[Elecraft] FCC rules part 18

[Frank Van Cleef W1WCG]

Lenny,

I have more than 20 CF lamps ranging from 13w to 42w
and from several different manufacturers in my house,
and have never heard anything I could identify as noise from the devices,
with one exception:  one of the oldest lamps, a 13w model that was used
to light the stairwell down to the basement, caused an AC hash-type noise
on my Yaesu FT1000MP at about S2.  It was not very loud, but enough
to bother me while I was on a net on 7.2Mhz.  This lamp was about 20
feet from the radio, and more than 50 feet from the antenna which is a
B&W loop fed with coax.  Otherwise, I've never had noise problems
either from the CF lamps or the 40w flourescent tubes which light
the basement.

In particular, I have five 19w lamps that light my study area (where the
K2 is used on a CW net every morning), and have absolutely no
problem with them.  Any noise created is below the normal 40/80m
noise levels.

So, though the potential is there, I think the manufacturers have done a
pretty good job of designing tiny switching supplies that are reasonably
quiet for these lamps.

I'll be interested to see what anybody else has to say on the subject...

73, Van W1WCG

----- Original Message ----- 
From: "w2bvh" <w2bvh at comcast.net>
To: <Elecraft at mailman.qth.net>
Sent: Saturday, April 14, 2007 8:19 PM
Subject: [Elecraft] FCC rules part 18


>I just got back from the home center. While there I looked at the 
>instructions for a 42 watt (150 watt equivalent) helical compact 
>fluorescent (the kind that screws in as a replacement for a regular bulb).
>
> The instructions said that it complies with fcc rules part 18. If it 
> causes radio interference it should be moved or the radio should be moved. 
> That there may be radiation in the 0.5-30MHz range. And that it should not 
> be used in proximity to marine radio equipment.
>
> So my question is: is the sky falling, or is this a non-issue?
>
> 73,
> Lenny W2BVH
>
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