[PaulR]

I actually have - er -8 sets in use at the moment or at least taking turns. The cap was in a two pin plug fitted into a lamp adapter so I tried it in a two pin adapter directly in a wall socket and it seemed to work as well as in the lamp, better if the lamp was on as well.

I think I may experiment with several such plugs dotted around and see how that works. It has certainly improved listening using the transmitter as it has been plagued by interference.

Paul