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Several years ago, on our previous boat, we installed an OGM LED combo anchor/tricolor mast head light. OGM was supplying to the military, who subsequently put out a warning about LED navigation lights creating radio interference.
Whenever the anchor light came on (photocell controlled), we had to squelch the VHF radio, quite a bit. The LEDs made quite the racket on the VHF, significantly reducing its range.
We had this problem until we replaced it with Signalmate unit. It was radio silent.
~~~⛵️~~~Matt Salatino A50#27, Speed of Life
On Feb 8, 2021, at 10:20 PM, Mark Erdos <mcerdos@...
If there is any noticeable RFI caused by an LED, a snap on
ferrite at each end of the power source should do the trick. If possible buy
only LED’s with a FCC Part 18 compliance rating. It is worth noting a few year
ago, ARRL published a white paper on RFI and bulbs. It was found “bulbs have
generally not proven to be a significant source of RFI”
- Cream Puff - SM2K - #275
cruising - Tahiti, French Polynesia
This is what
I installed in Aqua Signal 40. It is from Dr LED and I believe that it
overcomes most if not all of the issues that Bill K described.
I know people do it all the time, but it is generally a bad
idea to install LEDs into red and green navigation light fixtures designed for
incandescent bulbs, like the Aqua Signal Series 40.
LEDs retrofitted into these fixtures typically do not give the designed
brightness with the colored lenses. "White" LEDs are not truly
broad spectrum white light, but actually produce a series of narrow cut
frequencies that, when averaged together by our eyes, appear to be white.
The problem is that these bands do not necessarily line up well with the
colored lenses that are used to filter the light from an incandescent bulb, so
less light, sometimes a LOT less, gets out of the lens than would be true with
an incandescent bulb of the same nominal brightness.
You will rarely get the hoped for designed life out of an LED retrofitted into
a fixture that is not hermetically sealed. Lastly, there is the issue of
VHF radio interference that is frequently poorly controlled with retrofit
If you want to go to LED bulbs, and that is certainly a very good idea for a
lot of reasons, it is far better to switch to a fixture designed for them.
Charleston, SC, USA