Here is a new
graph image. Things get even more interesting. It remains to be seen whether this pattern is repeated every day. It appears possible that some device somewhere is switching on at 11:20 roughly and off again at around 23:15, early twelve hours apart. So all this tells us something, but I am not sure exactly what. Some piece of large current electrical equipment that is on a timer? An electric motor ?
We have a borehole water pump which switches on and off. It is nowhere near the phone line. I suppose it could be spitting out a load of interference. If so, perhaps we could go to it and detect the rf? Could it easily be suppressed to fix it? This doesn’t seem to fit the pattern though, as the thing doesn’t run according to a twelve hour timer. It comes on when water storage is low and off again when it has filled the tank up again, presumably. That takes some random amount of time. All depends on water consumption patterns which are going to be reasonably variable, not absolutely rigidly fixed, although there will be a rough daily pattern. But people showering or drawing baths will be a bit random in some cases. There is no way a magic number like approx twelve hours, a very significant number, is going to come out of it, as far as I can see.
Things like heating systems are on daily timers, and that class of systems would be my proposed candidate. We do not have anything of that sort on timers. It would have to be some householder down in Harrapul, which is on the main road, who is on the Heasta road and is very near our village’s copper cable. (What is the proper term?)