[RFI] LED Bulbs

[Jim Brown]

That's exactly my point, Mike. Somewhere there is a dirty switcher, and 
the wires connected to it radiate.  Yes, please do list specific 
make/model numbers.

73, Jim K9YC

On 2/10/2014 11:36 AM, Mike Ryan 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
>> _______________________________________________
>> RFI mailing list
>> RFI at contesting.com
>> http://lists.contesting.com/mailman/listinfo/rfi
>>
>