Website Redesign

Welcome to our newly redesigned website.  B.W. Darrah, Inc. has been on the web since 1996 and occasionally it is necessary to update the site.  If you have any difficulties using our new site or finding the information you are looking for, please send us an email and let us know.

Transformer Design Webinars Coming Fall 2012

This autumn, Rale will be conducting a series of Webinars demonstrating the design techniques for specific types of transformers or chokes.  Participation in the Webinars will be limited, so registration will be on a first-come first-serve basis.

We would like to have the opportunity to notify your design engineers about these Webinars giving them the opportunity to sign up if they are interested.  All Webinars will be free, no-charge events.

Can you please provide us with the name(s) and email(s) of the people in your company to whom notices should be sent?  Please send any who should be included to info@bwdarrah.com .

Rale Hadzimanovic is recognized as the leading transformer design expert in Europe and consults with DIN and other worldwide certification organizations.  Over 40 years’ experience designing transformers and consulting in the industry gives Rale a unique perspective that he will offer in his new Webinar series. 

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Cutting Tool Store


Pneumatic Cutting Tool
Pneumatic cutting tool
Ideal for cutting small diameter wires, hard or soft.


WEISSER EI 192
Weisser EI 192 Bobbin fits USA lamination
Big bobbin: Metric EI192 fits 2.5" USA laminations.