Jencen - Please don't call me DergMay 18, 2025

So. A while back while clearing Lucian's stuff. We took possession of some valves. In there was a Vidicon tube. I sadly had to return that as it went to the broadcast museum peeps.

Cut to yesterday when we got another batch of choobs from a friend..... Containing not one.
Not two.
But THREE Vidicon choobs o.o

This is how stuff was filmed on analogue TV o.o

It's effectively a back to front CRT.

The front is a special coating that can "store" an image that's being projected on it.
Then a scanning electron beam within the tube flashes across the front plate in the same manner as in a CRT. The electrons interact with the light and dark parts of the image and are spat out via a ring at the front.

One tube for black and white. Often 3 of them for colour.

Show threadSean RABBITT

@Jencen @kieran I worked in the class 100 clean room at the Plumbicon tube manufacturing facility owned by Philips in Slatersville, RI. It was a college internship. My father was a sales engineer for Amperex which became Philips Electronics, and I used a microscope to measure the depth and angle of the grid that detected the photons to determine if there was any regularity to the individual, hand crafted blown glass tubes. (There wasn’t much. :)

A good amount of equipment salvaged by my father made its way to Emerson College and then to the broadcast museum in Woonsocket, RI.

May 21, 2025 at 12:15amWeb