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
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