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Known to bluegrass fans as the fiddler for the Johnson Mountain Boys, Eddie Stubbs “moonlights” every Sunday from 2-5 p.m. hosting WAMU-FM (88.1) “The Eddie Stubbs Show.” A mix of erudite historian, impassioned crusader, and pure fan, Stubbs champions the hillbilly, honky-tonk, and bluegrass music of the ’40s, ’50s, and ’60s. More than a stroll down memory lane, Stubbs’ show recreates a “golden era” when the country market was growing but still insular enough to sustain distinctive styles and themes (vice, infidelity, and guilt are some of Stubbs’ favorites.) On Sept. 19, Stubbs will be joined for all three hours by country star Bill Anderson. You can count on hearing some of Anderson’s many ’60s hits, the hits he wrote for others, and plenty of reminiscences of an era when a country star could dare to be as homely and homespun as Ernest Tubb.