IF YOU ENJOYED Robin Williams' portrayal of military radio deejay Adrian Cronauer in Barry Levinson's Good Morning Vietnam, you might also tune in to Friday night's "Vietnam: Radio First Termer." The National Public Radio documentary is a well-edited one-hour compilation of interviews with Vietnam-era deejays (including the real-life Cronauer), GIs, journalists and others, as well as excerpts from the various radio broadcasts of the period. Deejays and soldiers express frustration with the U.S. Armed Forces Vietnam Network, which often censored or restricted news information in a desperate bid to keep morale above growing antiwar sentiment. There are also excerpts from American pirate stations and the Viet Cong's own Tokyo Rose, Hanoi Hannah, who frequently told the American grunts more about home than their own radio stations. The documentary airs 11 p.m. on WAMU-FM (88.5).

Saturday at 2 and Sunday at 6 in the National Gallery's East Building auditorium, the "Cinema of the American Avant-Garde" series continues with four (free) films by structuralist Hollis Frampton, including Zorn's Lemma (1970), Critical Mass (1971), Poetic Justice (1972) and Surface Tension (1968). The films range from 10 to 60 minutes. Call 737-4215.

Also Saturday (at 2, and Monday at 8:45) at the American Film Institute, there's a double bill of screenwriter Ben Hecht's Barbary Coast (1935), directed by Howard Hawks and starring Edward G. Robinson, and The Black Swan (1942), featuring Tyrone Power as Morgan the Pirate. And in keeping with Black History month, the AFI will show a new 35mm print of The Bedford Incident (1965), one of Sidney Poitier's first starring roles, (in which the race of his character was not a plot element). Poitier's a reporter in this Cold War story of a Navy captain (Richard Widmark) who accidentally fires an atomic missile. Admission at the AFI is $4.50 ($3.50 members) . Call 785-4600 for scheduling information.

Thursday night, David Nicholson, editor/publisher of Black Film Review magazine, will introduce "Black American Filmmaking: New Directions" -- a three-part series of independent black films, sponsored by the Smithsonian Resident Associates. This week it's Kathleen Collins' Losing Ground (1982), a story about a philosophy professor who becomes an actress. The following Thursday (February 18), in Charles Burnett's 1982 My Brother's Wedding, a man must choose between his family and a convict friend. And Billy Woodberry's Bless Their Little Hearts (1984; shown February 25) examines the effects of unemployment on a man and his family. Series admission is $18 ($14 Resident Associates members). All shows, at the American History Building's Carmichael Auditorium, are at 8. Call 357-3030.

Thursday and next Friday (February 12) at the Hirshhorn, as part of its free "Independents" series, it's Henry Jaglom's Someone to Love. In this My-Dinner-with-Andre' variation, a filmmaker (played by Jaglom) invites a bunch of singles to a St. Valentine's Day dinner. The guests include Sally Kellerman and Orson Welles in his last known screen appearance. The following Thursday and Friday (February 18 and 19), it's "ANIMAtion, Not Cartoons," a collection of animated pieces by Jane Aaron, George Griffin, Dennis Pies and Jules Engel. Both shows, shown at the Hirshhorn auditorium, are at 8. Call 357-2700.