Connect the VHF radio to the SW meter, and the other port of the SW meter to end of the coax that connects from the mast to the AIS splitter. A Bird 43 power meter was used to evaluate performance in our VHF antenna test.

Testing VHF Coaxial

The loss in RF coaxial cable increases substantially and quickly, when there is water intrusion. Coax that uses foam dielectric, like RG8X and LMR type coax, is particularly prone to this problem because the water can quickly propagate along the foam dielectric used in these type coaxes.

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