[RFI] RFI Digest, Vol 33, Issue 15
maxsoriano at gmail.com
Tue Sep 27 20:18:51 EDT 2005
So I wonder if the cause of the RFI is really the flourescent LIGHT (BULB)
itself OR maybe it's the electronic ballast? After all, the oscillator in
the controller circuitry must be in the 40 to 80kHz?????
Or maybe I am missing out on the discussions and perhaps that's really what
you guys have been referring to all this time (e-ballasts)....
But then again, one would think that for the newer flourescent bulbs they
make these days, they would have designed a better EMI filtering scheme to
get rid of the high switching frequencies (in the high 100kHz and more)of
the controller's internal oscillator?????
Take note of the many question marks I have....
On 9/28/05, rfi-request at contesting.com <rfi-request at contesting.com > wrote:
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> Today's Topics:
> 1. Re: Can Fluorescent bulbs cause RFI problems? (Mike Martin)
> 2. Re: frontload washer/dryer (John Gagen)
> 3. Re: Can Fluorescent bulbs cause RFI problems? (Michael Tope)
> Message: 1
> Date: Mon, 26 Sep 2005 14:07:41 -0400
> From: "Mike Martin" <mike at rfiservices.com>
> Subject: Re: [RFI] Can Fluorescent bulbs cause RFI problems?
> To: "'Scott Neader KA9FOX'" < ka9fox at qth.com>, <rfi at contesting.com>
> <20050926180744.IFDL14345.imta06a2.registeredsite.com at mikert6ke2sbbn>
> Content-Type: text/plain; charset="us-ascii"
> Hi Scott and all,
> Medium base fluorescent lights have come a long way over the past 15
> However beware. They may or may not cause you RI problems when new but may
> after aged. RFI is the lesser of the evils. The can activate remote
> devices such as ceiling fans, garage doors, TVs, lights and the list goes
> I've traveled from one end of the country to the other solving RI problems
> for power companies and now occasionally still find them to be the cause.
> This is an improvement from the past. There was a time when I was locating
> 5-6 per day to be the cause of power company complaints.
> The last time I checked, they were stating FCC compliance. On the inside
> flap of the box it reads "May cause Radio Frequency Interference". That's
> today's method of compliance.
> Michael C Martin
> RFI Services
> 6469 Old Solomon's Island Rd
> Tracey's Landing, MD 20779
> Tel 240-508-3760
> Nextel DC 164*21*29180
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> Please visit:
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> Message: 2
> Date: Mon, 26 Sep 2005 22:06:37 +0000
> From: John Gagen <w2yr at verizon.net >
> Subject: Re: [RFI] frontload washer/dryer
> To: rfi at contesting.com
> Message-ID: <433870ED.7090803 at verizon.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> Same situation here with my GE washer. It seems to be RF quiet!
> John - W2YR
> Jim Jarvis wrote:
> >I note that the list of manufacturers didn't include GE.
> >We've had a GE pair for maybe 7 or 8 years now. My station
> >has always been near the utility room where they were installed,
> >and for a time was IN it. Never noticed a problem with them
> >They were mid-range units, when we bought them.
> >jimjarvis at ieee.org
> >RFI mailing list
> >RFI at contesting.com
> Message: 3
> Date: Mon, 26 Sep 2005 23:43:26 -0700
> From: "Michael Tope" <W4EF at dellroy.com>
> Subject: Re: [RFI] Can Fluorescent bulbs cause RFI problems?
> To: <rfi at contesting.com>, "Scott Neader KA9FOX" <ka9fox at qth.com>
> Message-ID: <054f01c5c32e$c73be3b0$6401a8c0 at 1800xp >
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> ----- Original Message -----
> From: "Scott Neader KA9FOX" < ka9fox at qth.com>
> > Hey guys. I started getting on this kick of replacing our lights in the
> > house with Fluorescent equivalents, to obviously save money and do a
> > little
> > thing to conserve energy. I've replaced about 25 so far. They were the
> > 60w and 100w basic light bulb equivalents. I started looking into
> > replacements for some of our most used 65w and 75w floods & reflectors
> > the recessed cans around the house when... whoa, what am I
> > doing?!?!?! Could this be a potential RFI problem?
> > I searched the archives on this reflector, but not seeing much. Any
> > would be appreciate. I'll also try some tests with the existing bulbs
> > see what I can hear, if anything.
> > FYI, what got me going on this was that I seem to be seeing these things
> > everywhere I look. Home Depot sells a 6 pack of the 60w fluorescent
> > bulbs for $9.95 a pack, and I just picked up a 6 pack of 100w bulbs for
> > $15.50 at Sam's Club today. The draw to saving 75% of the electricity
> > costs and lasting 4-7 years is certainly interesting. I would think we'd
> > be seeing a lot of posts if these things were causing RFI problems...
> > maybe I'm the only ham to be dumb enough to bring them into the house?
> > - Scott KA9FOX
> I live on a small lot, so all of my antennas are very close to the house.
> have a number of compact fluorescents at very places in the house, I
> so far I haven't noticed them causing RFI on the HF bands. I can hear
> the ones in the hallway next to my shack on my AM radio in the garage,
> but it is very close to the hallway wiring. I don't hear that same noise
> when I listen on my 160 meter antenna which is about 20 feet in the
> other direction. Same story with the conventional fluorescent tubes
> lights in the garage (some noise on my AM receiver that sits right under
> them, but nothing to speak of on the outside antenna). As far as dimmers
> go, I had one in my old house that was noisy on 80 and 160. I replaced
> it with a Lutron which cleaned up the noise. I think the Lutron still
> put out some noise in the low medium wave range, however.
> I've had a few of the compact fluorescents fail prematurely, but not
> a significant number as of yet, so I guess there is still hope for a 6 to
> 7 year average life and the accompanying cost savings.
> 73 de Mike, W4EF..................................
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> End of RFI Digest, Vol 33, Issue 15
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