Notes:-
The Marconi MkI (A) type TA.111302 has a Knob for the focus control.
The Marconi MkI (B) type TB.111302 has a version of the lever focus control, known as the "beer handle"
The MkI camera was made by Marconi in the UK but is closely based on the RCA TK30 camera.

The 4 lenses fit to the turret using a fine screw thread and a range of focal lengths were available together with external, individual, neutral density filters that could be used in bright conditions. No remote control of exposure was provided. On outside broadcasts this would be operationally very inconvenient!. The later Marconi MkII camera had iris motors fitted to each lens. I suspect that these were also retrofitted to the MkI's that the BBC had when they were used on OBs.

Index
Page 01 MkIB Television Camera twin view. type TB.111302
Page 02 MkIB Television Camera front and rear views.
Page 03 MkIB Television Camera, on tripod.
Page 04 MkIB Television Camera, with the covers opened, right side.
Page 05 MkIB Television Camera, with the covers opened, left side.
Page 06 MkIB Television Camera, close up of the line scan valve and EHT rectifier.
Page 07 MkIB Television Camera, view of top of camera.
Page 08 MkIB Television Camera Viewfinder.
Page 09 MkIB Television Camera CCU type T-A 113302
Page 10 MkIB Television Camera CCU, valve side.
Page 11 MkIB Television Camera CCU, component side.
Page 12 MkIB Television Camera Power Supply Unit type T-A 174002
Page 13 MkIB Television Camera Power Supply Unit, valve side.
Page 14 MkIB Television Camera Identification plates and logo badge.
Page 15 MkIB Television Camera cable connectors, CCU end.
Page 16 MkIA Early surviving camera.
Page 17 MkIA Focus control knob.

Marconi MkI on YouTube Shown at 1.58 mins in from the start.
This was held at the Wireless Hill museum of communication, Australia.
Now in the care of the Pictures In Motion, television and cinema museum in Perth

The MkI is rare, only one is know to survive and one MkIB.

E-mail correspondence received.

Period advert number 1
Period advert number 2

A report on Marconi television equipment was published in Wireless World May 1949 p181.
A picture of a Mk1 in use at the first nation to nation broadcast from Calais on the cover of "Marconi Companies and their people" October 1950. A further picture is on page 2 of the December edition showing a Mk1B televising St Paul's Cathedral through the door of a Bristol Freighter. Tx 30th September.