MFJ 1886 RX loop antenna

[mike43]

Hello,

I have just erected a loop antenna for HF above my bungalow roof about 20 feet in the air. I have Mini 8 coax running to the rig. I am not too sure if my incoming BT phone line would be a source of RFI. The reason I ask is that the loop is roughly 18 inches away from the incoming telephone wire. I can go higher but was just wondering if the cable is passive or is giving out noise. Forgive my ignorance.
Mike.