In a message dated 23/06/2009 11:00:13 GMT Daylight Time, d...@uk-ar.co.uk writes:
However, it's years since I saw a 75r version, so I don't know for sure. Doing that with BNC's will lead to a flaky connection, as the centre pin on the 75r ones is much smaller. The other way round (50r plug into 75r socket) will damage the socket. As TNC's are very similar to BNC's ??? ---------------- This belief about BNC connectors seems to be an "urban myth", although admittedly one that I shared for many years. Whether or not it has been true at some time in the past, or of some manufacturers, I don't know but the following is a current quote from Amphenol........ --------------- Two distinct types of 75 Ω BNCs are available, and both mate with each other and with 50 Ω BNCs. Type 1 is designated 75 Ω BNC-T1 and provides constant 75 Ω performance with low VSWR DC – 4 GHz. Type 2 is designated 75 Ω BNC-T2 and is usable with low reflection DC - 1 GHz. For applications above 1 GHz, Type 1 is recommended. -------------------- The full text of this can be found at.... _http://www.amphenolconnex.com/products/bnc.asp_ (http://www.amphenolconnex.com/products/bnc.asp) and I've seen similar comments from other manufacturers. regards Nigel GM8PZR _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.