RFI can be hard to figure out, and throwing
money in the form of "maybe" new
equipment isn't something I'd usually suggest. However, not all coax cable is the same, and most if not all of the
marine coax on the market does not have a 100% shield in the "shield" layer. Combine that with the fact that as coax ages, the properties of it change, and if it hangs unsupported in the
mast (as almost all of it does) the section in the
mast pulls itself thinner, like taffy on a hot day, degrading itself a bit more every year.
So, if your cable is ten years old? It might make sense to replace it with a premium grade new cable, properly supported and with a 100% shield layer, and see if that also cures the RFI problem at the same time.
Or, borrow, buy, or build an inexpensive "emergency"
antenna, and see if the
VHF still picks up the RFI when using that. (Quicker & simpler than expanding the
project list with a new
antenna cable.(G)
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