Topband: Home Depot LED bulb interference.

[Garry Shapiro]

It is quite possible that the products--while claimed to meet Part 
15--actually do not, either on some lots or all of them. The real 
question is whether anyone checks after the original determination.

Garry, NI6T

On 4/5/2012 6:07 PM, Jim F. wrote:
> Hi George,
>   
> I first noticed the problem as a hiss on my favorite FM radio station.
>
>   
> Tod, K0TO had a very good thought, that it may be the dimmable feature.
>   
> To answer your question  George, : Yes... Marked Clearly on the box.
>
>
>> I am wondering the if the LED
>> bulbs bought from Home Depot meet FCC Part 15 specs. Were
>> they marked so?
>> George, AA7JV
>   
> jim / W1FMR
>
>
> --- On Thu, 4/5/12, GeorgeWallner<aa7jv at atlanticbb.net>  wrote:
>
>
> From: GeorgeWallner<aa7jv at atlanticbb.net>
> Subject: Re: Topband: Home Depot LED bulb interference.
> To: "TOPBAND"<TOPBAND at CONTESTING.COM>
> Date: Thursday, April 5, 2012, 7:10 PM
>
>
> On Thu, 5 Apr 2012 16:01:12 -0400
>    "Mike Greenway"<K4PI at BELLSOUTH.NET>  wrote:
>> I wondered how long it would take before they started
>> selling some RFI
>> generating lighting.  Soon we can have a complete
>> neighborhood of RFI
> I have tested compact fluorescent bulbs a couple of years
> ago and found that they were noisy. I have not tried to
> quantify the level of noise emitted, but it was about S5
> on my K3 at a distance of about 4 feet using a one foot
> wire for antenna. I have stayed with incandescent, but my
> neighbor has installed over 50 of them on his house. The
> noise coming from that direction (NW) is significantly
> stronger than what I get from any other direction. Since
> he has installed the CF (and many LED) bulbs, I have not
> made one JA QSO! Fortunately, my DHDL, which looks towards
> EU (NE) completely blocks the noise and I am still able to
> work Europe.
>
> On the other hand, I have LED lights installed on my dock,
> which is only about 20 feet to the East of the RX antenna,
> but these LED lights are driven by well filtered drivers
> in metal boxes. No noise from these lights can be
> detected.
>
> It seems to me that we have a very serious threat from
> noisy "switched" light sources (and other digital noise
> generators, like Variable Frequency Drives) that have not
> been properly filtered. I am wondering the if the LED
> bulbs bought from Home Depot meet FCC Part 15 specs. Were
> they marked so?
>
> George, AA7JV
>
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