Museum of photography, film and television.  Bradford.  A Highly recommended site and museum.
www.nmsi.ac.uk/NMPFT

Museum of early radio etc Italy
www.marconimuseomagic.com

Camera Museum
www.thecameramuseum.com

Radio Society of Great Britain
www.rsgb.org

The BBC
www.bbc.co.uk

Kodak museum
www.eastmanhouse.org/inc/the_museum/history.php

Narrow Band Television Association.  Early television enthusiasts and their replica televisors and related inventions.
www.nbtv.org