Museum of the Broadcast Television Camera

Marconi MkIII Television Camera Diascope type BD847

Marconi MkIII Television Camera Diascope type BD847

The diascope for the Marconi MkIII was made by "W Watson & Sons" It has a slide carrier with two 35mm slide positions. the lamphouse has a 12V 6W S.B.C. cap bulb supplied from the camera utility mains outlet via a small transformer.

The slide in the picture with concentric circles is for setting the tube scan sizes together with a check on scan linearity.

The left picture shows the marconi lens mount detail with the hole for the alignment spigot.