Ie: [RFI] Ferrite Beads

[Cortland Richmond]

When I had to interview job applicants who claimed EMI experience, I liked to hand them a ferrite cylinder or clip-on and ask three questions:
1. What is it?
2. What does it do?
3. How?

Cortland
KA5S

-----Original Message-----
From: Jim Brown <jim at audiosystemsgroup.com>
Sent: Oct 22, 2004 11:27 AM
[snip]
You need to understand how ferrite materials work to solve interference problems. The 
Fair-Rite catalog does a very good job of explaining that. That's why you need to study 
it. The executive summary is that it turns the cable it is applied to into a series R and L, 
both of which vary with frequency. That R and L can help reject interference it they can ...