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Re: [RFI] Ferrite Beads from DX Engineering

To: rfi@contesting.com
Subject: Re: [RFI] Ferrite Beads from DX Engineering
From: Peter Laws <plaws0@gmail.com>
Date: Mon, 11 Jan 2010 16:45:22 -0600
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
On Mon, Jan 11, 2010 at 15:23, Jim Brown <jim@audiosystemsgroup.com> wrote:

> Ferrite beads in pulsed circuits (like  spark plug wires) would work
> slightly differently. There, they work by slowing down the rise/fall
> time of the current pulse (or smoothing its corners), which in turn
> reduces the strength of harmonics. It's those harmonics that we hear


Well, I mean not "really" as in "you don't know what you're talking
about" but as in "wow, the SAE types spend a lot of time getting those
rise-fall times just right so that the car meets the applicable
standards for fuel consumption and emissions" ...  Although not
mandated, there are also drivability concerns as well ...

Just how much would chokes change that?  And how does this compare to
the old "resistor plugs" that were sold to make the ticking on the car
radio go away?

Peter Laws | N5UWY | plaws plaws net | Travel by Train!
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