Arnold “Stu” Stewart, original founder of STB Electrical Test Equipment, Inc., started his long career working for Western Electro Mechanical Company, “WEMCO” in Oakland. Stu was WEMCO’s instrumental technician for 23 years. Stu was celebrated by his colleagues and customers for customizing products to customers’ requests and needs. Stu eventually began customizing his own products including custom, split core current transformers.

Stu, along with Russell L. Tavare and Kenneth Belfer, incorporated STB Transformer Company, Inc. in 1979. Stu designed and patented his own split core, ST Model in March, 1981. The company grew from there, and after Tavare and Belfer’s departures, Stu’s daughter Patricia A. Tavare, stepped in to assist her father. Pat was fully managing STB by early 1990.

When Stu passed away, his wife Lois continued on as STB’s owner making STB a woman-owned company. In honor of her father, Patricia continued operating and expanding STB with her brother, Jeff Stewart. Pat went on to become the sole owner and President of STB in 2011.

Today, STB continues to be recognized in the industry for providing top-of-the-line, quality products, personalized service and a flawless safety record. Management and staff are working diligently to further expand STB’s products and services offered.