Museum of the Broadcast Television Camera

Marconi MkIII Television Camera Image Orthicon scanning yoke

Marconi MkIII Television Camera Image Orthicon scanning yoke

The yoke is mounted on a ball bearing carriage to allow the tube to move forwards or backwards to the correct point to focus the scene image onto the Image Orthicon tube photo cathode.

 

It is large and heavy and sets the basic size of the Marconi MkIII camera and also the other cameras that use the 4.5 inch tube.