On Friday, 9 September 2016 19:10:38 UTC+1, Andy Burns wrote:
Simon Mason wrote:

ARW wrote:

it is a 30mm by 4mm glass capusle with some electronics inside it.

http://wiki.diyfaq.org.uk/images/2/2f/Wtf1.jpg

That is a MW AM antenna on a ferrite rod.

Might be if it was ferrite rather than glass, and the wires were wound
round the outside rather than on the inside!

The ferrite rod is underneath the coiled wire.