MIL-P-83927 Power Supplies, Guided Missile Launchers, Single Types Pp-2401B/A Pp-2401C/A Pp-2401D/A, Pp-4285/A, Pp-4286/A, And Composite Type Pp-4506/A And Ps-1037This specification covers power supplies for the AIM-9 missile launcher. The power supply provides the missile with standby power, fixing power, motor drive power and amplification of audio signal.