Hello.
Yes, I can select between tv audio and tv audio and vision.
In times of no television broadcast, the television transmitter was used for radio broadcasting.
Here is another video, I have recorded today with some still images from the chassis and a short video clip. See the color of the phosphor. The white is a yellowish white, not that blue-tinted white of modern P4 phosphors.
http://www.youtube.com/watch?v=eAHnJqaD06A
Meanwhile, the number of surviving Telefunken FE VIs increased up to ten. As a result of such videos on Youtube, other people reported further FE VIs which existence was not known before.
Kind regards,
Eckhard