Paula Kerger wants public TV stations to know that the combination of flat station dues, dwindling resources and balanced budgets may be slowly strangling PBS’s ability to fund new-media innovation. “We can’t continue to go down this path,” the network president told her board March 26 . PBS’s member stations are strangling, too, and the network probably can’t count on them to contribute more in dues for fiscal year 2011, which starts in July. The board endorsed a balanced budget — to be sent to stations for comment — that relies on no increases in assessments for member services, program services or fundraising programming.The board also capped at 5 percent any dues increase or decrease levied on an individual station. Fiscal 2011 will be PBS’s second year in a row without an increase in station support.