I've been given an in car MP3 FM transmiiiter so I can play songs on my mp3 player through my car stereo but I've hit a problem.
The instructions leaflet tells me that I must find a free FM frequency or one with a weak signal.
How do I find a free FM frequency?
I can find a few with weak signals but there's a great deal of interference on these which means the song is playing there but I can hardly hear it for all the crackling noise!