Here's the CHA tournament schedule, and according to the Robert Morris website the tournament can be heard on 970 ESPN radio (online only), but I don't know if that's only for Robert Morris games since it's a Pittsburgh station - here's a link to that:
https://www.iheart.com/live/970-espn-2013/ (just click the "play" button in the banner at the top).
Wednesday, March 6
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4:30 PM - #3 Syracuse vs #6 Lindenwood
7:30 PM - #4 Penn State vs #5 RIT
Thursday, March 7
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4:30 PM - #1 Robert Morris vs (winner of Syracuse vs Lindenwood)
7:30 PM - #2 Mercyhurst vs (winner of Penn State vs RIT)
Friday, March 8
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4:30 PM - CHA Championship game