I use only open-wire fed antennas here. I have 3 feedlines that come right into the shack to balanced tuners (Palstar BT1500A) and run the legal limit with few RFI problems. My house is in the middle of a large rhombic (unterminated) antenna. I don't have a station ground other than the AC safety ground at my shack. My shack is in the basement but Ive had this same setup on the second floor with good results. IMO, an outside ground thats brought to the 2nd floor is not needed and in fact will cause problems. If I had any coax feeds I would follow the SPG design for lightning protection but with open wire I have disconnects where they enter the house and ALWAYS disconnect and ground them (common ground to AC entrance) about 20' from the house. A balanced tuner will help a lot. Open-wire feedline probably isnt the cause of your RFI. It sounds like you may be on to something with your latest post. 73, Steve
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