There is a company called Sewelldirect that used to provide a well shielded HDMI cable. They had a webpage on the subject. However, I can't find it on their website anymore.
Apple sell a properly shielded HDMI cable. BR John McAuley From: Ken Wyatt <[email protected]> Sent: 29 April 2021 15:54 To: [email protected] Subject: Re: [PSES] EMC/EMI Cables The only sure way to qualify an HDMI cable manufacturer is to dissect the connector - cable termination and check for pigtails. https://interferencetechnology.com/hdmi-cables-emi/ The article references some original investigations by Begey and Altland (DesignCon 2008). Cheers, Ken _______________________ I'm here to help you succeed! Feel free to call or email with any questions related to EMC or EMI troubleshooting - at no obligation. I'm always happy to help! Kenneth Wyatt Wyatt Technical Services LLC 56 Aspen Dr. Woodland Park, CO 80863 Phone: (719) 310-5418 Web Site<http://www.emc-seminars.com> | Blog<https://design-4-emc.com> The EMC Blog (EDN)<https://www.edn.com/electronics-blogs/4376432/The-EMC-Blog> Subscribe to Newsletter<http://www.emc-seminars.com/Newsletter/Newsletter.html> Connect with me on LinkedIn<https://www.linkedin.com/in/kennethwyatt/> On Apr 28, 2021, at 12:45 PM, Larry K. Stillings <[email protected]<mailto:[email protected]>> wrote: L-Com seems to have a good understanding on how to construct HDMI cables with 360 shields https://www.l-com.com/audio-video-hdmi-cable-assemblies Known problem for quite some time now Larry K. Stillings Compliance Worldwide, Inc. Test Locally, Sell Globally and Launch Your Products Around the World! 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Opinions, conclusions and other information in this message that do not relate to the official business of my firm shall be understood as neither given nor endorsed by it. From: Cass Carmanico Sent: Wednesday, April 28, 2021 2:24 PM To: [email protected]<mailto:[email protected]> Subject: [PSES] EMC/EMI Cables Hi guys, I am having issues with getting audio/video product to pass the class A limit. I've narrowed it down to the HDMI cables. Even the ones with the ferrites on both ends are inconsistent. Does anyone have a recommendation on where to find good EMI/EMC HDMI Cables. Thanks, Cass ---------------------------------------------- This e-mail and any attachments may contain information that is confidential to Ross Video. If you are not the intended recipient, please notify me immediately by replying to this message. Please also delete all copies. 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