How to build a lnb bracket for satellite dish

Written by michael arcand
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An LNB bracket is used on a satellite dish to hold the low-noise band (LNB) element in place where it can receive optimal signal from an orbiting satellite. Each satellite system comes with an LNB bracket that is used with the dish provided. This article will discuss the set-up of a standard LNB bracket with a satellite dish and what the most important areas are to consider if you are modifying an existing bracket or building your own.

Skill level:

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Things you need

  • LNB element
  • RG6 coax cable
  • Zip ties
  • Satellite dish
  • LNB bracket
  • RTV Silicone

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  1. 1

    The Low Noise Band (LNB) mounting bracket is initially attached to the centre rear of the satellite dish using four bolts with lock washers and nuts on a standard 18-inch dish.

  2. 2

    Larger satellite dishes that are 36 inches and up alternately have a tripod LNB mounting system with the three arms being connected to the two sides and bottom of the dish, coming to a point in front of the dish where the LNB will be placed.

  3. 3

    When modifying or constructing your own LNB bracket, the two most important things to remember are the distance of he LNB from the dish and the angle of where it is pointing. For maximum signal the LNB should be placed at a distance that forms an equilateral triangle from the two side edges of the dish to where the LNB will sit. This allows the dish's reception to be focused on the point where the LNB is mounted.

  4. 4

    Ideally you will want the LNB to be directly in front of the dish, and the tripod method accomplishes this much better than the single arm units. Either way you want to make sure that you angle the LNB so that it is pointing at the centre of the dish. With a factory supplied unit, these considerations are already taken into account.

  5. 5

    Run the coax cable through the mounting apparatus and connect to the LNB before securing the it to the mount. Once the connections are made as weatherproofed either using a rubber boot jacket supplied with the cable or some RTV silicone, secure the LNB to the bracket using the supplied hardware or a small bolt with lock washer and nut. Secure the cable using zip ties.

Tips and warnings

  • Sealing all outdoor connections prevents water from interfering with the signal later on.
  • Manufacturer's hardware is proprietary and non-interchangeable.
  • Modifying manufacturer's original equipment will void warranty and should definitely not be done if the equipment is rented.

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