[Elecraft] Filtering RFI from LED & fluorescence Dimmer Switches

Edward R Cole kl7uw at acsalaska.net
Tue Jan 26 04:13:23 EST 2016


We have no dimmers except the on/off dimmers called wall switches. ;-)

Re: LED's.  I have three CREE LED bulbs in my ham shack std ceiling 
light fixture with no RFI.  My wife is substituting out incandescent 
and bad CFL for LED's she found at Home Depot (not CREE - I think 
they are GE).  They also directly install in std light 
fixtures.  They are cylindrical in shape.  Also are not bothering the radios.

I have a desk fluorescent and garage has 30w tubes which do not seem 
to cause RFI.  The switching PS for our new Direct-TV satellite 
receiver throws out bad RFI on 2m.  Fortunately, I am usually in 
front of the TV most of the time it is on.  I will have to try 
clamp-on ferrites at some point.

I have a friend that acquired LED's from Costco and he is plagued 
with RFI from them (no idea of brand or model).  Definitely caveat 
emptor on converting to LED lighting if you are a ham.

73, Ed - KL7UW

From: Kevin Stover <kevin.stover at mediacombb.net>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Filtering RFI from LED & flouresence Dimmer
         Switches
Message-ID: <56A6CA47.7060900 at mediacombb.net>
Content-Type: text/plain; charset=windows-1252; format=flowed

My simple (=cheaper) solution is to get rid of the dimmers all together.
How much is a good old fashioned light switch at the big three, $1.50,
two buck if you want a matching switch plate.
When we bought our house I replaced six dimmers. Didn't hear a peep from
"she who must be obeyed".
I have about that many CFL's to swap out for LED's. The garage
fluorescents will be a different story. They get to stay as long as they
stay radio quiet.



73, Ed - KL7UW
http://www.kl7uw.com
     "Kits made by KL7UW"
Dubus Mag business:
     dubususa at gmail.com



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