There is a private community which want to establish a public television museum. Their collection can be seen on
http://www.fernsehmuseum.info/die-sammlung.0.html
http://www.fernsehmuseum.info/zum-rundgang.0.html
The large tv collection is not part of this community. But members are able to visit it. If I have the opportunity, I will try to visit the collection in the next year together with my son. Then I can give some more informations about it.
Eckhard