- 1. [RFI] Ferrite Beads from DX Engineering (score: 1)
- Author: "David Jordan" <wa3gin@comcast.net>
- Date: Mon, 11 Jan 2010 14:08:29 -0500
- Hi Folks, I saw this statement on the DX Engineering web site: "These Ferrite beads, when placed around a current carrying conductor, act as an RF choke. They offer a convenient, inexpensive, yet a v
- /archives//html/RFI/2010-01/msg00018.html (7,867 bytes)
- 2. Re: [RFI] Ferrite Beads from DX Engineering (score: 1)
- Author: "Jim Brown" <jim@audiosystemsgroup.com>
- Date: Mon, 11 Jan 2010 11:36:34 -0800
- DXE is only partially correct here. Ferrites add a parallel resonant circuit in series with whatever wire/cable passes through/around them. The NATURAL resonant frequency of most single beads or clam
- /archives//html/RFI/2010-01/msg00019.html (9,557 bytes)
- 3. Re: [RFI] Ferrite Beads from DX Engineering (score: 1)
- Author: "Jim Brown" <jim@audiosystemsgroup.com>
- Date: Mon, 11 Jan 2010 13:23:21 -0800
- 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
- /archives//html/RFI/2010-01/msg00021.html (7,848 bytes)
- 4. Re: [RFI] Ferrite Beads from DX Engineering (score: 1)
- Author: Peter Laws <plaws0@gmail.com>
- Date: Mon, 11 Jan 2010 16:45:22 -0600
- Really? 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
- /archives//html/RFI/2010-01/msg00024.html (8,382 bytes)
- 5. Re: [RFI] Ferrite Beads from DX Engineering (score: 1)
- Author: "WA3GIN" <wa3gin@comcast.net>
- Date: Mon, 11 Jan 2010 17:53:23 -0500
- Peter, If I win the lotto I'll buy new spark wires and install 15 beads each and report the results ;-) 73, dave wa3gin -- Original Message -- From: "Peter Laws" <plaws0@gmail.com> To: <rfi@contestin
- /archives//html/RFI/2010-01/msg00025.html (9,363 bytes)
- 6. Re: [RFI] Ferrite Beads from DX Engineering (score: 1)
- Author: "Jim Brown" <jim@audiosystemsgroup.com>
- Date: Mon, 11 Jan 2010 15:10:46 -0800
- I can't comment on the automotive aspect of the design problem, but the electronics and EMC part is solid and well known. That's hard to predict. It will certainly vary with the plug circuitry and th
- /archives//html/RFI/2010-01/msg00028.html (9,399 bytes)
- 7. Re: [RFI] Ferrite Beads from DX Engineering (score: 1)
- Author: dgsvetan@rockwellcollins.com
- Date: Mon, 11 Jan 2010 17:18:29 -0600
- Dave, I would say that the recommendation given to you was, in fact, a pretty good starting point. After all, when you consider the nature of the ignition system waveform, and the fact that in many v
- /archives//html/RFI/2010-01/msg00029.html (11,876 bytes)
- 8. Re: [RFI] Ferrite Beads from DX Engineering (score: 1)
- Author: Tree <tree@kkn.net>
- Date: Mon, 11 Jan 2010 15:18:51 -0800
- I have also used some ferrite and caps to slow down the edges from an electric fence charger. I have found that one popular brand has sharp enough edges that it causes some RFI even if there is noth
- /archives//html/RFI/2010-01/msg00030.html (8,454 bytes)
- 9. Re: [RFI] Ferrite Beads from DX Engineering (score: 1)
- Author: "WA3GIN" <wa3gin@comcast.net>
- Date: Mon, 11 Jan 2010 18:25:20 -0500
- The Ford doesn't use independent iginiters...it is a six with old fashioned spark plugs and wires... I wish it weren't so because I believe suppressing RF on the primary would be a much easier task.
- /archives//html/RFI/2010-01/msg00032.html (13,553 bytes)
- 10. Re: [RFI] Ferrite Beads from DX Engineering (score: 1)
- Author: myles landstein <myles.landstein@gmail.com>
- Date: Mon, 11 Jan 2010 19:17:32 -0500
- nearly all auto manuf. have guide sheets specifically detailing what they recommend to mitigate noise also there are many 3rd party parts specifically designed to suppress auto noise from typical sou
- /archives//html/RFI/2010-01/msg00036.html (11,637 bytes)
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