Crimping and Sealing for a Life Offshore

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Mast antennas, like all electrical components, are particularly vulnerable to water intrusion at connectors. In the extreme, corrosion at unions or terminals can damage a transmitter.

  1. A crimping tool with matching dies for N-type connectors is available online from most radio equipment suppliers like Quicksilver Radio.
  2. This N-type connector from Amphenol is more resistant to water intrusion than the industry standard PL259, which needs to be carefully sealed to prevent water intrusion.
  3. A nearly assembled PL259 connector is ready for soldering. When installed properly, these connectors are rarely a source of power loss, but they must be carefully sealed.
  4. To seal external connectors, the connector should be filled with coaxial dielectric grease, taped with self-amalgamating tape (shown here) and then taped again with vinyl electrical tape.
  5. Solderless PL258 connectors are popular among do-it-yourselfers because they are quick to assemble. PS recommends these only for temporary repairs. A coaxial cutter (top) ensures clean, straight cuts.

Darrell Nicholson
Darrell Nicholson is editor emeritus of Practical Sailor. He is a longtime liveaboard sailor and has logged tens of thousands of miles in three oceans. A winner of dozens of writing awards in disparate genres, he currently edits Marine Electronics Journal for the National Marine Electronics Association. He holds a U.S. Coast Guard 100-ton Master license and sails his S&S-designed Yankee 30, Opal, out of St. Petersburg, Florida. He can be reached at darrellnicholson.com.