Museum of the Broadcast Television Camera

Marconi MkI Television Camera PSU valve side

Marconi MkIB Television Camera Power Supply Unit type T-A 174002.

This is the PSU for the camera channel, valve side.

16 valves were used 6 x 5R4GY, 5 x 6AS7G, 6Y6G, 6AC7, 6SL7, 2 x VR150.

The main transformer is in the white box, bottom right, and is a special light weight design with fan cooling. The fan in the picture is not original, the original was a centrifugal fan which discharged its air upwards to cool the valves.

An air filter (missing) fitted in the slot to the right of the transformer.