Amphenol RF 930-108P-51S QMA Plug Assembly Guide (RG-402 Semi-Rigid Cable)

Interconnect
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This post summarizes the assembly procedure for the Amphenol RF 930-108P-51S QMA Straight Plug used with RG-402 (.141" semi-rigid coaxial cable), based on the manufacturer’s assembly drawing.

Assembly Procedure

  1. Prepare the RG-402 cable according to the dimensions shown on the assembly drawing.
  2. Deburr and clean all cut surfaces.
  3. Slide the heat-shrink sleeve onto the cable before installing the connector.
  4. Insert the prepared cable into the connector body until fully seated.
  5. Solder the center conductor through the solder access hole as shown in the drawing.
  6. Allow the solder joint to cool and inspect for proper solder flow.
  7. Position the heat-shrink sleeve over the rear of the connector and cable transition.
  8. Apply heat evenly until the sleeve fully recovers.

Final Inspection

  • Connector fully seated on the cable.
  • Center conductor properly soldered.
  • No excess solder or debris inside the connector.
  • Heat-shrink sleeve correctly positioned and fully recovered.
  • Connector interface clean and undamaged.

Following the recommended cable preparation dimensions and assembly sequence is essential to achieve the specified mechanical and RF performance of the 930-108P-51S assembly.