Take a look at the posts here: https://forums.qrz.com/index.php?threads/75m-phone-wide-interference-jamming .637950/page-5 Scroll to the last page – they used webSDRs to find it. It is fixed now. 9 AM this morning someone shut it down. Came from central Pennsylvania. Was broadband 3.850 to 3.905 MHz 73, Tim K3LR