Hi Finnman - you are great! You gave me a great interference eliminator solution, even with PCB drawing! Thank you so much !!! I understood everything immediately. I have no clear idea of the origin of the disturbances in my environment. For example, I was surprised by the fact that sometimes a broadband dipole suspended 35m above the ground picked up more noise than a large Sky Loop hanging from trees 8-12m above the ground.
I explained this to myself with the different directional characteristics of the leaflets, hence it can also be concluded that some of the disturbances come at a small angle from distant regions. I checked it by changing the antennas, which significantly weakened the signals of the annoying but distant OTH radars.
Autumn and winter storms have damaged both of these large antennas, but in the spring I will rebuild the Sky Loop with a circumference of about 200m suspended from trees, and a smaller circumference of about 140m on the roof. I am very convinced of SL antennas, they have a wide reception range with a flat SWR below 2, low noise and high signal level. Better for SWL-ing is just Beverage,but you must have a farm outside your window.
Stay healthy!