Power-One Inc., a power conversion product manufacturer in Camarillo, revised its first-quarter revenue outlook due to a contract manufacturer’s supply shortages. Revenues for the first quarter of 2006 are expected to be anywhere from $61 million to $64 million, below previous expectations of $65 million to $68 million. Power-One said that approximately $4 million of expected fourth-quarter sales will roll over into the second quarter. The company is anticipating sales will range from $70 million to $75 million for the second quarter.