It was a little more than a week ago when listening station received its new resonant Magnetic Loop Antenna. So far so good, however, the coupling toroid (see the yet-to-be-published design of the antenna :) ) was of low frequency type (Russian M1000HM to be exact) starting to cut off at about 1MHz accordint to datasheet. The replacement toroid, T80-2 runs well above 5MHz and looks to serve as proper replacement.
The result, however, was disappointing to say the least. Todays antenna tests with various configurations ruined several hours of broadcast, but the signal with new toroid remained noisy. It was also almost impossible to tune the antenna (or tuning to have any effect), so the old toroid is back and so is the signal. Back to the drawingboard.