[RFI] LED Bulbs

[Jim Brown]

Did you miss my observation that it is the switching power supplies for 
the LEDs that are the producing the noise?  They are built into the base 
of each LED lamp. Think about it -- LEDs operate on a few volts DC, but 
they are connected to a 120VAC outlet.

73, Jim K9YC

  On 2/10/2014 10:48 AM, David C. Hallam wrote:
> 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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>