The financial crunch at the Pittsburgh Symphony Orchestra may be easing a bit, with orchestra officials announcing that they have closed their budget gap for the fiscal year just concluded, and are having good success with new fundraising tactics designed to make donors feel more involved in the PSO’s season. “For donors of amounts under $250, we used to just give them a receipt for taxes. Now [we give] them thank-you cards and invitations to events and prints their names in programs or on its Web site. We are doing some very simple things better, and for a fund-raising program in transition, with a lot of staff turnover, it is a big success.”