You sounded OK when I heard you working Rod MI0JLA a short time ago.
Do you have any sort of Balun where the loop meets the coax? You really should have, as the loop is a balanced antenna & coax is un-balanced.
If your ATU will accept balanced feeder then using ladder line all the way from the loop to the tuner would be better, although maybe not as convenient with walls & things to pass through.
That said, feel free to experiment
I don’t know if you’ve mentioned how high above ground the loop is, but at that length it should be good on 40m when the F2 critical frequency is high enough for NVIS on that band or for local EU contacts.
On higher bands you may find it works better in some directions rather than others, this can sometimes give you surprising DX contacts. My antenna was originally an 80m circumference loop, but I now use it in various configurations. I mostly use about 60m of the loop (plus a large coil at the far end) tuned against ground, or with the other 20m section connected out of phase to reduce my local noise. It wasn’t designed that way, I found it had that effect by happy accident.
Thanks & 73,