ASSEMBLY INSTRUCTIONS FOR THE SCIGN SHORT RADOME

• Place the dome over the top of the antenna so that it now rests on the outermost edge of the antenna ground plane.

• Align the holes in the dome with the threaded holes in the outermost choke ring.
  • the north indicator line, a vertical ridge that goes up from the base of the dome just adjacent to the SCIGN logo and part number info, should be oriented towards the north.
    

• Using the T27 screwdriver [or T27 L-key] and the twelve 1-1/4" length pin-in-torx 1/4"-20 screws, attach the dome to the antenna.
  • First emplace the screws loosely at the N, E, S, W holes.

  • When emplacing the first few screws, it may be necessary to lift the dome slightly with respect to the antenna so as to get each screw to seat and start into the threads. It may also be necessary to press, wiggle, and turn the screws before they have met with the threads, as they do fit rather snuggly into the through-holes.

  • Tighten opposing screws sequentially (e.g., N, S, and then: E, W) but only snuggly (not firmly) so as to distribute any gaps and warping evenly (and to center the dome on the antenna; there is a built-in gap between the antenna and the dome assembly that we want to spread out). Then emplace and tighten the remainder of the screws. Turn each screw 3/8 to 1/2 of a turn beyond 'snug.' We expect this to result in a final torque of about 35-40 in-lbs. [which is well below the thread-stripping torque of some 80 in-lbs.]

last update March 24 at 1:15 p.m.

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