On Thu, Apr 18, 2013 at 4:23 AM, Iain Young <[email protected]> wrote: > > Oh I know it can handle it, I was trying to avoid a nice 10MHz signal > on an unshielded conductor smack on the Amateur Radio 30m band :) It's > more RF here than Time/Frequency, and if I can avoid clashes, so much > the better...
A transformer coupled signal is going to be well balanced and not radiate. You don't need more than a few millivolts If you are worried about a 10Mhz sine wave, then you need to be very much more worried about what Ethernet does. Those sharp edged pulses have harmonics all other the RF spectrum. But no problem because they are transformer couple and the wire is very tightly twisted. Why not try an experiment? Place an RF transformer in a diecast box and make and a 50 ohm load in a second box. Connect the boxes with 100 feet of cable. Put 1 mW of 10MHz into the transformer and then measure leakage from the mid span of the cable. Turn up the power until either you can detect some or the transformer fails. The trick is to use good quality transformers on each end so the signal really is well balanced. I salvage the transformers for old Ethernet cards. -- Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
