COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Radio Communication and Navigation Equipment
AD/RAD/11
Amdt 2
VHF Transceiver - Modification 6/66
Applicability: All AN/ARC/1 series VHF Transceivers.
Requirement: Modify the equipment to reduce second harmonic radiation from the transmitter to a level at least 40 db. below the carrier power at the fundamental frequency.
Note: Tests carried out on several units indicate that at least 25 db. additional attenuation of a second harmonic power will be necessary to ensure a total attenuation of 40 db. in all cases.
Compliance: Before 31 July 1966.