Hi With *any* cable setup, proper termination is vital. An improperly terminated balanced line can be just as bad as a poorly terminated coax. Things like common mode chokes are part of a *lot* of setups.
What gets messy is that a lot of gear does not properly terminate the cable. It’s high-z so you can run a bunch of them with Tee connectors or some other strange approach. >20 db of return loss is *not* what most cables get terminated in. It doesn’t take a lot of coax to get a quarter wave at 10 MHz. Anything nearly that long is going to be a radiator if you let it. This all gets a bit insane if you have multiple 10 MHz sources (like devices you are testing). Close in phase noise and ADEV both can get really strange as a result. Lots of issues …. Bob > On Aug 29, 2021, at 10:44 AM, Dana Whitlow <[email protected]> wrote: > > Andy, > > Balanced twisted pair may be helpful, but only if adequate precautions are > taken to > avoid creation of common mode *currents *on the line*.* > > Dana > > > On Sun, Aug 29, 2021 at 9:34 AM Andy Talbot <[email protected]> wrote: > >> Hence my observation that balanced twisted pair might be a better solution >> than coax for 10MHz distribution >> Removes all possibility of ground loops >> >> Andy >> www.g4jnt.com >> >> >> >> On Sun, 29 Aug 2021 at 15:22, Dana Whitlow <[email protected]> wrote: >> >>> I believe that a significant problem in my case was not leakage through >> the shield, >>> but >>> rather common-mode currents on the cable. My experiences were with RG-6 >> style >>> cable, >>> namely a cable that mostly went around the outside of the house for TV >>> distribution. >> _______________________________________________ >> time-nuts mailing list -- [email protected] -- To unsubscribe send >> an email to [email protected] >> To unsubscribe, go to and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- [email protected] -- To unsubscribe send an > email to [email protected] > To unsubscribe, go to and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] -- To unsubscribe send an email to [email protected] To unsubscribe, go to and follow the instructions there.
