Dielectric was incorporated in 1942 by Doc Brown and produced not only transmission line but also automatic air dehydrators for both land and Naval ship applications. The company’s original name was Dielectric Products Corporation (a "dielectric" is a non-conductive electrical insulator). Dielectric became influential in establishing industry-wide standards of innovation for transmission line, dehydrators and other components.

In 1954 Doc Brown moved the company here to his hometown in Raymond. Dielectric has had several locations in Raymond over the years as well as in Bridgton. We have been at this current location and building since 1959.

Dielectric became part of General Signal Corporation in 1977. By this time Doc had sold the company to Sola Basic Industries which subsequently became part of General Signal.

Dielectric’s products, both dehydrators and RF (Radio Frequency) equipment are sold and installed all over the world. South America, Saudi Arabia, Sri Lanka, India, Europe, Korea, Japan, Malaysia, Norway, Canada, Mexico, England are some of the countries where Dielectric’s products continue to be sold and operate. Dielectric holds dozens of patents on various RF and Dehydrator equipment which helps us maintain our competitive position around the world.

In 1985 Dielectric expanded the manufacturing and offices to approximately 100,000 square feet. In 1986 Dielectric bought RCA’s TV Antenna operation in Gibbsboro New Jersey. This New Jersey operation was closed and moved to Raymond in 1994.

In October of 1998 Dielectric became a division of SPX Corporation . Today Dielectric employs approximately 300 full time employees on two shifts here in Raymond serving the needs of our customers around the world.