Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

donate to eham
   Home   Help Search  
Pages: [1]   Go Down
  Print  
Author Topic: Outdoor LED Lighting RFI  (Read 1100 times)
KL0S
Member

Posts: 140




Ignore
« on: November 03, 2017, 07:31:03 PM »

My neighbor recently installed four 80W outdoor LED light fixtures manufactured by "Bobcat Lighting" which are about 125' away from my SteppIR BigIR vertical and when on simply tear up the HF bands with at least a +10 signal. He has been very cooperative and helped confirm that they in fact are the culprit by switching off each circuit at his panel while I monitored for the noise. Fortunately he only uses the lights for a short time when he's out taking care of his farm animals.

Bobcat Lighting is a U.S. company and I contacted them and provided my experience. One of the managing partners told me that his engineers guaranteed that their units meet FCC EMI standards but offered to have the lights tested if my neighbor would remove and ship them to him. Of course my neighbor needs his lighting...I've offered to purchase four new lights and have them installed -- but I have to find the most RF quiet outdoor LED fixtures to do so.

Does anyone have any suggestions for a manufacturer who makes RF quiet units?

Thanks in advance!

73 - Dino KL0S
Logged
ZENKI
Member

Posts: 1421




Ignore
« Reply #1 on: November 04, 2017, 01:37:44 AM »

I would suggest you try a few of these.

https://www.ledvance.com

This company is owned by OSRAM.  I have tested their LED Floodlights upto 50 watts. Very bright and QRM free when installed in my neighbors  house to replace the Ebay LED floodlight jammers. In fact most of the so called name brand LED floodlights cause horrendous  QRM. Its not the LED lights but the power supply drivers that are cheap Chinese junk with fake EMC and Standards markings.

The LEDVANCE lights have been the lowest QRM  LED LIGHTS that I have come across when installed away from my station. When installed in my station i detected minor noise on 18mhz that could be easily killed with a ferrite choke.

I measured these lights using a LISN and they are clean. I can only vouch for the 20 and 50 watt units.
Logged
N6PJB
Member

Posts: 59




Ignore
« Reply #2 on: November 04, 2017, 09:31:01 PM »

Stay away from Ledmo LED fixtures as they also produce too much EMI.
Logged
NK7Z
Member

Posts: 1831


WWW

Ignore
« Reply #3 on: November 05, 2017, 05:45:50 AM »

Remember, what was true yesterday, may not be true today...  Manufacturers tend to source parts and PC boards from various other folks all the time, and the sources change...  Changed sources can equal RFI on what was an otherwise RFI quiet device.  Buy what you think best, buy it with the ability to return it if it generates RFI, then test it.  That is your ONLY way to insure you get an RFI free device. 

BTW, The FCC specs say that a lighting device can't interfere with your licensed use of the radio.  See:

https://www.ecfr.gov/cgi-bin/text-idx?SID=833fffb55cebfced8d061b986f371e7f&mc=true&node=se47.1.15_15&rgn=div8

and

https://www.ecfr.gov/cgi-bin/text-idx?SID=833fffb55cebfced8d061b986f371e7f&mc=true&node=se47.1.15_115&rgn=div8

So in your next discussion with the company making the device, and if you feel the need, you now can point out that the device is not in compliance with part 15 when used, if it is harming your use of the spectrum.
Logged

Thanks,
Dave
For reviews and setups see: http://www.nk7z.net
N1LO
Member

Posts: 1101


WWW

Ignore
« Reply #4 on: November 06, 2017, 05:54:19 AM »

Hi Dino.
 It sure sounds like you got a brush off from the Bobcat company. Maybe you could just send one of the lights back for testing. Perhaps a short video using a baby monitor set at the shack and including a view of the LED light switching on with you holding the baby monitor receiver showing how the noise instantly comes up.

It might even be worth trying to place a field strength meter next to the LED fixture or wire and switching it on and seeing if you measure stray RF radiating off the AC line or device. Send a video of that to the manufacturer and there is no doubt.

So frustrating to see common consumer electronics destroy our Hobby.
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!