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@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@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@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@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@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@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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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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