Moisture in Coax...

[K0RGR]

Crackling in the received signal does indicate an intermittent connectin someplace, not so much water. I've never had a problem with water in LMR400. But a poor connection - maybe a poorly soldered shield? Antennas with fiberglass bodies sometimes develop intermittents between sections that will crackle in the wind.

[HUGH]

Moisture in your coax can cause corrosion, especially if the screen contains aluminium foil, aluminised mylar or even copper. It will still work well for a long while if you can dry it out, but if not, aluminium foil will disintegrate over time. Here speaks another one who uses RG6, CT100 or anything stocked at the local electrical wholesaler.