TEN-TEC The First 40 Years. Author N.L. Williams, NR4RR, takes you through the first 40 years of the history of TEN-TEC. From the founding of the company in 1968 to the 2008 release of the Omni-VII, Williams’ book is a 132 page illustrated description of all that happened behind the scenes to make TEN-TEC what they are today.