IEC 60169-13 Amd.1 Ed. 1.0 b:1996

Amendment 1 – Radio-frequency connectors – Part 13: R.F. coaxial connectors with inner diameter of outer conductor 5.6 mm (0.22 in) – Characteristic impedance 75 ohms (Type 1.6/5.6) – Characteristic impedance 50 ohms (Type 1.8/5.6) with similar mating dimensions