Info on RFI ferrite beads

I just got some of the RadioShack snap-on chokes.
Here is some interesting reading.

http://www.wr6wr.com/newSite/articles/columns/rfiandyou0598.html

This approach should be OK for common mode noise from 1-200 MHz
or so. But you need a lot of windings and a lot of chokes.
I imagine in some cases combining these with Stetzer filters
might be good, as the Stetzers only get the differential mode.
Ferrites can address differential mode if you have separate
cores for the hot and neutral, but then you may also create
a magnetic field locally.

Bill


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In a message dated 4/5/2009 10:45:56 P.M. GMT Daylight Time,
[hidden email] writes:

I just got some of the RadioShack snap-on chokes.
Here is some interesting reading.




what about digging up the electric cable to the house and fitting a massiive
choke to it ?


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If you're going to go through that trouble, you should get a multi-stage
filter, and have it far from the house.
Bill

On Sun, Apr 5, 2009 at 4:23 PM, <[hidden email]> wrote:


[Non-text portions of this message have been removed]

In a message dated 4/6/2009 2:39:29 A.M. GMT Daylight Time, [hidden email]
writes:

If you're going to go through that trouble, you should get a multi-stage
filter, and have it far from the house.
Bill



where can I get one of these beauties ! - cheers Bill - Paul UK


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