About Us
Tunwall Radio LLC manufactured broadcast switch and transmitter control systems for 22 years. The TRC Series, introduced in 2004 with a single‑switch controller, expanded to include ten models supporting single, dual, and triple switch configurations. The company also produced custom switch controllers for FM and TV applications and designed and built AM directional phasor and transmitter control systems. Tunwall Radio control systems are in use throughout the U.S., Canada and in select international markets.
Tunwall Radio LLC is no longer making new products, as the owners have retired. However, the company remains committed to the reliability and long‑term performance of its installed equipment. Full technical support continues for all Tunwall Radio products, with the same high standards of engineering and service our customers have relied on for years.
Steve Tunwall started Tunwall Radio after more than a decade in radio broadcast engineering. His experience as a station chief engineer and later as a corporate group director eventually led to an interest in control system development. He is responsible for all Tunwall Radio product design and construction.
Leslie Tunwall served as the company Business Manager. Her broadcast background includes positions in radio as news reporter, anchor and manager.
After starting the company in Ohio, Tunwall Radio relocated to north central Florida in 2014. After announcing their retirement in late 2025, the company ended production in March 2026.
Our History
Tunwall Radio is connected to the earliest days of radio. Steve Tunwall’s grandfather, Carl Tunwall, Sr., owned and operated radio station KFJY in Fort Dodge, Iowa. Broadcasting at 1220AM, it was one of the first stations in the state, receiving its license from the FCC in 1924. Tunwall Radio Corp. also owned and operated a radio store and repair shop in Fort Dodge. Tunwall Radio LLC, a Florida limited liability company, has no connection to the Iowa business. We do use a variation of the original company logo as our own, and we proudly display 1920s era photos of the Tunwall Radio Co. service car in our company literature and here on tunwallradio.com.
