Magnetic RFI. sigh.
Try the term "Small Loop Antenna" and we can start to get away from the idea that these antennas have special properties or unique RFI modes.
Your problems are quite common, and asked several times every week. The answers are repeated several times every week.
I recommend reading other posts in the forum for better understanding.
Anyone who thinks that having antennas inside or close proximity to a house, attic, apartment or townhouse (like me) without a very high probability of RFI problems is naive.
The Standard Laundry List:
-Reduce power. Find a level that doesn't cause problems.
-Change bands. Operate on bands that don't cause problems
-Re-orient the antenna
-Move the antenna higher, farther away
-Good housekeeping: Straighten up cables, don't cross, coil them up, put frequency appropriate Mix chokes on all cables close to each end.
-Use chokes, isolation transformers/baluns in the antenna coax
-If using amplified speakers, switch to passive speakers
-Study up on shack ground systems. Eliminate ground loops in/between coax and 'ground wires'.
-Keep ground leads/wires/braid/foil wide and as short as possible.
-Don't use electrical grounds for RF purposes.
-Avoid RF grounds that are resonant lenghts or longer, e.g. 1/4wl or longer.
That's a start. good luck. b.