[RFI] update <was> 40m (and other) noise

Eric - VE3GSI ve3gsi at sympatico.ca
Sat Apr 11 14:44:22 PDT 2009

Like Jim I have also had some noticeable success with small plug-in power
filter cubes for noisy 'junk' around the house. The ones I use are by Belkin
called and 'Surge Master' available at Home Depot here in Canada. At the
time I bought them they were the only filters with a RFI rating on the
package. Also when I bought mine there were two models (1 & 6 circuit cubes)
with the RFI rated about 40 db at 100 Mhz. To be honest I have not seen
these little cubes in the hardware section as of late, nor have I been
looking, so I'm not sure if they are still carried by stores up in this neck
of the woods.

To be clear, the filter/surge protectors I am talking about are CUBES and
not power bars. Do check the store packaging as there are different ratings
with each model of filter.

73 Eric - VE3GSI

> -----Original Message-----
> From: im Brown
> Sent: April-11-09 4:28 PM
> To: rfi at contesting.com
> Subject: Re: [RFI] update <was> 40m (and other) noise
> On Sat, 11 Apr 2009 14:02:55 -0500, Sam Morgan wrote:
> >snapon toroid did *NOT* fix it,
> Of course not. No reason why it should. For 30M, a multi-
> turn choke on #31 or #43 material is needed. Study
> http://audiosystemsgroup.com/RFI-Ham.pdf
> Over the past few months, I've been gradually adding power
> line filters to nearly everyting that's plugged in to the
> power line, and my noise level has been gradually dropping.
> Power line filters are widely available, sometimes on the
> surplus market for only a few bucks. Check out
> http://audiosystemsgroup.com/PowerFilters.pdf
> 73,
> Jim Brown K9YC

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