LONDON (AP) _ Actress Elizabeth Taylor has donated a small gold and diamond ring to be sold at a charity auction in June to help AIDS victims, Christie's auctioneers said Tuesday.

A spokeswoman said Christie's will also be selling donated furniture, paintings and designer dresses specially created for the auction by British designers Bruce Oldfield, Jaspar Conran, Zandra Rhodes and Elizabeth and David Emanuel.

The spokeswoman refused to say how much money Christie's expects to raise in the June 1 auction, but all proceeds will go to the London Lighthouse Hospice and day center for AIDS sufferers.

Miss Taylor's ring features the letter ''E'' formed in gold and surrounded by diamonds. A diamond and ruby ring from the international jewelers Cartier also will be auctioned.

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ITHACA, N.Y. (AP) - An FM radio station Tuesday withdrew its tongue-in- cheek job offer to television evangelist Jim Bakker after listeners narrowly voted against it in a telephone poll, the station's news director said.

WQNY, an adult contemporary music station, had sent a telegram to the Bakkers last Friday offering Bakker a $22,000-a-year sales job and promising to find a job in a cosmetics shop for his wife, Tammy Faye.

Station General Manager Jim Roberts had said the idea came up when the Bakkers told reporters that they would have trouble finding jobs, but would need to work to survive financially.

Bakker resigned from his post as head of the PTL Club as the result of a sex scandal involving a New York church secretary. His $1.6-million-a-year salary was cut off by the PTL board last week.

The station took telephone calls for three hours Tuesday morning, and 742 callers voted that the offer be withdrawn, while 722 voted to let it stand, said John Stempin, news director.

The Bakkers did not respond to the telegram, Stempin said.

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CHICAGO (AP) - Chicago Cubs sportscaster Harry Caray says all his celebrity replacements are doing a great job, but that actor-comedian Bill Murray provoked the biggest laughs.

Caray, 70, suffered what was termed a slight stroke in February, and it soon became apparent the colorful broadcaster, who had not missed an inning in more than 40 years, would not be available for the early part of the season.

Tribune Broadcasting Co. hit upon the idea of using a different celebrity to replace Caray in each baseball game until Caray's anticipated May 19 return.

''I've caught every one of the broadcasts since the season started, and they're all doing an excellent job, but I thought Murray was the funniest,'' Caray said from his Palm Springs, Calif., home.

Heading the list of entertainers standing in for Caray were Murray and actor Tom Bosley, both of whom started their careers in Chicago.

Murray named his son Homer Banks Murray in honor of longtime former Cubs star Ernie Banks, who also is to be one of the celebrity sportscasters.

''I've never had so much fun in my life,'' Murray said. ''It was like a boyhood dream coming true.''

Other guest sportscasters included a few microphone pros such as Brent Musburger of CBS, who began his career in Chicago, and Pat Summerall of CBS, who played professional football.

Columnists included Mike Royko of the Chicago Tribune and syndicated columnist George Will, a Cubs fan since his boyhood in Illinois.

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LITTLE ROCK, Ark. (AP) - The next target for black activism in the United States will be integration into all aspects of the nation's economy, says actor-author-playwright Ossie Davis.

Davis and Ruby Dee, his wife of 38 years, talked to reporters Monday before appearing at the 50th anniversary celebration of the Urban League of Arkansas.

The Urban League is addressing the need to ''help lead America to a fuller understanding that in addition to our rights to be free, we also insist upon acquiring our own powers to be equal. .. . That's the challenge of the next decade.''

Americans have died defending slogans about freedom and equality, but Davis said, but ''we have yet to deal with what we mean by equal. ... Are women truly equal to men? Blacks to whites? How do we measure that?''

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ST. PAUL, Minn. (AP) - The son of slain civil rights leader Martin Luther King Jr. says tolerance for acts of racism in the United States has risen despite progress toward his father's dream of racial equality.

''I just think the tone of the country is such that people feel comfortable venting their feelings in a racist or hostile way,'' Dexter Scott King said Monday.

But he added, ''In all of us, we have a conscience. It's a little button that gets triggered to say, 'Gosh, something's wrong.'''

King, 26, was in St. Paul for a speech at the College of St. Catherine. He told a news conference that he takes his role as a lecturer and spokesman for the Martin Luther King Jr. Center for Nonviolent Social Change in Atlanta seriously.

But he said he doesn't consider himself a civil rights leader, and is planning a career in business after graduating from Morehouse College in Atlanta.

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PROVIDENCE, R.I. (AP) - Mary Ann Sorrentino, the former head of Planned Parenthood in Rhode Island who was excommunicated from the Roman Catholic Church, has become the state's third political celebrity to launch a radio talk show.

Sorrentino, 43, took to the airwaves on WHJJ Monday for two hours with a stream of opinions, ranging from President Reagan's budget to maternity and paternity benefits, plus a mixture of wisecracks.

There's only one job, Sorrentino said, for which women are unfit. ''I don't think women should be donors to sperm banks,'' she said.

Absent from Sorrentino's premiere was the flood of telephone calls from anti-abortion activists that station management and Sorrentino had expected. ''I thought there would be much more grief,'' said WHJJ's station manager, Janet Karger. Earlier, she had said, ''The essence of talk radio is controversy.''

She joins former Providence Mayor Vincent A. ''Buddy'' Cianci Jr., who has a late afternoon talk show on the same radio station, and former state Attorney General Arlene Violet, who has a show on another station.