[600MRG] Low RF Noise LED Light Bulbs
Larry
Telegrapher at Q.COM
Thu Sep 5 13:38:38 EDT 2019
I have about a dozen of them i bought a year or so back around the house
including here in the shack in a
single bulb outlet. I don't hear any noise anywhere and the light is
about 6 feet from the radio. I get more
noise from the computer screen, especially when it's loaded with text
than anyplace else. Normal noise
level here is S-2 or less most of the time on bands above 30M.
Course the noise source here on 40 and down depends a lot of what's
happening in the medium.
To broad of a statement? Oh well, hope you all get the idea.
Larry
W0OGH
On 9/5/2019 7:05 AM, Scott Armstrong wrote:
> I've swapped out most of the incandescent bulbs in the house for LEDs
> and have had no noticeable change in noise levels (or I just haven't
> found the noise yet). The bulbs are from different manufacturers.
> Just recently bought some more LED bulbs made by EcoSmart. They are
> part 15 compliant bulbs. Can't say that for the others.
>
> I also replaced the 4ft fluorescent lights in the kitchen with LEDs
> and started replacing the 8ft ones in the garage. Nice bright light
> but what crap they are. They generate noise from just below 10MHz to
> above 144MHz.
> Haven't had the time to see if I can tame the noise any by putting
> filters on the AC line and toroids on the individual fixture wires.
>
>
> Good Luck,
> Scott AA5AM
>
> On Thu, Sep 5, 2019 at 7:09 AM John Langridge <kb5njd at gmail.com
> <mailto:kb5njd at gmail.com>> wrote:
>
> Hi Les,
>
> My experience with LED bulbs has been that for the one's I have
> tried, none work well across the the entire spectrum all the
> time. Load conditions seem to also impact where they will make
> the most noise and temperature is also a factor.
>
> I don't know the brand (kirkland?) but Costco has a large
> multipack of LED bulbs that are insanely bright. I use them on my
> front and back porches. During the Summer when its hot here in
> Texas, the noise seems to shift higher in frequency, into the
> upper broadcast band but below 160m. That's a workable solution
> for me as I operate on 630 meters. I also don't hear these bulbs
> in the 630m band under any of the load conditions I can present
> (other lights and appliances on at the same time). Im sure there
> is some combination that will become a problem, however.
>
> During the Winter its different. If temperatures are below about
> 45 degrees and both of those porch lights are on, The signal is
> right in the middle of the 630m band and its bad on two of my rx
> antennas. If I turn off the back porch light and change the load
> condition, the noise goes away on those antennas. So during the
> Winter when I am operating on 630m, I turn off the back porch light.
>
> Every situation will likely be different so you might buy these
> same bulbs that I have mentioned and have a completely different
> experience. I'm afraid its probably going to be a trial and error
> situation for you as every house will have a bit different wiring
> topology. I bought incandescent bulbs for the remainder of the
> house (you can get them on the internet), which cost considerably
> more to operate but its worth it to me.
>
> 73/GL
>
> John
>
> On Thu, Sep 5, 2019 at 5:52 AM Les Rayburn <les at highnoonfilm.com
> <mailto:les at highnoonfilm.com>> wrote:
>
> Budget is very tight here. A couple of years ago, my wife and
> I converted all the lights in the house from CFB to LED lights
> and the savings on our monthly bill have been signifiant. $22
> dollars a month on average.
>
> The downside is that the LED bulbs put out a lot of noise on
> LF, MW, and HF.
>
> A few months ago, I saw a thread about some LED bulbs that
> were ham-radio friendly, putting out considerably less EMI
> than other bulbs. Alas, the link was broken.
>
> Has anyone found an LED light bulb that is radio-friendly? If
> you have links to directly purchase them, even better.
>
> Thanks in advance.
>
>
> 73,
>
> Les Rayburn, N1LF
> 121 Mayfair Park
> Maylene, AL 35114
> EM63nf
>
> Member WTFDA, IRCA, NRC. Former CPC Chairman for NRC & IRCA.
>
> Elad FDM-S2 SDR, AirSpy SDR2, SDRPlay RSP-2 Pro, Sony XDR-F1HD
> [XDR Guy Modified], Dennon TU-1500RD, Sangean HDT-1X, Ray Dees
> RDS Decoders, Korner 9.2 Antenna, FM-6 Antenna,
> Kitz Technologies KT-501 Pre-amps, Quantum
> Phaser, Wellbrook ALA1530 Loop, Wellbrook Flag, Clifton Labs
> Active Whip.
>
> “Nothing but blues and Elvis, and somebody else’s favorite song…”
>
>
>
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