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 Tribune Co.,
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 helped by a hefty boost in performance at its broadcasting and entertainment operations, 
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said 
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net income jumped 21% in its third quarter 
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ended Sept. 24
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 on a 3% increase in revenue.
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 The broadcasting and newspaper concern, 
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based in Chicago,
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 said 
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net was $62.7 million, or 77 cents a primary share, up from $51.6 million, or 69 cents a share.
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 Per-share figures this year reflect $6.8 million in preferred-share dividends;
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 the 1988 quarter didn't have such a payout.
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 Revenue rose to $590.7 million from $575.1 million.
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 Nine-month net climbed 19% to $174.8 million, or $2.21 a primary share, from $147.5 million, or $1.94 a share. 
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Nine-month per-share figures for 1989 reflect $12.9 million in preferred dividends 
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that had no counterpart in the year-earlier quarter.
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 Revenue rose 4% to $1.79 billion.
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 In New York Stock Exchange composite trading Friday, Tribune closed at $49.375, down $4.75.
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