Horizontal Loop, Vee Beam, Hustler Vertical and Cubex Quad Antennas Horizontal Loop, Vee Beam, Hustler Vertical and Cubex Quad Antennas and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications . Operation of The CubeX 3D Printer creates the model by pulling filament from the cartridge through the print jets via the delivery tubes. A. US Mail: TENNADYNE, L.L.C. P. O. Box 352 Alto, MI 49302 *The dbi gain figures are fictitious, but since other antenna manufacturers tend to use them to manipulate things in their favor by enhancing their specifications with phony data, we've added them so that you can get accurate comparisons. I would like to put the cubex up 30 ft on top of a mast and the G5RV below it in a inverted V It should work just fine. I'd suggest putting the center of the Quad at least 51 inches above the G5RV wires based on a simple antenna aperture model you can find on GM3SEK's web page for stacking antennas. Tecnicoloco, the specs show a 1 mHz bandwidth below 2:1. This is likely centered near the middle of 11 meters as it is cut to CB band. Admittedly this is a bit narrow, but you might be seeing very good gain set this way, all-be-it at the expense of some rejection to the back. This feature is not available right now. Please try again later. A number of these quads have been built, using these formulae, with slight variations in wire diameter, but always using bare hard drawn copper wire.All have delivered the goods with no adjustment of element size, giving good gain, f/b, and bandwidth. I emphasize once more, that if you use insulated wire, or bare copper, different to what I have used, The above measurements will not be correct. [ CUBEX LTD — AN OVERVIEW Cubex is an industry leading drill rig manufacturer focused on the design and service support of a wide range of underground and surface in-the-h*** ( ITH ) drilling equipment. mk ii 2 element complete 3 band (10, 15, 20m) antenna - 5 band (12m, 17m) 8- deluxe fiberglass quad arms - 13ft. 2- cubex quad spiders-one piece casting for max strength 356t6 heat treated alum. for 2" -o.d. One of the best antenna values on the market is the LightningBolt Quad. At about half the cost of a tri-band yagi, you get five band coverage with a single coax feedline and excellent performance from a light, low wind load antenna. Like anything else in life, the quad has its pros and cons, but I believe the pros outweigh the cons. The book, Cubical Quad Antennas : How to Build and Adjust Quads by William I. Orr, Stuart D. Cowan. Unfortunately, this book is now out of print. The article, Update on the Pfeifer Quad System, appeared in the September 2001 QST. The ARRL website also has a number of other articles on the topic. In a way, I'm kind of geeked about doing this.