Henry Ott Consultants

Electromagnetic Compatibility Consulting and Training

EMC News

May 25, 2016

New MIL-STD-461G

On December 11, 2015 the Department of Defense released a new MIL-STD-461G.

The revised standard includes two additional susceptibility requirements. CS117 for lightning-induced transients on cables and power leads, and CS118 for personnel-borne electrostatic discharge. CS106 (conducted susceptibility, transients, power leads) had been deleted, presumably replaced by CS117. In addition, technical updates have been added to RE102 (Radiated Emission, Electric Fields) and RS103 (Radiated Susceptibility, Electric Fields).

A copy of the standard (dated 12/11/15) is available at http://quicksearch.dla.mil/Transient/39694326ABA3451E9EA9335D190480B1.pdf

April 3, 2014

New EMC Directive Published

On March 29, 2014 the European Parliament published a new updated version of the EMC directive in the Official Journal of the European Union. Click here for more detailed information.

March 12, 2014

Ferrite Cores for Low-Frequency EMI Cable Suppression

It is common to use ferrite cores on cables to reduce high-frequency (> 10 MHz) emissions and/or susceptibility. For low-frequency (< 10 MHz) emission/susceptibility problems, however, ferrite cores have not been very useful, since their impedance is too low to be effective at these frequencies.

Recently Fair-Rite Products Corp. has introduced a new low-frequency Type 75 ferrite material optimized for EMI suppression in the 200 kHz to 30 MHz frequency range. These ferrite cores have an impedance peak in the 1 to 2 MHz range. For more information on these low-frequency suppression cores see my recent blog or download Fair-Rite’s Low-frequency Suppression Flyer.


Dave Jones and Chris Gammell of The Amp Hour podcast interview Henry Ott  on 9/30/13. (broadcast on 10/1/13, ≈105 minutes)

EMC Icon Passes Away

On June 27, 2012 Dr. Clayton R. Paul passed away. This is a great loss, he will be sorely missed by the many of us who knew him. Read my Tribute to Clayton.

Portable Electronic Devices on Aircraft

Why do you have to turn off your portable electronics devices on an airplane during takeoff and landing? Check out this video by Boeing to find out:


Henry Ott is Featured Engineer on EEWeb

Check out the EEWeb Featured Engineer interview with Henry Ott at  http://www.eeweb.com/spotlight/interview-with-henry-w.-ott

New EMC Book

"Electromagnetic Compatibility Engineering" by Henry W. Ott has just been published (August 2009) by John Wiley & Sons. A new book from the author of the very popular book "Noise Reduction Techniques in Electronic Systems, Second Edition."

ISBN#: 978-0-470-18930-0

Hardcover, 872 pages, 566 figures.

EMC Book Receives Scholarly Publishing Award

From: Interference Technology eNews, March 4, 2010

“Electromagnetic Compatibility Engineering,” written by Henry Ott and published by John Wiley & Sons Inc., received a PROSE Award for 2009 in the subject of Engineering & Technology. The PROSE Awards annually recognize the best in professional and scholarly publishing by bringing attention to distinguished books, journals, and electronic content in over 40 categories. The awards have been judged by peer publishers, librarians, and medical professionals since 1976.

European Union EMC

New EMC Directive (2004/108/EC)

A new updated version of the fifteen year old EMC Directive (89/336/EEC) was published in the  Official Journal of the European Communities on December 31, 2004 as Directive 2004/108/EC.  The new directives protection requirements  remain essentially the same, however, most other aspects of the directive have been completely rewritten.  See EMC Regulations for more information.

Revised EMC Directive Standards List

An updated list of harmonized standards under  the new EMC directive 2004/108/EC (previously 89/336/EMC) along with their effective dates was published in the Official Journal the European Communities (OJ) on October 23 2012.  The list replaces all previous  lists  published in the OJ.  The list is available at: http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:C:2012:321:0001:0020:EN:PDF

IEEE EMC Society LogoLocation of Future IEEE EMC Society Sponsored Symposia

2019: New Orleans, LA,
July 22-26, 2019

2020: Reno, NV, July 27-31, 2020

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Henry Ott Consultants
48 Baker Road Livingston, NJ 07039
Phone: 973-992-1793,   FAX: 973-533-1442

October 18, 2018 (jw)