Several antenna manufacturers sell multiband antennas that consist of a vertical piece of tubing, usually 16 to 20 feet long. The tubing is used with a loading coil at the ground end. By making appropriate taps and adjustments on the coil the antenna can be matched (or closely matched) on any given band. This type antenna has no traps.;Oct 23, 2019Vertical antenna systems, losses, and efficiency. One of the simplest antennas to have, and to model, is the quarter-wave vertical. The radiator is about a quarter of a wavelength for the desired center frequency, and can be a wire, set or cage of wires, or a pole, typically made of aluminum.;7. Besides mechanical differences, the primary difference between aluminum and copper in antenna construction is RF resistance. Copper will have slightly less RF resistance for the same surface area. Increasing the surface area slightly allows aluminum to exhibit the same RF resistance as copper. RF resistance is unique due to the tendency of the RF current to crowd around the surface of the conductor.;The loading coil is nominally 8-10 turns of common ¼ in. soft aluminum or copper tubing. It must be at least this large in diameter (12 in.) and also very widely spaced (3 in.). Otherwise there will be loss due to coil resistance and skin effect from adjacent turns. In EZNEC, rather that using the;Jan 09, 2011Mark you could use copper pipe but you need to consider the extreme weight you'll have. Copper pipe is ok for many vhf/uhf, some vhf-low(6 meters) and a few 10 meter antennas. A better choice might be aluminum tubing but it will still be very heavy for the antenna you mention.;DX Engineering High-Strength Aluminum Tubes are ideal for your antenna projects. They are available in two types. 6063-T832 seamless drawn aluminum tubing is available in 3, 6 and 12 ft. lengths. 6063-T832 tubing provides good resistance to general corrosion, including stress corrosion cracking, and an excellent surface appearance. Use a series of 3 ft. lengths to build an element that tapers

Vertical made from wire vs. aluminum tubing (and hose

Mar 31, 2020A vertical made from wire will no doubt exhibit a resonance that is narrower in bandwidth than it would be when using aluminum tubing. Also, I wonder if any of you have built a 1/2 wave vertical from both wire and aluminum tubing for an "A2B" comparison.;Or 3/8” or ½” diameter aluminum tubing from Texas Towers or your local hardware store. z. You can solder to aluminum with aluminum solder paste from solder-it. Make brass coupling interconnects for the rods and coils. z. Use 1/8 NPT brass nipples and couplings. z. Ream out couplings (use 3/8” drill bit) to fit over 3/8”;DX Engineering High-Strength Aluminum Tubes are ideal for your antenna projects. They are available in two types. 6063-T832 seamless drawn aluminum tubing is available in 3, 6 and 12 ft. lengths. 6063-T832 tubing provides good resistance to general corrosion, including stress corrosion cracking, and an excellent surface appearance. Use a series of 3 ft. lengths to build an element that tapers ;Mar 31, 2020A vertical made from wire will no doubt exhibit a resonance that is narrower in bandwidth than it would be when using aluminum tubing. Also, I wonder if any of you have built a 1/2 wave vertical from both wire and aluminum tubing for an "A2B" comparison.;Wide range of aluminum tubing available. Tubing for Maco and Gizmotchy antennas available by part number! Find tubing for other antennas, homebrews, or other projects.;With material left over from my base-loaded designs, I have decided to make a center-loaded vertical for 80 mtrs. I have a section of 1.5 m (5 ft) copper tubing (16 mm OD, 5/8"), and 2.5 m aluminum tubing (7½ mm OD). OK, so the coil will not be exactly at the half-way point of the 4 mtr "short" antenna.;Oct 04, 2017The aluminum tubing will be reinforced with 1/2 inch pvc pipe that fits well. Question? what is the best way to guy it. FYI the Ham that sold it to me ;Jul 03, 2012All of my J-Pole and Slim Jim antennas are constructed out of Type-M hard copper tubing. Type-M, also known as Red Copper is primarily used in the plumbing industry for supplying drinking water in homes and businesses. Although with the cost of copper continually increasing, the construction industry is shifting towards other materials for plumbing. But like []

Why a Beam Antenna?

small coil mounted at the center of the dipole. The electrical circuit for the antenna is shown at Fig. IA. The coil is made from 1/8-inch-diameter copper tubing and consists of 5 turns, one inch in diameter with 1/4-inch spacing between turns. The ends of the tubing at the center of the antenna should be flattened with a hammer or in a vise. A;The 1/4 wave vertical element is mounted above the bottom mast separated by a fiberglass rod insulator. The mast and element material is telescoped six foot aluminum tubing sections. The materials for a 20 Meter antenna mast, insulator, and radiating element, from bottom to top, are: 1.250" x 6' aluminum tubing 1.125" x 6' aluminum tubing;Jul 03, 2012All of my J-Pole and Slim Jim antennas are constructed out of Type-M hard copper tubing. Type-M, also known as Red Copper is primarily used in the plumbing industry for supplying drinking water in homes and businesses. Although with the cost of copper continually increasing, the construction industry is shifting towards other materials for plumbing. But like [];With material left over from my base-loaded designs, I have decided to make a center-loaded vertical for 80 mtrs. I have a section of 1.5 m (5 ft) copper tubing (16 mm OD, 5/8"), and 2.5 m aluminum tubing (7½ mm OD). OK, so the coil will not be exactly at the half-way point of the 4 mtr "short" antenna.;Does the particular metal used in antenna elements make any difference in element length or spacing, i.e. 1/2" aluminum tube vs 1/2" copper tube? I know that length and diameter have an effect on resonance and impedance, but does the particular metal? My question is specifically about element length vs type of metal element.;Several antenna manufacturers sell multiband antennas that consist of a vertical piece of tubing, usually 16 to 20 feet long. The tubing is used with a loading coil at the ground end. By making appropriate taps and adjustments on the coil the antenna can be matched (or closely matched) on any given band. This type antenna has no traps.

Question About Vertical Antenna Coil Vs Aluminum Tubing

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