the little loop receiver is obviously only good for AM radio. and because all the hams were either at the hiding place or looking for it, there was nothing else on the 10m band that day 😉 fun times.
yeah, I know, to locate the signal you describe, you'd need better gear. two or three receivers, and precise timing info, or so.
and that whole swarm of channels just showed up at the same time? From 81 to 87.5, or whatever?
Doesn't make sense for it to be IoT, I'd expect those to be up around 2.4 or 5 GHz.