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Re: [TowerTalk] [TVI-RFI-EMI] Re: Query RFI

To: "Bob Maser" <bmaser@tampabay.rr.com>,"Kirk" <kirk.harding@cox.net>, <nz3o@arrl.net>
Subject: Re: [TowerTalk] [TVI-RFI-EMI] Re: Query RFI
From: Jim Lux <jimlux@earthlink.net>
Date: Sun, 19 Nov 2006 11:13:15 -0800
List-post: <mailto:towertalk@contesting.com>
Lots of comments below on dimmers and noise presence or lack thereof.

There are different models of dimmers from the same company, and even 
the same model might have design changes over time.  Some of those 
design changes may be to fix RFI problems.

Lutron is a reputable mfr, and dimmers are basically their 
specialty.  They must have hundreds of different configurations for 
all sorts of applications, including those in RFI sensitive 
environments.  A call to their applications engineers might be 
useful.  You might need to call a distributor and have them make the contact.

It's entirely possible (nay, likely) that if you whip on down to the 
Lowes Depot Mart and buy the "selected for cost sensitive 
applications" manufacturers and models on offer, that they won't have 
good RFI properties.

I've noticed a similar thing with compact fluorescent lights.

Jim, W6RMK


At 07:10 AM 11/19/2006, Bob Maser wrote:

>I have them in my 2300 SF home and they make noise.  Must be my home is not
>big enough here in Florida.  I had them in my 4500 SF CA home and they were
>also quiet.
>
>Bob W6TR
>
> > When I had this home built I raised the question about the use of light
> > dimmers.  The electrician told me that Lutron were the best and I would
> > not
> > have any noise generation problems. So that was what I had him install.  I
> > have dimmers in all rooms of a 3700 SF home.  These are hard wired (3 and
> > 4
> > 2 wire) not wireless.  I have never heard a pip out of any of them.
> >
> > Kirk, K6KAR
> > Niceville, FL

 >
> > Didn't see the initial note, but have dimmers in several dozen
> > fixture controls here and RFI on HF is zero.  Key is using quality
> > products and having three-wire switches, not two wire.
> >
> > I have 60 Lutron RadoRa wireless dimmer circuits and
> > have had zero problems in either direction since moving
> > from two-wire units to three-wire units.
> >


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