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@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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