At the end of last week, we had a huge high pressure system over northern Europe, bringing outstanding tropo conditions on 2m. I'm not at all experienced in 2m DX, but I found myself involved in an interesting experiment, raising a question of where in the sky the incoming signals appeared to be coming from. I happened to be rebuilding my 5 element stick-'n'-wire quad, which had seen superb service until the XYL drove into it some time ago (tsch!), and had it on a stand for testing as the tropo was running. I switched between it and my SlimJim, to find the signals were essentially identical, no matter where the signals originated (England, Ireland, NI, Scotland, or Wales), or which direction the beam was pointed at. Having now confirmed the beam has been rebuilt correctly and functioning as well as it always did, the phenomenon clearly wasn't a fault with it or its feeder. I wonder if anyone who has spent years on tropo work could enlighten me - and, no doubt, many others - how these signals were propagating in order to have no discernible directionality? Thanks J.