Toni wrote:
"Then I read about mag-loops having better RX noise immunity than normal
antennas because they react to magnetic fields, whilst man-made noise
occurs mostly on electric fields."

A small loop requires high capacitance for resonance. Thus it has a
narrow-band response and this provides rejection of off-resonance
interference in addition to directional rejection of energy which is not
in the plane of the loop.

Read about small loop antennas (mag-loops) on page 7-24 of ON4UN`s
"Low-Band DXing".

Best regards, Richard Harrison, KB5WZI