The elusive Indextron

[jhalphen]

Hi to All,

For CRTFool, the photocells are there alright, it CAN't work without!

see this brighter pix with the photocells layed out in front of the screen.

The room was also darkened.

When the viewfinder's case is open, there is a small polished steel mirror at the top of the case, above the CRT. I suppose it's there to reflect the light down towards the photocells as synching the beam position with the RGB sequence is particularly important at the start & end of the TV field.

When you view a Sony Indextron CRT out from the chassis, there is a different appearance phosphor at the top of the CRT and on the left side, running continually from top to bottom.

From Andy's photo (Thanks! Andy) this is a "run-in" area reserved for sync before the active frame begins. The beam is also re-synched at each line start.

Best Regards

jhalphen
Paris/France