There are some LED anchor / tricolor lights that do not generate any interference. It depends on the type of regulator
used to drive the LEDs; a switching regulator can be noisy, while a linear regulator will be silent.
I've got an "Amazonia" tricolor/anchor light from Optolamp (Optolamp - Optolamp - Signalization
), and while located right next to my VHF antenna
it creates zero measurable interference. I am 99% certain that the Amazonia uses a quiet linear regulator, and while I haven't tested it I assume that their anchor light does too.
Another option is the upcoming "FrankenBebi" anchor light, being designed and built as an open-source project
: FrankenBebi Project - Home
. This has been discussed here on Cruisers Forum. I can personally guarantee that this anchor light will be radio-silent, since I designed the circuit.
Of course an old fashioned incandescent bulb anchor light will generate no interference, but it sure burns a lot of amp-hours.
It is possible that you will be able to reduce the interference from your current
light by soldering some filter capacitors to the power connection right at the light, and perhaps putting ferrites on the power leads. I suspect that this will not make much of an improvement if the light and antenna