ar-t;510375 Wrote: > True, most BNCs are 50 ohm. Type N, which is a BNC on steroids, has a > smaller pin for the 75 ohm version. You will destroy a 75 ohm jack with > a 50 ohm plug. But, lucky for us, that does not apply to BNCs. They are > mechanically the same, except for less Teflon around the female pin. > > If anyone is interested, we have some graphs on our site which show > what sticking a RCA in place of BNC does. Lots of technically > gobbledygook, and obviously for a *non-*Slim Devices product. So, only > if someone asks. May not be kosher to give free ad space to someone > else's product. > > At one time, we had a graph showing how much a 50 ohm connector in a 75 > ohm system messes things up. It may be lost by now. Surprisingly, there > isn't that much of an anomaly when you stick one in. It is much, much > less than that of sticking a RCA jack in. Which should not be > surprising. The only difference is less Teflon in the connector, for the > 75 ohm version. The idea is to reduce the capacitance, which has the > effect of raising the impedance. The RCA is a different story. The > physical dimensions are all wrong. > > But........... > > You would think that for as much as those guys charge. > > Pat
Actually, Canare makes a "true 75 ohm" RCA connector. The assembly is very similar to a BNC and it does a good job of maintaining a constant impedance. A big factor in connector impedance matching is maintaining a coax geometry throughout the connector. This is what the Canare does. -- johnM ------------------------------------------------------------------------ johnM's Profile: http://forums.slimdevices.com/member.php?userid=34243 View this thread: http://forums.slimdevices.com/showthread.php?t=73093 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
