[RFI] Can Fluorescent bulbs cause RFI problems?

dj dj2001 at mn.rr.com
Mon Sep 26 05:18:08 EDT 2005

I've had one of those replacement fluorescents on 24/7 for years and  
never a peep.  It's in the basement directly under my shack.  I think  
it's a 15 watt with the light of a 40 or 50 watt regular bulb.

I do have a couple of shop lights, (4 foot) which are terrible noise  
makers until I changed the tubes.  My next door neighbor has one also  
and when it's on it puts out S-9 noise.  I bought a MFJ 1026 which  
takes it out completely.  The NB does the job too but distorts the  
audio of the station I'm trying to copy.  The dimmer lights are  
awful, I had one and I not only received noise from it I caused it to  
turn on when transmitting.  I partly cured it with a RF choke and a  
resistor, but not completely.  It's unplugged and not in use anymore.


On 25, Sep 2005, at 22:31, Scott Neader KA9FOX wrote:

> 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 in
> 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 input
> would be appreciate.  I'll also try some tests with the existing  
> bulbs and
> 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 light
> 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... but
> maybe I'm the only ham to be dumb enough to bring them into the house?
> - Scott KA9FOX
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