I would like to add to Bob Camp's comment about twisted pair. In the past I used to provide one-turn resonant loop antennas for AM broadcasters who needed to monitor signals from their transmitters at studio facilities in electrically noisy urban buildings. The three-foot diameter resonant-loops were grounded at the centerpoint and provided low noise reception, but this was degraded if a coaxial lead-in was used. A workable solution turned out to be shielded audio cables. These seemed to have a characteristic impedance of about 150 ohms. At the receiving end we used ferrite 150-ohm balanced to 50-ohm unbalanced transformers. With the balanced circuit and shielded audio cable, very long runs could be employed with little noise pickup. Bruce, KG6OJI _______________________________________________ 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.