This one is from an ADSL forum. Somebody there has noticed that he gets periods of interference which cause high error rates and a fall in snr.
He has tracked the noise down as appearing at around 1600Khz (he is on ADSL2+) and recorded it. He hasn't had any luck DFing it but with only a MW radio and no experience that's not especially surprising.
I've only recently started to rebuild a station after many years of inactivity. I've had a listen and can't even start to guess what it may be. Part of the time it sounds like it may be data but the characteristics vary during the fairly short recording period. He didn't retune at all.
He mentioned that he does live close to an Army barracks which may well be relevant.
Now I reckon you folks must have heard just about everything on air and may be able to help here. This is an MP3 of the sound...http://www.smsmasters.co.uk/1600khz.mp3
Any thoughts appreciated.