The yellow encased object is a video field delay line. It’s a fixed delay (mechanical / acoustic) that allows one field of an interlaced NTSC* picture to be overlaid on the other in case of a tape dropout. They’re normally found inside VCRs. Why do these monitors have them?
This set of ancient monitors eventually got too tired to really work and may be up to 17 years old. Not a bad run really.
When I first started working here, I noticed this beautiful but shy little man hanging out with our night watchman.
He would only get close to a couple of people, anyone else would spook him into running off.
One day, he stood on that little wall and gave me a squeaky little meow to come over, and now every day ends with this:
I think every broadcast facility should have its own fuzzy creature watching over things.
There’s another cat around here from time to time but he’s evil so let’s never speak of him again. He’s out there. Watching. Waiting for another victim to lure for a clawing… But he won’t get anywhere near this sunny orange sweetheart.
On most equipment racks you will find the following pattern of holes:
** * ** * ** * ** * **
No, it was not drilled by a drunken woodpecker.
See the holes with the wider spaces between them? Good… IGNORE THEM! They do not exist! You never saw them. Fnord.
See the closely spaced holes? Imagine they’re the dots on a double 1 domino. This means there’s a center line between them. See attached photograph. The center line will be the edge of each piece of equipment to be mounted.
Why are the center holes there? Okay… Fine, I’ll admit to their existence. Begrudgingly…
Some oddball accessories like cover blanks and cable lacing bars may be screwed in here. In the case of cover blanks it’s usually on weird ones that have a single hole in each end of a 1U* high blank. If you install a lacing bar this way it will be in the middle of one rack unit space – handy for the rear rails behind a patch panel.
Otherwise, do not use them unless you really have good reason to.
If you do mess this up…. Well, look at the wonderful mess in the photograph. Huuurrrrrgghhhhhhhhhbbllll.