<HTML><HEAD></HEAD>
<BODY dir=ltr>
<DIV dir=ltr>
<DIV style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial'; COLOR: #000000">
<DIV>LED light EMI is all over the spectrum, literally!</DIV>
<DIV> </DIV>
<DIV>It’s not usually the LED itself that generates the RF, but rather the
driver electronics. Cheaper ones can generate a TON of RF, usually they
went cheap on the filtering and shielding. </DIV>
<DIV> </DIV>
<DIV>I have installed LED lights and fixtures in most of my house now.
When we had our kitchen remodeled, we did ALL LED fixtures, except for two
chandeliers. I have since installed after market LEDs in those two as
well, except for ONE 60W incadescent that is there to keep the X10 controller
happy. I also have LED floodlights outside. Throughout the rest of
the house, I have replaced most of the regular bulbs with LED versions from
Costco. Our local utility has provided significant instant rebates two
years in a row, which I took advantage of.</DIV>
<DIV> </DIV>
<DIV>I have not had a significant amount of RF noise coming from the LEDs.
I cannot say the came for CFLs. I had a CFL on the other side of the house
that took out all of HF when it was on. Since I HATE CFLs anyway, and the
gov’mt mandate even more, I put a regular bulb back in until I could get an LED
replacement. (Let’s start a movement to bring back the 100W incadescent
bulb, as oil is now cheap again!! kidding)</DIV>
<DIV> </DIV>
<DIV>I did have one replacement LED bulb that was noisy, it came from Walmart,
and was rather cheap. I ended up taking the package back.</DIV>
<DIV> </DIV>
<DIV>I still have eight florescent fixtures in the house, and I just bought four
LED replacement fixtures. Two of these are in the shack, so this will be a
good test.</DIV>
<DIV> </DIV>
<DIV>Bottom line, is that you need to test the specific LED bulb or fixture to
see how much RF trash it generates. With replacement bulbs, the driver is
actually inside the bulb itself.</DIV>
<DIV>73, Terry, WB4JFI</DIV>
<DIV> </DIV>
<DIV
style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
<DIV style="FONT: 10pt tahoma">
<DIV><FONT face=Arial></FONT> </DIV>
<DIV style="BACKGROUND: #f5f5f5">
<DIV style="font-color: black"><B>From:</B> <A title=KB3MYC@arrl.net
href="mailto:KB3MYC@arrl.net">Mitch Buchman</A> </DIV>
<DIV><B>Sent:</B> Wednesday, January 14, 2015 1:12 PM</DIV>
<DIV><B>To:</B> <A title=richardoneill@earthlink.net
href="mailto:richardoneill@earthlink.net">Richard O'Neill</A> </DIV>
<DIV><B>Cc:</B> <A title=tacos@amrad.org
href="mailto:tacos@amrad.org">tacos@amrad.org</A> </DIV>
<DIV><B>Subject:</B> Re: LED bulbs</DIV></DIV></DIV>
<DIV> </DIV></DIV>
<DIV
style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
<DIV dir=ltr>
<DIV>Has anyone done any EMI testing on these bulbs? I have had some errant
behavior with the transceiver in my garage door opener after replacing an
incandescent bulb with an LED bulb. The bulb sits inches from the radio and I
haven't taken the time yet to characterize these bulbs with a spectrum
analyzer.<BR><BR></DIV>Mitch Buchman, KB3MYC<BR><BR></DIV>
<DIV class=gmail_extra>
<DIV> </DIV>
<DIV class=gmail_quote>On Wed, Jan 14, 2015 at 1:02 PM, Richard O'Neill <SPAN
dir=ltr><<A href="mailto:richardoneill@earthlink.net"
target=_blank>richardoneill@earthlink.net</A>></SPAN> wrote:<BR>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Karl,<BR><BR>I
don't have the newsletter but may I assume your procedure is akin to this
one?<BR><A
href="http://www.instructables.com/id/120V-LED-bulb-on-12VDC-190MA-The-hack/#step2"
target=_blank>http://www.instructables.com/<U></U>id/120V-LED-bulb-on-12VDC-<U></U>190MA-The-hack/#step2</A><SPAN
class=HOEnZb><FONT color=#888888><BR><BR>Richard</FONT></SPAN>
<DIV class=HOEnZb>
<DIV
class=h5><BR>______________________________<U></U>_________________<BR>Tacos
mailing list<BR><A href="mailto:Tacos@amrad.org"
target=_blank>Tacos@amrad.org</A><BR><A
href="https://lists.amrad.org/mailman/listinfo/tacos"
target=_blank>https://lists.amrad.org/<U></U>mailman/listinfo/tacos</A><BR></DIV></DIV></BLOCKQUOTE></DIV>
<DIV> </DIV></DIV>
<P>
<HR>
_______________________________________________<BR>Tacos mailing
list<BR>Tacos@amrad.org<BR>https://lists.amrad.org/mailman/listinfo/tacos<BR></DIV></DIV></DIV></BODY></HTML>