Available in 20', 30', 40' and 50' heights. All ROHN Telescoping Masts are pre-galvanized and come assembled with hardware. Erecting the Telescoping Mast is made by simply connecting guys and brackets to the attached unique heavy duty rolled edge guy rings and clamps, extend the sections, insert the locking cotter pins, rotating the tubes to a locked position, and tightening the clamps. The unique ROHN Telescoping Mast design features interior tube flanging combined with a double crimped exterior tube to produce a stronger and more stable joint than most common masts. This exclusive design also prevents sections from accidentally pulling apart and allows disassembly by pulling each section out through the lower end. Each section extends deeper in to the lower tubes than most other Telescoping Mast designs, adding still further to the stability of the structure. H Series heavy duty Telescoping Masts uses 1-1/4' 16 gauge galvanized tubing for top section. All other sections are 18 gauge.

At the heart of every successful radio installation is the antenna support structure, because there is no substitute for a radio antenna that has sufficient height! That is why DX Engineering offers easy shopping of an extensive selection of towers, masts and accessories with super-low. Telescopic Antenna Mast Heavy Duty Base Plate with Collar EZ32C. Made in the USA! Is designed to support and facilitate grounding for ROHN H20, H30, H40, H50 and Channel Master 1620, 1630, 1640, 1650, 1820, 1830, 1840, 1850 Telescopic (Push-up) Antenna Masts. Outer dimensions are 9 x 9 inches with 6 inch tall collar. The best long-range antenna systems are comprised of high gain antennas, good low-noise high gain preamplifiers, quality RG-6 or RG-11 coaxial cable, and good distribution techniques and should be grounded/bonded to NEC requirements. A 40’ to 60’ or higher tower will add range to the system. The antenna however, must not touch the attic floor. Also, remember that the antenna should be attached to the mast right side up, even though the installation appears to be the reverse of an outside installation. Instead of using a mast, you may suspend the antenna from. ROHN 9H50 34 Foot Telescopic TV Wireless Antenna Push Up Mast Made in the USA! Special ROHN Factory Limited Edition Run of the H50 5 section Mast collapses down to 99.25 inches that ships UPS Ground to Commercial and Residential addresses alike, Used for Mounting Off-Air TV, Ham Radio, MMDS and Wireless Internet Antennas (not included) and fits in most elevators for ease of Installation.

This Buyers Guide has will answer many questions you may have on this Product Line. covering many aspects of Various Parts, Accessories and Installation Scenarios... Telescoping Masts are not recommended for commercial, CB or beam antenna installations.

Assembling your antenna system

Antenna Pole Installation Free Standing Indoor

A finished HD60 tower base after pouring at AD8C. It will support an AN Wireless tower 18m high (60 ft).

Constructing of the tower base (III)

First, do you respect the regulation ? For security reasons, like any object erected in height near housings, to avoid that the tower falls on someone or on the housings by high winds, even if it is bolten in a deep concrete base (its top can break), you must legally secure your tower in placing it at a distance of at least 1.5 times its height from any infrastructure In taking a 10m high tower, the legal distance is 15m from housings and 2m away from the neighbour's property, so you need a free space of 34x34m (112x112') or about 11 ares. We will say to you have it.

To last years outdoor any tower has be supported by a sturdy concrete base respecting if not the professional specifications, often too expensive, at least some construction and security standards.

First, for the heaviest or highest installations do not hesitate to request the help of the manufacturer for advice or contact a civil engineering company used to work with such loads.

Assembling a tower requests skills and a serious planning. If this is your first construction, that it is to support a 2-element quad or a bigger gun, it should be interesting that you visit some near building sites to see how they start work on the concrete base or how they construct a big pillar for example. Read also the ham magazines that regularly publish the works of the best handymen as well as books devoted to antennas published by ARRL or RSGB for example that usually reserve several pages to masts and supports (ARRL Handbook, RSGB Antenna File, etc). You could also find these publications in large libraries.

If you purchase a new tower, the manufacturer will provide you detailed instructions for properly constructing the base and assembling the tower. If you have no plan, you can always 'copy' the instructions of any other tower or the ones found in magazines, and if necessary slightly modify the dimensions to your needs, what most amateurs probably do.

The foundations

Any builder used to work with concrete and steel should tell you that a tower should be erected over a concrete base reinforced with a steel-bar framework on which the feet or the tower base assembly will be boltened. This is the classic way of installing a tower safely. The concrete base is driven in a hole from 0.5-1.5m depth (20-60'), depending the weight, the length and the design of your tower. This hole is 20% larger than your tower in order to insert without problem the steel framework just in the middle of the space. The hole must be large enough so that the anchorage system can be partly sunk in the concrete. Place at the bottom of the hole a few big rocks to support the framework. To keep the liquid concrete in position, a wood form made of fir wood boards 5 cm thick (2') is constructed around the top of the hole. If the soil is poroux, crumbly like sand or too soft, the concrete might flows into the ground. In this case densify your concrete and drive a hole twice as large.

Plans for installing a concrete base able to support a tower up to 40 m (140') high. You can reduce the depth to 30 cm for supporting a 3-element directive (~20 kg max) erected 10 meter high. Refer to the text for the explanations. Note that many amateurs drive simply a hole and place directly the feet of their tower in it after have leveled the surface (see next images). To prevent sparks during thunderstorms all metal must be bond each other, using straps or even clamps (red link between the framework and anchorage system). These foundations constitute also a perfect ground connection for your radio equipment. This ground made of 'rods' is called a Ufer ground.

Then construct the steel framework and prepare the anchors (hence the interest to visit a building site). The framework is made of four No.6 RE-bar as long as your hole but shorter, that will be placed vertically near the corners of the hole. All ends should be bent to the inside. This frame is consolidated and bond to horizontal loops made of No.4 RE-bars wired to the vertical rungs each 50 cm (20'). So you need only 3 steel hoops on all the lenght of the framework. After building check all dimensions and that all segments are well perpendicular to each another. It is not mandatory to level the steel framework as it will be sunk in concrete but try to prevent any potential problem.