Free IEC Standards IEC 60130-9-2011 pdf download Part 9: Circular connectors for radio and associated sound equipment IEC 60130-9-2011 pdf download.Connectors for frequencies below 3 MHz - Part 9: Circular connectors for radio and associated sound equipment. This part of IEC 60130 relates to circular connectors for radio and associated sound equipment. NOTE IEC... 07-18-2021 Get More