boatman Posted April 14, 2013 Share Posted April 14, 2013 There is an IEC standard for BNC connectors which states that 50 and 75 ohm types should be mechanically compatible and mate together in a non destructive way - which makes sense, as it would be terrible if damage were to be caused surely? Yes, there is interchangeability now, but the 50Ω BNC used to have a much larger diameter pin than the 75Ω one. All Tektronix scope's were fitted with 50Ω BNC sockets and I remember (going back to the 1960s now) having to change them on Vectorscopes and waveform monitors to get a good connection. The 50Ω BNC still has a larger diameter centre conductor internally but the exposed pin is the same as the 75Ω one. Sorry mods, getting rather off topic with all this reminiscing. Link to comment Share on other sites More sharing options...
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