As Congress threatened to convene a hearing on how CPB distributes its money, a public TV review panel released a proposal last month to change the formula that allocates grants to stations. The fixes ought to please North Carolina’s UNC-TV, which had complained to hometown members of Congress — who pressed for the hearing — that several state networks like itself pay more in PBS dues than they receive in Community Service Grants (CSGs). The proposal would aid state nets by establishing a credit for licensees that operate three or more transmitters. If the recommendation is adopted by the CPB Board, UNC-TV would see an 80 percent increase — about $320,000 — in its base grant in fiscal year 2003, according to CPB. The changes would also reduce the gap between the dues that UNC-TV pays to PBS and the grants it gets from CPB.