The Los Altos History Museum serves up “Ham for the Holidays: Amateur Radio Operators, Then and Now,” an exhibition on display through Jan. 5 in the museum’s J. Gilbert Smith House, 51 S. San Antonio Road.

The exhibition offers a historical perspective on how radio hobbyists help keep neighborhoods safe during disasters and features ham radio equipment through the years and archival photos of hams and local volunteers. Visitors can learn more about what hams do, how they communicate with one another, the equipment they use and how they help keep the community safe.

“Ham radio operators have volunteered to keep our community safe for a very long time,” said Amy Ellison, exhibition curator.

Admission is free. Hours are noon to 4 p.m. Thursdays through Sundays.

For more information, visit losaltoshistory.org.