Dave Sergeant wrote:

I am puzzled by that. I certainly don't get any interference from my own ADSL - 2Mb fixed rate with the router and telephone lines right in the upstairs shack. Neither my 500kHz vertical in the garden or my (untuned) longwire which runs right into the shack pick up anything. But there are no overhead lines here, it is all underground.

The modem/router/access-point is a couple of meters from the radios.
Here too the phone line is underground.

73  Alberto  I2PHD