Look where the tire meets the rim. There might be a riser (the little tits and strings you see on newly molded tires), or some other bit hanging off and ticking against the brake shoe.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.