Welcome to Cherry Clough Consultants

Independent consultants who help designers, manufacturers, system integrators, installers, users deal quickly and cost-effectively with real-life interference (EMI), or compliance with EMC and Safety Directives and similar regulations worldwide. All applications, all industries, all sizes/scales.

Our SI, PI & EMC design techniques have been very well-proven for 26+ years to significantly reduce design and development time and cost; overall cost of manufacture; warranty costs, and financial risks, at all frequencies up to 24GHz (so far!) – whatever the relevant EMC standards: from the 'generics' up to the toughest, such as DEF STAN 59-411 Land Class A. 

And our well-proven guidelines for reducing the Functional Safety (and other) risks that could be caused by EMI have now been standardised by both the IET and the IEEE.

Most of our on-line effort is going into our new website emcstandards.co.uk, why not visit?
Keith’s Blog: https://www.emcstandards.co.uk/blog
On-line training courses & books: 
Keith's Linked In page: https://www.linkedin.com/in/keith-armstrong-449801172/ 

...News – June 2021... 

Keith's one-day training course:
Essential PCB EMC design/layout techniques for SI, PI and EMC in 2021
normally costs 3,000 GB Pounds for a  group of up to 30 people
– available until 30th June for just 50 GB Pounds, at 
(+ UK VAT if applicable)

EMC & Compliance International 2021 is still on - until 30th June 
more than 3 full days of video presentations and PDFs
available on-line 24/7 for only 50 GB Pounds! 
(+ UK VAT where appropriate)

The archive of the very popular EMC Journal
has been rehosted 

All of the issues of the EMC Journal, and much else associated with that very successful UK EMC magazine, are archived, but problems with hosting have meant they have been unavailable for a year or so. They are now rehosted and back on-line! Visit: www.theemcjournal.com or www.compliance-club.com 

COVID-19 - Business as Usual ! (well, with a lot less travelling)
We are still providing EMC, SI and PI design reviews & fixing, and our world-famous training courses, using a mixture of videoconferencing, email, text, phone (and even fax).

Why not use the lockdown to progress new product design/development with everyone working from home offices – there's no reason to stop any design/development projects, even as regards EMC! We can even do some EMC pre-compliance testing ourselves.

Keith Armstrong's training coursenotes now available for on-line purchase
These updated PDFs include detailed change records so you don't have to read through them to find the updated material.

This way of learning good EMC design is better than buying textbooks (which are out of date for years) or attending annual training courses (where most of the material is the same as the year before, you can't simply attend the new or improved material).

The new site for easy and free access to the huge range of Keith Armstrong's published material, and a lot of additional stuff such as EMI Stories, EMC Design Checklists, Webinars, and more.
Register as a Member for even more premium material.
Sign up to the Twitter feed to be kept up-to-date with developments.

For what we used to call "EMC for Functional Safety": 

The current state of the art is: 
"IEEE 1848-2020 - IEEE Approved Draft Techniques & Measures to Manage Functional Safety and Other Risks With Regard to Electromagnetic Disturbances",
purchase from 
The final version is expected to be published as a full IEEE Standard during April 2021.

Keith Armstrong's textbooks 
From October 2018, this is the new site for ordering my books, and some others.

My books are colour-printed 'on-demand' and are not available new from Amazon or other resellers, who might 'mistakenly' list them as being out of print.