Thanks for your reply. The fm radio in the van is fed by a poorish aerial it must be said. Still think I can hear the odd beat, maybe momentary dropout of sound is a better description on internet radio. Cheers.
Reminds me of a house I lived in. It was a wee cottage in the middle of nowhere and the water was from it's own well.
One day the water supply stopped working so I pulled the pipe from the well and found that the foot valve had been repaired with isopon and duck tape. Again, I'd been there for years before the failure.
Having the necessary raw materials to hand I was very tempted to recreate the botch but since a proper replacement was both cheap and readily available I didn't bother. Probably should have in the interests of science.