Clamps are the perfect method to securely lock the segments of the fiberglass mast for a long period. How I got to this result will be explained in the next chapter; for now this result will do. Priceis $5.00 each, plus box & shipping. Note that the pictures show the guy rings with their natural zinc plating before we paint them. var prefix = 'ma' + 'il' + 'to'; Set contains two belts for guying our 18m fiberglass at two levels. The diagrams are very clear, and the kit was easy to set up. The belts are very flexible and lightweight and transfer the forces into the mast over a very large area, thus preventing damage of the fiberglass tubes. It's a good match for the fishing pole masts, and helps keep things stable. At that time, I already felt that this issue is so interesting, complicated and extensive that it would be appropriate to return to it. With temperature below -4 C the possibility of frost creation decreases and at temperatures below -12 C frost does not occur or is very weak. Actually i use 3 of them, not 4, this way the kit is even lighter, and faster to rig, i attach the lines above the 2nd joint (3rd section) with a small rope with 3 loops on it, and i use 3 very small carabiners to attach and for fastening and adjusting the position. Tensioning reel CLPT771allows guylines on portable masts to be quickly and easily tensioned and released. Would it be handy to have something for quick attach or release with a hand? If we look at the simplified model of the guyed mast and the antenna at its top (fig. We do not paint the Quick-links.
And one of the most important and maybe the most challenging task is to get the antenna into the air and keep it there. In other words - we do not need any extreme ropes for guying such an antenna. ), you can then easily walk up the mast. that the force is proportional to square (squared) velocity (e.g. Most of the time I couldn't find a better answer than because I think it's enough or because I saw it somewhere like that. What brings the autumn new to our e-shop? gravity force (mass of the mast, ropes and antennas), antenna - shape (number, length and diameter elements), guy rope - elongation (stretch at working load), strength, total height (the height of the antenna above ground = the height of the mast), the number of the guying directions (3 or 4), the number of guying levels (at how many levels will the mast be guyed), the distance of the guying point from the base, increase of the surface the wind effects and. document.getElementById('cloakeb531f154764a973c88a8d5d93d53fc4').innerHTML = ''; First, I would like to state that I am not an engineer; so, after studying some time, I consulted Engineer Richard Beber, who, unlike me, has studied this issue. Simple but effective design, easy to use. Only registered users can write reviews. If the wind is blowing from the point of guying direction, it is a simple composition of forces - the case of a right triangle where one of the legs is the mast (h), the second one the distance between the mast bottom and the point of guying (r), where the guy rope is the hypotenuse (l). The mass issue is more complicated. ), you can then easily walk up the mast. This email address is being protected from spambots. Hence, as indicated by the name of this article, its main subject is focused on how to guy the antennas. +1-256-384-1008, Automated Attendant This is for simplicity - the reality definitely tends to be different. var addy_texteb531f154764a973c88a8d5d93d53fc4 = 'info' + '@' + 'mastrant' + '.' + 'com';document.getElementById('cloakeb531f154764a973c88a8d5d93d53fc4').innerHTML += '
'+addy_texteb531f154764a973c88a8d5d93d53fc4+'<\/a>'; Guying the masts and vertical antennas - 1. Fiberglass reinforced plastic guy wire mast kits that include a mast, cable, turnbuckles, thimbles, clamps, sleeves, and anchor plates. Zinc-plated steel "square-U" ( |_| ) piece suitable for using as a pivoting base. So - we let the wind blow on the tribander at 130 km/h. the phrase guying in the middle of the mast will have to be understood as guying in the middle of the vertical. This doesn't mean that owners of the self-standing masts won't find something interesting. +1-866-535-4442 (US & Canada). Customer Service Hotline There are five 3/8-inch diameter holes for use with 3 or 4 guy line configurations. Be among the first to know about new products & special offers! of 3, 25 Records Per Page
The larger section of composite material has 6 drilled holes that will accept the ground stakes, or you can use 3/8 inch bolts (not included) to attach to other surfaces (fence posts, tree trunks, concrete pads, deck floors, etc.). TOLL FREE: +1.800.203.2658 (Its specific value is not important at this moment; we will deal with it later - as we are now assessing the influence of the distance of the point of guying.) Note that these only fit at the mast section joints. We see that it is much closer to the mast bottom than the guying distance - the closer it is, the larger the angle between the guys. Further we will introduce the direction from which the wind is blowing - it is the axis between the guying points going through the mast. Monday 8/1/2022, Multi-Function Guying Kit, for Tactical Mini Mast, Each, 5.0 out of 5 stars
If we apply the basic goniometric functions we get to these relations: Fst = Fant * (h / r) * 2 = Fst = Fant * (h / r) * 1,414, Fko = Fant * (l / r) * (2) / 2 = Fant * (l / )r * 0,707, Fst = Fant * (h / r) / cos(60/180) = Fant * (h / r) / 0,5. If you want them in olive drab to match the mast sections, please specify in your quote request. is $45.00 each, plus packaging & shipping, In addition to the above insulator, we have acquired some of the Kwik Block KB-5400 mounting block/insulators (reference. They can also be use as insulated boom mounts for yagi elements. addyeb531f154764a973c88a8d5d93d53fc4 = addyeb531f154764a973c88a8d5d93d53fc4 + 'mastrant' + '.' + 'com'; We do not sell email addresses or other private information.Privacy Policy, Terms of Use | Privacy and Security | Site Accessibility
Therefore, where it is not appropriate in the following text, I will not distinguish between these two types of antennas. (fig. In our considerations, we also do not deal with the behaviour of the antenna itself - we assume that the antenna on the mast does not change. Also, we do have different sizes of rope cleats ACTP##in stock now. & Fax +39(0)627858223 Mob. Send Tel. FAX: +1.828.412.4270. We will divide this task into the following marginal situations - in the first case, the wind is blowing from the guying direction; in the second case, the wind is blowing in between the guys. This email address is being protected from spambots.
Priceis $6.00 each, plus box & shipping. Unit 1 The Green, Fountain Street Macclesfield, SK10 1JN, UK, All prices are in GBP 2022 SOTABEAMS Sitemap eStore Maintained by QeRetail, 30m high quality braided Hi Viz nylon guying line, Wire Winder for easy storage and rapid tangle-free deployment, one specially designed guying ring 31mm internal diameter, Telescopic Masts - SOTAPOLES (7m and 10m), Compact light-weight 10 m (32 ft) "Travel mast", Versatile Top Antenna Insulators (5 pack), Three-band portable dipole antenna system (Band Hopper III), Bandspringer Midi , end fed antenna, 10m-60m, Four-band portable dipole antenna system (Band Hopper IV), Two-band portable dipole antenna system (Band Hopper II). Their experience indicates that frost on the components adds up to 50-100 % and in extreme cases up to 200 % to their original diameter (the component then increases its diameter). The mass of the object m = V * , where V is the volume and the density. If we place an object in the fluid stream, in our case the air, it will cause resistance by the friction and pressure elements. Get The Card, Get The Gear, Get On The Air. The peg has got a 5mm diameter hole usable for attaching guy lines with shackles or rings. The previous chapter shows that the resistance force of the wind is directly proportional to the surface of the antenna perpendicular to the wind direction and, therefore, to the diameter of its components. In addition, 4 galvanized 12-inch long ground stakes are included for use when setting the base assembly directly on the ground. Priceis $7.00 each, or 3 for $20.00, when ordered with a box of mast sections. We're turning up the heat! But no problem at all, I will repair it with glue and its going to work perfectly. The Base Assemby will work with either the standard or ribbed-sided aluminum sections. It can be approximately calculated that the wind's acting force is approximately 775N. We accomplish this by committing all of our resources to achieve superior customer satisfaction. Please. For instance, if you lift a weight of 1 kg, the acting force on you is approximately 10N. Martin Huml, OL5Y/OK1FUA, This email address is being protected from spambots. You can order this part by Contacting Us. 2). If you want them in olive drab to match the mast sections, please specify in your quote request. This is strong high-quality 6061-T6 aluminum. Here you can discuss with others anything related to Mastrant products - what you don't know, or what you want to share with others, so you can help them. I was surprised about that. These strong guy belts are an ideal method for quickly attaching guy ropes to the pole. Very good material was used,
addye7b9dcf6b2572fc8470c0acff41768a0 = addye7b9dcf6b2572fc8470c0acff41768a0 + 'mastrant' + '.' + 'com'; They can also be use as insulated boom mounts for yagi elements. 1), the following forces will affect the system: This set of forces will produce a reaction so that the resulting forces will be balanced. Copyright 2021 Alltec Global All rights reserved. The carabinersAHOS##with a smooth surface might be the right choice. We now provide them in unpainted aluminum. The Quick-links offer a nice smooth surface to tie/wrap guy lines. Overall length is 11 inches and width is 5.5 inches. For instance, calculations of forces acting on the antenna in the wind or other matters might be useful. Customers outside the UK pay the lower (Ex. Priceis $45.00 each, plus packaging & shipping. Piece is 2.25 inches long, 1.5 inches wide with an inside spacing just right for a snug fit on the female end of the aluminum mast tube. Depending on your total height and top load (antenna, mount, pulley, etc. We do not paint the Quick-links. Here, I would like to thank him - the article wouldn't have been written if it weren't for him. Two of these can be used as insulators to mount on a 6X6 inch vertical post; then use stainless steel hose clamps to attach the aluminum mast tubes. We recommend the use ofQuick-links, Snap-links, or some form of metal hook assembly, for attaching the guy lines to the rings. A brief remark about the calculation: for the sake of simplicity, we would again consider an antenna consisting of tubes or rods. However, some countries require you to pay tax on imported parcels. No further adjustments are necessary. In addition to the above insulator, we have acquired some of the Kwik Block KB-5400 mounting block/insulators (referencehttp://www.kwikblock.com). There is a matching 3/8 inch round hole in the top of each leg, and a 3/8 inch square hole in the bottom. For the best experience on our site, be sure to turn on Javascript in your browser. Not had any rought weather to contend with yet and may need to consider more substantial pegs (less likely to rotate). In the following tables you will see the force calculated for both versions of guying (3 and 4 directions) and for the guying of 10 and 5 m. I think it is obvious that bringing the guying points closer to the mast results in unnecessary increase of the acting forces. Great setup, easy to pack and it all stays orderly on the winder. These are very easy calculations - if you wish to design an antenna system for extreme frost, multiply the forces by 3. This special top segment of our 12m fiberglass pole, enables easy attachment of any kind of device to the tip of the pole. Provides an adjustable 4-guy system for maximum stability. As can be found in a lot of places, even a relatively weak rope will endure if its designated for this purpose. Our mission is to exceed the expectations of our customers. in it's contact with the surface of the ground, object or other subjects at the temperature of 0C and below; precipitation (sublimation) of air's humidity on a sufficiently cold surface of the ground or subjects and that even without the presence of fog or clouds. From the theoretical perspective, which is probably boring for most of us, we move on to practical effects. We can determine the resistance force acting on the mast in a similar way. A short length (7-inches) of aluminum mast section is included for easy connection to your mast sections. This heavy-duty base assembly (used in our Vertical Antenna Kit) is made from two pieces of composite material (high density polyethylene and wood flour) fastened with long lasting stainless steel hardware and includes a heavy duty zinc-plated steel U-shaped pivot piece. I ask the experts and linguists for leniency - I use these terms as I know them from amateur practice: A vertical antenna is actually a mast without the antenna. JavaScript seems to be disabled in your browser. Putting the mast up the second time is much easier with 2 people. That is again a completely different topic. Overall length is 11 inches and width is 5.5 inches. When the wind is blowing from the direction of the axis between the guys the situation is somewhat more complicated, because we have to bear in mind the angle between the guys - in other words, to how many directions the mast is guyed.
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