The Federal Communications Commission has issued a formal notice to a licensed amateur radio operator in Pittsburgh after transmissions on a 911 emergency services channel were traced to his residence. The interference affected a UHF “T‑Band” channel used by Allegheny County Emergency Services for dispatching first responders.

According to the FCC, the interference occurred around July 30, 2025, when agents employed direction‑finding techniques and located the source at the home of David Kundston, callsign KD3ASC. The transmissions disrupted the county’s 470.4375 MHz EMS channel, prompting the regulatory action.

Although Kundston holds a valid amateur radio license, operations on dedicated public safety frequencies are prohibited unless specifically authorized. The FCC’s notice highlights the importance of avoiding harmful interference to critical communication systems, even by licensed operators.

This case underscores the ongoing necessity for hams to observe proper band planning and to verify frequency use, especially near reserved channels. Even inadvertent interference can impact life‑saving services and trigger enforcement actions.

Licensed amateur operators are urged to regularly review their equipment’s settings, be mindful of adjacent band limitations, and monitor for signals that could stray into emergency services frequencies. Maintaining discipline in operating practices helps safeguard both the hobby and the public interest.