Honeywell / H&P Hughey Phillips Obstruction Lighting Flashguard - High Voltage Rectifier Printed Circuit Board - 277-3937 : High Voltage Rectifier Printed Circuit Board (FG 2000B/3000B) Honeywell / H&P Hughey Phillips Obstruction Lighting Flashguard - High Voltage Rectifier Printed Circuit Board - 277-3937