[RFI] LED Bulbs

Dale J. dj2001x at comcast.net
Mon Feb 10 21:44:32 EST 2014 

Some of these products are sold under different names.  Very frustrating.  What's more frustrating is we don't have any protection from this junk.    

Dale, K9VUJ


On 10, Feb 2014, at 20:06, Gary K9GS <garyk9gs at wi.rr.com> wrote:

> If we're going to start naming names it would be very helpful to list the store where purchased, the brand, and the EXACT model number.  Nothing is more frustrating than walking into a store, knowing brand-x is no good and then seeing 10 different models by the same manufacturer on the shelf.
> 
> Also..one technical detail.  The RFI isn't from the LED.  It's from the power supply used to drive the LED(s) in the fixture.  For most lighting manufacturers the LED cost is fixed.  To be able to hit a retail price point that leaves the fixture itself and the power supply (also called a driver).
> 
> Corners are often cut in the power supply to drive down cost.
> 
> 
> On 2/10/2014 5:44 PM, Dale J. wrote:
>> Mike, I just got a reply from my contact at Menards.  He said that he's not seen this item at Menards.  Understand, it's a Lowes name brand.  It is possible this device is offered under many name brands.  We need to get the word out, watch out for this junk. I don't trust any of it unless I test it in my house.  The CFL bulbs have shown to be RFI ok here, I have them all over the house including two in my shack, they are quiet.  I have not tried any LED type lighting, but I know a ham who has some LED string lighting over his ham desk and says it's quiet, so all over the ball park with this stuff.
>> 
>> Thanks Mike
>> 
>> 73
>> Dale, K9VUJ
>> 
>> 
>> 
>> On 10, Feb 2014, at 16:40, Mike Ryan <mryan001 at tampabay.rr.com> wrote:
>> 
>>> Dale, I think PORTFOLIO is Lowes brand.  The other stores may and most likely do have the same or similar product but under another name.  -Mike
>>> 
>>> -----Original Message----- From: Dale J.
>>> Sent: Monday, February 10, 2014 4:40 PM
>>> To: Mike Ryan
>>> Cc: rfi at contesting.com
>>> Subject: Re: [RFI] LED Bulbs
>>> 
>>> Noted.  I don't have a Lowes close by, but I do have a Home Depot and Menards.  Next time I'm there I will look for this product and perhaps drop some suggestions. I do know someone who works in the electrical department at Menards, he's a ham operator too.  I'll pass this information along to him, minus all the headers etc.
>>> 
>>> Thanks Mike.
>>> 
>>> 73
>>> Dale, K9VUJ
>>> 
>>> 
>>> 
>>> On 10, Feb 2014, at 15:25, "Mike Ryan" <mryan001 at tampabay.rr.com> wrote:
>>> 
>>>> Dale, The brand name is PORTFOLIO, and sold around here at LOWES.   The model number is #0068062.  It is called a 'wall wash light'.  They are LED, low voltage 8w draw, with 420 lumens / 3000k.  The box says they are comparable to a 35w halogen floodlight.  Very, Very, nasty light fixture.
>>>> -Mike
>>>> 
>>>> -----Original Message----- From: Dale J.
>>>> Sent: Monday, February 10, 2014 3:06 PM
>>>> To: Mike Ryan
>>>> Cc: rfi at contesting.com
>>>> Subject: Re: [RFI] LED Bulbs
>>>> 
>>>> I'd like to get the numbers of those lights.  Post them if you will, mfg too and where they are sold.
>>>> 
>>>> Tnx
>>>> Dale, k9vuj
>>>> 
>>>> 
>>>> 
>>>> On 10, Feb 2014, at 13:36, Mike Ryan <mryan001 at tampabay.rr.com> wrote:
>>>> 
>>>>> Sorry Jim but the power supplies that these lights are connected to are not always the case. I mentioned in an earlier post here about some 50w LED lamps which use 12 vot AC, that's AC. The power supply is clean.  The BULBS have switching power supplies of some nature in them.  LOEWS has a line of exterior landscaping lights which will pretty much drive you QRT. My neighbor has 10 of these in his yard.  They are dirty from HF to at least 440mhz.  When his outdoor lights timer goes ON, I am OFF. I'd be happy to post info on these again should someone care.  - Mike
>>>>> 
>>>>> -----Original Message----- From: David C. Hallam
>>>>> Sent: Monday, February 10, 2014 1:48 PM
>>>>> To: rfi at contesting.com
>>>>> Subject: Re: [RFI] LED Bulbs
>>>>> 
>>>>> I may have made an unwarranted conclusion, but I assumed the LED were
>>>>> substituted for halogen without any other changes.  I will see if I can
>>>>> get a clarification on that point.  Would a change in bulb types make
>>>>> any difference in the RFI being generated?
>>>>> 
>>>>> David
>>>>> KW4DH
>>>>> 
>>>>> On 2/10/2014 1:14 PM, Jim Brown wrote:
>>>>>> On 2/10/2014 11:07 AM, Dave Cole wrote:
>>>>>>> Who would have thought the LED's could radiate so far?
>>>>>> It's not the LEDs, it's the wires (antennas) connected to the switching power supply for the LEDs. This should come as no surprise to any ham --  switching power supplies are generators of RF trash, that puts RF current on those wires, and like any other antenna, those wires radiate the trash.
>>>>>> 
>>>>>> Thank you VERY much for posting details of part numbers and vendors for the bad products.
>>>>>> 
>>>>>> 73, Jim K9YC
>>>>>> _______________________________________________
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>>>>>> RFI at contesting.com
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>>>>>> 
>>>>> -- 
>>>>> "I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them."
>>>>> Thomas Jefferson
>>>>> 
>>>>> 
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> 
> -- 
> 
> 
> 73,
> 
> Gary K9GS
> 
> Greater Milwaukee DX Association: http://www.gmdxa.org
> Society of Midwest Contesters: http://www.w9smc.com
> CW Ops #1032   http://www.cwops.org
> 
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