[R-390] OT? Dimmer buzz, solution?

[Roy Morgan]

At 11:32 AM 7/1/2005, JMILLER1706 at cfl.rr.com wrote:
>Also check out this:
>http://www.ethanwiner.com/dimmers.html

which page includes the following:

"lthough many low-cost power outlet strips sold at hardware and computer 
stores claim to include RFI filtering, in truth none of them contain 
filters that are really effective. You need to purchase a genuine 
industrial-grade RFI filter from an electronics parts supplier. Both Mouser 
(mentioned above) and DigiKey (800-344-4539; on the Internet 
<http://www.digikey.com>http://www.digikey.com) sell the kind of filter I'm 
talking about here. I have used filters made by Corcom (sold by DigiKey) 
and Cornell-Dubilier with great success, and they range in price from $25 
to $65 each, depending on their capacity in Amperes. Don't waste your time 
with cheaper units; buy only Series R two-stage L-C (inductor-capacitor) 
filters. "

Roy



>----- Original Message -----
>From: Dave or Debbie Metz <dmetz at ntelos.net>
>Date: Friday, July 1, 2005 10:21 am
>Subject: [R-390] OT?  Dimmer buzz, solution?
>
> > While this is probably not within the parameters of heavy iron, I
> > do have a
> > question for the collective wisdom of this esteemed group. I have
> > been
> > haunted for years by lamp dimmer buzz radiated as RF that gets
> > picked up
> > with my basement hobby an the AM that the R-390 wants to hear.
> > Recently,
> > I purchased a Lutron Lamp Debuzzer Coil  LDC-10-TCP in another
> > attempt to
> > eliminate this radiated hash. Low and behold the $110 investment
> > worked
> > fantastically!  Now what I want to know is how to build such an
> > animal for
> > a lot less than $110!   All there is to this is a box about the
> > size of a
> > smaller ballast transformer with two wires. It goes in series
> > between the
> > dimmer and the light load. They have very specific amperage
> > ratings ,
> > 400-600 watts, 600-1200 watt, and 1200-1920 watts depending upon
> > the needed
> > load range.  It sure is great to now have the XYL upstairs
> > watching TV with
> > a dimmed light and I can listen to the DX BC band on the 390!
> > There has to
> > be a cheaper solution for the rest of my dimmed light circuits.
> > 73's
> > dave
> >
> >
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- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
7130 Panorama Drive, Derwood MD 20855
Home: 301-330-8828 Cell 301-928-7794
Work: Voice: 301-975-3254,  Fax: 301-948-6213
roy.morgan at nist.gov --