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LATEST NEWS

As of December 13, 2013: We now distribute the Long Wavelength Array (LWA) Antenna and associated Active Balun. Click here for additional details.

As of November 30, 2011: We now distribute the CALLISTO Receiver Kit in various versions worldwide. Click here for additional details.

As of July 1, 2009: We now distribute the Simple Aurora Monitor - SAM-III Kit worldwide except Europe.  Click here for additional details.

The 2nd printing of the book DC Power System Design for Telecommunications may be ordered directly from the author. Contact author for errata related to the 1st printing of this book.

Click here for errata related to the book, Subscriber Loop Signaling & Transmission Handbook: Analog. We have new hardcover copies of this book for sale.

Click here for errata related to the book, Subscriber Loop Signaling & Transmission Handbook: Digital. This book may be ordered from Amazon.com.

As of January 1, 2007: We no longer offer professional engineering services to the general public.