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We make the invisible visible

Spectrum Control (formerly APITech) is a global leader in managing and controlling the electromagnetic spectrum. We make the invisible electromagnetic spectrum visible and controllable with our industry-leading capabilities. Companies and governments trust us to help them design, engineer, and build the devices and solutions that connect and protect our world.

Learn more about Spectrum Control


70 years of innovation

Spectrum Control has a strong heritage of technical prowess and manufacturing excellence built over seven decades. The company’s focus has been in two distinct areas: conditioning & processing of RF and microwave signals and protecting equipment from electromagnetic interference. These major categories have evolved to encompass adjacent technologies including power distribution systems for hi rel applications and optical transmit/receive modules.

During those 70 years of successful growth and market expansion the company has acquired or merged in synergistic companies and operating divisions to address market opportunities and to fill gaps in our product line. Today’s Spectrum Control is comprised of more than 40 businesses and product groups, the oldest of which is C-MAC dating back to 1953.

Some of the companies, product lines and brands in the Spectrum Control DNA.

  • Aeroflex Inmet
  • Aeroflex Weinschel
  • AMP Filter division
  • API Technologies / APITech
  • Amplifonix
  • C-MAC Aerospace
  • Filtran
  • FSY Microwave
  • Islip Transformer
  • Keytronics
  • Kuchera Industries/Kuchera Defense Systems
  • Magnum Microwave
  • Murata Erie
  • Potter Production
  • RTI Electronics
  • Sage Microwave
  • Salsbury Engineering
  • Spectrum Microwave
  • Summit Instruments
  • Texas Spectrum Electronics

Come to us for clarity, answers, and world-class engineering & design expertise