On Fri, 25 Apr 2014 17:23:17 +0100, "Mr Pounder"
A retired marine electrician of my acquaintance who knew everything
about anything twice over used to use one as a TV aerial on his camper
van, we swapped it one day for a plastic one and over the next few
days observed him frequently fiddling with the set while passers by
who noticed it was now plastic often grinned.
When he finally noticed he swore reception wasn't affected as the
black plastic contained carbon to colour it.
G.Harman