LOS ANGELES - THE smaller of Hollywood's two performers unions ratified a new prime-time TV contract on Tuesday, undermining a last-ditch bid by the larger, more militant Screen Actors Guild to secure a richer deal.

The labour pact with major studios covering 70,000 members of the American Federation of Television and Radio Artists won final approval despite an unusual all-out campaign by SAG urging some 40,000 actors who belong to both unions to vote down the AFTRA accord.

'A majority of members ultimately focused on what mattered - the obvious merits of a labour agreement that contains substantial gains for every category of performer in both traditional and new media,' AFTRA President Roberta Reardon said in a statement.

While AFTRA's margin of victory was substantially less than the 90 per cent range most Hollywood labour pacts attain for ratification, it was not immediately clear how much if any real additional clout SAG would gain in pressing it demands.

SAG leaders had argued that a 'no' vote on the AFTRA contract would give them leverage to negotiate a more favourable settlement with studios for all actors under the larger deal covering 120,000 SAG members in both prime-time television and movies.

AFTRA countered that it secured the best terms possible without a strike, including higher basic wages and new reuse fees, or 'residuals,' for online content, and that defeat of its deal would lead to renewed Hollywood labour unrest.

SAG's contract talks stalemated last week over some of the same issues that led to a 14-week screenwriters strike months ago, such as disagreements over how union talent should be paid for work created for the Internet.

SAG also has pressed for higher residuals from DVD sales, a demand both the writers and AFTRA were forced to abandon.

A number of A-list stars joined the public relations blitz waged between the two actor unions, with Tom Hanks, Kevin Spacey and Sally Field siding with AFTRA while Jack Nicholson, Sean Penn and Viggo Mortensen lined up behind SAG.