Ad sales momentum at Corus Entertainment has gathered pace, as the radio and TV broadcaster posted first quarter revenues up 8% to $240.7 million on Tuesday.

At the same time, Corus saw its earnings to November 30 fall to $46.2 million, against $73.9 million in 2009 when the broadcaster posted one-time profit gains, including a $16.2 million reversal of regulatory fees and a $14.2 million recovery due to income tax rate changes.

On the revenue side, subscriber revenues jumped 9% and ad revenue 8% during the latest quarter.

TV revenues increased by 11% and radio revenues, an under-performer during the 2009 ad industry downturn, increased by 3% in the quarter.

“Our advertising sales momentum continued in our first quarter and, in combination with our cost control initiatives, we delivered double-digit segment profit growth,” John Cassaday, president and CEO of Corus Entertainment, said ahead of an analyst call Tuesday afternoon.