That is pretty much the recommended test. Her is the US Coast Guard's version:
https://www.dco.uscg.mil/Portals/9/DCO%20Documents/5p/CG-5PC/INV/Alerts/1318.pdf?ver=2018-08-16-091109-630 Ken H. On Mon, 10 Feb 2020 at 21:24, Bruce Whitmore via CnC-List < cnc-list@cnc-list.com> wrote: > Hi Jeff, > > I read your post below with interest, and just to test my stern light (in > which I use an Amazon LED bulb) I took my handheld, turned it to 16, and > literally held the antenna up to the lens with the light on. No change in > the static was noticed, nor when I had the squelch set just right did it > trigger any noise. > > You mention that "you might never hear it". Is there any way to truly > test for this besides what I did? > > Thanks for the insights, > > Bruce Whitmore > > (847) 404-5092 (mobile) > bwhitm...@sbcglobal.net > > > On Thursday, February 6, 2020, 9:17:35 AM EST, Della Barba, Joe via > CnC-List <cnc-list@cnc-list.com> wrote: > > > Some LEDs produce large amounts of RFI well into the VHF spectrum. > Interference at HF frequencies is certainly an issue, but most of us aren’t > on the SSB all day and the noise is pretty obvious in SSB or AM modes. I > can turn lights on and off until it goes away. > > Noise up into VHF is far more insidious. You might never hear it, but it > can severely de-sense FM reception anyway. AIS is tricky, no one listens to > AIS, so you will just wonder why you have no targets that are not 1 mile or > less distant. LED anchor lights or masthead running lights can be the worst > of all, they are right next to the VHF antenna. > > > > Joe > > Coquina > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > >
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