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Re: [RFI] compact fluorescent bulbs

To: Charles Coldwell <coldwell@gmail.com>
Subject: Re: [RFI] compact fluorescent bulbs
From: Dale Johnson <dj2001x@comcast.net>
Date: Mon, 16 Dec 2019 05:24:42 -0600
List-post: <mailto:rfi@contesting.com>
I have never had RFI issues with CFL’s or LED light bulbs, except as noted 
below, in fact I use two in the shack for lighting the desk.  I have had 
failures though.  They both get pretty hot at the base to the point the plastic 
gets brown and eventually the glass loosens up.  I just had a LED failure a 
couple weeks ago, it started to flicker and the base was loose, that bulb was 
only about a year old.  

The CFL’s don’t work very well in our cold winters, I tried them out in the 
garage and they didn’t come on in the cold.  On the other hand I have LED shop 
lights and they work in the cold, just don’t daisy chain them because then they 
really put out RF noise.  By that I mean plug one shop light into another.  I 
plug each one into separate outlets.  

Dale, K9VUJ

On 16, Dec 2019, at 4:02, Charles Coldwell <coldwell@gmail.com> wrote:

I bought a pair of compact fluorescent bulbs at a big box retailer (*)
and when I opened the box, a slip of paper with this note on it fell

"This device complies with Part 18 of the FCC Rules. If interference
occurs move this product away from the device or plug into a different
outlet. This product may cause interference to radio equipment and
should not be installed near maritime safety communications equipment
or other critical navigation or communication equipment operating
between 0.45-30 MHz. Any changes or modifications not expressly
approved by the manufacturer could void the user's authority to
operate the equipment. Feit Electric Company, 4901 Gregg Road, Pico
Rivera, California 90660 www.Feit.com."

These I bought for a garage door opener (**), and in the directions
for the opener it says

"STEP 6 Install the Light Bulbs .... NOTE: Do not use halogen, short
neck, or specialty light bulbs as these may overheat the end panel or
light socket. Do not use LED bulbs as they may reduce the range or
performance of your remote controls."

Light bulbs!


(**)  https://www.chamberlain.com/this-product-has-been-discontinued/p/B510.
Discontinued; I wonder why.

Charles M. Coldwell, W1CMC
Belmont, Massachusetts, New England
"Turn on, log in, tune out"
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