good if they come at you fast enough. |
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