Hi Stefan, Although this is a bit different, but also to do with noise, I bought a very cheap kitchen broadcast radio from Tesco for £9. It has  Long Wave on it, and I am amazed it is the only LW radio I have that can receive all the stations that still are on LW without any background noise once a station is tuned in. It can be mains powered and next to a computer or TV, and still no local noise!! The model number of this Tesco kitchen radio is RAD - 113B. On tuning to a station, it suddenly 'locks on' to it with a small 'jump'. Then the local noise totally disappears, leaving only the required LW programme interference free!! Why is this? -could it be the way this very cheap radio detects the signal? If so, the detection method used in this cheap radio would be very useful for LF work, in which local mains noise is always a big problem. Perhaps someone here also owns this Tesco radio, and can answer why it is so quiet indoors where all my other Long Wave (and much more expensive) receivers are all swamped by local noise when used indoors?? I hope this is useful. Regards, David.