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Re: [RFI] LED Bulbs

To: "rfi@contesting.com List" <rfi@contesting.com>
Subject: Re: [RFI] LED Bulbs
From: Tom Thompson <tlthompson@qwest.net>
Date: Wed, 12 Feb 2014 10:03:27 -0700
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
By the way, the power company was prompt in fixing the insulator causing the RFI.
Tom


On 2/12/2014 9:57 AM, Tom Thompson wrote:
This has been my experience here in Boulder, CO. In the past several years I have dealt with 3 halogen light power supplies, 9 grow light power supplies, one power line insulator, and one video camera power supply.
I was able to talk one neighbor into replacing his 12 volt halogen 
system with a 120 volt system which solved the problem.
I replaced the switching supply on another halogen system with a 
transformer and solved that problem.
The third halogen system was a desk lamp and I placed a common mode 
choke on the lamp leads and solved that problem.
A grower loaned me his kilowatt ballast and I was able to develop a 
lamp side filter that reduced the RFI by 30-dB.  I applied that to 
five grow light systems and reduced the RFI to an acceptable level at 
my house.  The other four growers moved away.
The video camera power supply RFI was reduced to an acceptable level 
with a common mode choke.
I built a LISN and determined that the grow light ballasts were 
violating part 18b specifications by 40-dB.  I shared this technical 
information as well as the names of grow light ballast retailers and 
one ballast importer with the FCC Denver office to no avail.  I had a 
two hour meeting with the engineers at the Denver office.  Whereas 
they were sympathetic, nothing has happened from their office.  One 
interesting point was that the meeting was ended because they had to 
track down a pirate radio station.  We pointed out the irony of the 
concern for 10 kHz of the broadcast spectrum over concern of many kHz 
of the HF spectrum.
I, also, spoke with Laura Smith in the enforcement division.  She said 
they were looking into tracking down some of the grow light ballast 
importers, but I don't think that is happening yet.
I think the bottom line is that the FCC is under funded and under 
staffed and we amateurs are a low priority.  Maybe a concerted letter 
writing to our congressional representatives is in order.
Tom   W0IVJ

On 2/12/2014 8:39 AM, Kimberly Elmore wrote:
If no one complains, it's a sure bet nothing good will ever happen. Are we at the top of the FCC's interest list? No, nor have we ever been. Yet, if we don't squawk, who will? We need to log the problems with the FCC and with the ARRL, who (like it or not) has a fair bit more clout with the FCC than any one of us singly.
My experience with the FCC field offices has always been good. If 
there's a problem, call the closest office and ask to speak to a 
field engineer. These guys are pretty bright and understand what we do.
I honestly don't understand the attitude of  "It's hopeless so don't 
bother." That's a self-fulfilling prophecy if ever there was one.
Kim N5OP


________________________________
  From: Dale J. <dj2001x@comcast.net>
To: Roger D Johnson <n1rj@roadrunner.com>
Cc: "rfi@contesting.com List" <rfi@contesting.com>
Sent: Wednesday, February 12, 2014 9:25 AM
Subject: Re: [RFI] LED Bulbs

Hi Roger,

Now that statement I'll agree with.  I will too.

Even if I were to call the FCC to complain would I talk to a live human who knows what I'm talking about or would it be a robot that directs me to a FAQ on how to deal with RFI.
73
Dale, K9vuj


On 12, Feb 2014, at 8:12, Roger D Johnson <n1rj@roadrunner.com> wrote:

Unfortunately, interference to amateur radio appears to be VERY low
on the FCC priorities list. I'll probably be an SK long before they
act on my complaint!

73, Roger

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