I was just about to send out a similar email. Below is a link to a
Passagemaker.com <http://passagemaker.com/> article regarding “Potential LED
Interference With VHF, DSC, and AIS Communications “. In short, the main issue
are LEDs in proximity to antennas.
In my case, I have a mast head antenna and a LED anchor bulb. I have not
noticed any issues, but then I don’t usually have the VHF and the anchor light
on simultaneously. But the test they outline seems simple, so why not test all
LEDs.
1. Turn off LED lights
2. Tune VHF radio to a quiet channel (USCG gives Ch 13 as an example,
though this may not be the best channel in all waterways)
3. Adjust the VHF radio's squelch control until the radio outputs audio
noise.
4. Re-adjust the VHF radio’s squelch control until the audio noise is
quiet, only slightly above the noise threshold.
5. Turn on the LED light(s), do this for each circuit/type of lights
(spotlight, navigation lights, deck lights, interior lights (by area of the
boat).
1.If the radio now outputs audio noise, then the LEDs have
raised the noise floor. (Noise floor is generally the amount of interfering
signals / static received beyond the specific signal or channel being
monitored.)
2. If the radio does not output audio noise, then LEDs have not
raised the noise floor.
https://www.passagemaker.com/trawler-news/led-vhf-interference?utm_source=passagemaker-enewsletter&utm_medium=email&utm_content=morelink&utm_campaign=enewsletter-082118
-
Paul E.
1981 C&C Landfall 38
S/V Johanna Rose
Fort Walton Beach, FL
http://svjohannarose.blogspot.com/
> On Aug 21, 2018, at 12:00 PM, [email protected] wrote:
>
> Date: Tue, 21 Aug 2018 11:58:12 -0400
> From: "Bill Coleman" <[email protected] <mailto:[email protected]>>
> To: <[email protected] <mailto:[email protected]>>
> Subject: Stus-List USCG Notification of LED Interference
> Message-ID: <450f01d43967$c3ce29f0$4b6a7dd0$@net>
> Content-Type: text/plain; charset="utf-8"
>
> Maybe these LED's are the cheap EBay kind, I checked MarineBeam site, and
> hopefully they have this handled.
>
>
>
> The Great Lakes Cruising Club sent out notification of this potential issue
> today.? The USCG bulletin can be accessed at the following site-
>
> https://www.dco.uscg.mil/Portals/9/DCO%20Documents/5p/CG-5PC/INV/Alerts/1318.pdf?ver=2018-08-16-091109-630
>
> <https://www.dco.uscg.mil/Portals/9/DCO%20Documents/5p/CG-5PC/INV/Alerts/1318.pdf?ver=2018-08-16-091109-630>
>
>
>
>
> https://store.marinebeam.com/controlling-emi-1/
> <https://store.marinebeam.com/controlling-emi-1/>
>
> I have heard that Fluorescent bulbs are one of the worst line polluters.
>
>
> Bill Coleman
> C&C 39 Erie, PA
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