How to Make Semi Rigid Coax

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How to Make Semi Rigid Coax
Semi-rigid coaxial assemblies are designed for maximum durability. (two coaxial cables image by Albert Lozano from Fotolia.com)

Semi-rigid coaxial cable is different in appearance and construction than the coax supplying your cable television signal. Used in military and other environments where high levels of shock are possible and damage resistance is essential, semi-rigid coaxial cable is designed to offer reliability in environments that conventional coaxial cable cannot offer. Additionally, semi-rigid coax has the unique ability to hold its shape once bent into position, due to the inner copper corrugated shell.

Skill level:
Easy

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Things you need

  • Fine-blade cutting saw
  • Corrugated semi-rigid coaxial cable
  • Semi-rigid coaxial connectors
  • Coaxial strip tool
  • Soldering iron
  • Lead-free solder

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Instructions

  1. 1

    Cut the outer corrugated coax to the length necessary, using the fine-blade saw. Make the cut as straight as possible.

  2. 2

    Slide the SMA coaxial nut down the outer tubing and out of the way temporarily.

  3. 3

    Lay the end of the coaxial cable into the coaxial strip tool. Grip the handles and rotate the tool until the outer jacket is fully scored. Pull the cut material off while continuing to grip the handles of the tool. You will see the copper and white plastic corrugated inner sections, with the corrugated centre conductor.

  4. 4

    Slide the centre pin over the centre conductor of the cable. Solder through the exposed hole on the side of the centre pin.

  5. 5

    Slip the reducer over the end of the coaxial cable, until the inner collar sits against the inner white plastic tubing of the coax cable. Apply a bead of solder into the solder hole at the base of the reducer.

  6. 6

    Slide the nut up the tubing and screw it to the reducer on the coaxial cable. Repeat the process for the other end.

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