Kurt 0 Posted May 14, 2008 I noticed that a supplier advertised 2 types BNC couplers (see photo): one being 50 Ohm type and one being 75 Ohm type. I don't see how a connector can have an 50 or 75 Ohm Impedance? Is this nonsense or do BNC couplers (and other conversion plugs like BNC tot RCA,....) come in two type's? Share this post Link to post Share on other sites
scorpion 0 Posted May 14, 2008 That is a good question. As they are straight pass through devices I would have to agree with you. I truely do not know but I would believe that they are interchangable. I could see where a company that dealt with both products would label them that way to make it easier to quickly find what you are looking for. I would wonder if they are the same part number if you compared them. Share this post Link to post Share on other sites
Kiwi 0 Posted May 14, 2008 Well it is just a short length of cable after all, and cable has an impedance I asked a top notch EE about this decades ago and was assured that using the "wrong" impedance over such a short length is not an issue in lower frequency applications, certainly video easily falls in this category. Share this post Link to post Share on other sites
