[TVI-RFI-EMI] ferrite beads

Fri, 14 Jun 2002 19:36:38 -0400

RF ground will conduct RF with or w/o ferrites.  If there is a high
impedance at a particular frequency it WILL radiated as common mode RF. The
ferrites will absorb that RF.

Dennis WA1HOG

----- Original Message -----
From: "Ed Tanton" <[email protected]>
To: "FireBrick" <[email protected]>; "tvi-rfi List"
<[email protected]>
Sent: Friday, June 14, 2002 6:58 PM
Subject: Re: [TVI-RFI-EMI] ferrite beads

> Hi Bill... you WANT the grounds to conduct RF... separate ground wires
that
> is... I usually do both ends of a cable I don't want any trouble from (so
> to speak) but I would think the main thing is to block the entrance of RF
*
> INTO * an INPUT; and the exit of RFI from anything that could be a source.
> For example, I had a monitor giving me problems until I beaded (actually I
> used clamp-on ferrite chokes) both ends of the monitor cable; and the
> monitor and the cpu AC lines. This was a PC XT in the days before they put
> a nice chunky bead at the output of the monitor. Worst case I ever cured
> required multiple turns on a T-200 core.
>
>
> 73 Ed Tanton N4XY <[email protected]>
>
> Ed Tanton N4XY
> 189 Pioneer Trail
> Marietta, GA 30068-3466
>
> website: http://www.n4xy.com
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