Standards for the use of N-type connectors in countries around the world (Part 3) International Electrotechnical Commission, standards for n-type connectors IEC 61169-16-2006 Radio frequency connectors. Part 16: Section specification. Threaded radio frequency coaxial connectors with outer conductor inner diameter of 7mm (0.276in). Type N: characteristic impedance 50ฮฉ and 75ฮฉ IEC 60169-16-1982 […]