RADIO RATINGS: The spring Arbitron book has just been released, polling listenership from March 17 to June 8. In the winner's circle: WKYS-FM (93.9) is back on top with a 10.7, up from 8.8 in the winter book; WRQX-FM (107.3) is No. 2 with 7.6 (6.7) and WMAL-AM (630) dropped back to third with 7.2 (10.6).

The rest of Washington's current top 10 radio stations:

4. WGAY-FM (99.5) 6.6 (7.1)

5. WHUR-FM (96.3) 5.7 (5.4)

6. WLTT-FM (94.7) 4.8 (4.5)

7. WRC-AM (980) 4.5 (3.1)

8. WMZQ-FM (98.7) 4.1 (2.7)

9. WPKX (AM 730/FM 105.9) 3.9 (5.3)

10. WGMS (AM 570/FM 103.5) 3.8 (3.1).

MOVING IN: Not only did WETA's new general manager, Kim Hodgson, have to manage the move from Seattle into his new home in Arlington, but he also supervised the radio station's move from Arlington into its new offices at L'Enfant Plaza. Hodgson, who has 18 years of public radio experience, was general manager and program director of Seattle's KUOW-FM, a fine arts/information station.

When Hodgson joined the Seattle station, "it was only marginally listener-funded, about $16,000" he says. "When I left after five years, we had $175,000 in annual listener support."

Improving the station's facilities and encouraging listener support will be his top priorities, and Hodgson anticipates a move to Shirlington, where there will be a consolidated facility for the radio and television stations.

WETA also has added a new magazine-style news program to its schedule. "It's 4:30" replaces Sanford Ungar's "Dateline" program, canceled as part of National Public Radio's recent austerity measures. Hodgson says he hopes "It's 4:30" will add "a more consistent local presence" to WETA's news coverage. The 30-minute daily program, with hosts Therese Keane and Bob Davis, will precede "All Things Considered," which begins at 5 p.m.

At WAMU-FM, Nina Kern is the new general manager. Kern has been with the station since September 1982 as development director for fund-raising and public relations, and worked with the Corporation for Public Broadcasting before joining the station.

AIDS INFO: WRC-AM (980) presents two programs on Acquired Immune Deficiency Syndrome today. At 5 a.m., Cuthbert and Company features a report by NBC news correspondent Peter Laufer. Dr. Kevin Cahill, editor of the book "The AIDS Epidemic," is among the guests. And at 3 p.m. Ron Eisenberg hosts a special two-hour program with guests Cahill; Mel Boozer, former director of the National Gay Task Force's civil rights division and former president of the D.C. Gay Activists Alliance; Dr. Peter Hawley, medical director of the Walker-Whitman Clinic; AIDS victim Mike Callen; and Dr. Henry Masur, specialist in infectious diseases at the National Institutes of Health.