Another fantastic Tektronix CRT manufacturing film - Page 1
Forum section: electronics / general

author: rx8pilot
author_rank: Super Contributor
timestamp: July 03, 2017, 09:10:10 pm
content: https://youtu.be/jHGAnJjnNY0These films are just amazing. The details of the high-end CRT assembly process are so interesting. Consumer TV's were more automated, but tubes for scopes were far more challenging because of the precision and operating parameters. Really fun channel to watch for sure.

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: July 04, 2017, 12:39:37 am
content: There's another one where they show the ceramic CRT process...

author: helius
author_rank: Super Contributor
timestamp: July 05, 2017, 01:10:40 am
content: Sorry to be negative (not sorry), but the first video contains some serious errors at around 1:15.The electrons in a scope tube do not travel at almost the speed of light; using the accelerating voltage (typically around 18 kV) and the energy-momentum relation, you can calculate the speed of the electrons hitting the screen is about 0.27 c. The next statement is also a whopper: "they have no inertia". This is so bogus it would seem to be a joke, but the tone of the video is not at all funny. This is accompanied by a demonstration of slow and fast sweep with voiceover, "they can be moved either slowly, or at a very rapid rate". The speed of the electrons does not change at all with the sweep rate! In fact the sweep rate has no connection to any moving particles whatsoever, and can be higher than c.

author: TerraHertz
author_rank: Super Contributor
timestamp: July 05, 2017, 02:42:10 am
content: Oh boy, boiling sodium cyanide. 11:16 But the lady has gloves so it's OK.11:45, a lead oxide spray gun booth. At least she gets a mask.It's a shame the film producers (1st film) didn't care much for technical accuracy, or didn't understand about electrons, mass, speed of light, inertia, etc. I also laughed at the toroidal transformer 'deflection coil' around the yoke of a TV CRT, and the circular cloud of electrons being emitted from a cathode. I guess they had a low graphics budget, or someone's cousin did the animations.The cars in the Tektronix parking lot are awesome. Who misses the sixties? ... crickets?That was a lot of nostalgic fun. I wonder what it would take today to set up and reproduce those tubes? The guy making large nixie tubes showed the effort required just for simple nixie tubes.

author: schmitt trigger
author_rank: Super Contributor
timestamp: July 05, 2017, 02:54:59 am
content: The workmanship in those old Tek scopes was beyond amazing.No wonder they were as expensive as a new small car.

author: Macbeth
author_rank: Super Contributor
timestamp: July 05, 2017, 03:03:23 am
content: TerraHertz,I know right, Tektronix are scumbags abusing and poisoning their female employees while the misogynist patriarchal cis-het white males are lording it up in their luxury offices above the factory floor fitted glass ceiling.It's theRadium Corporationall over again, but for the baby boomer generation.

author: jh15
author_rank: Frequent Contributor
timestamp: July 05, 2017, 05:01:07 am
content: New small car, more like new small house

author: schmitt trigger
author_rank: Super Contributor
timestamp: July 05, 2017, 04:44:30 pm
content: I would not single out Tektronix.Most manufacturing corporations in the earlier decades of the XX century, polluted the environment and exposed their workers.Some worse than others.That is the reason OSHA and the EPA (both in 1970) came into being.

author: rx8pilot
author_rank: Super Contributor
timestamp: July 05, 2017, 06:58:17 pm
content: Quote from: helius on July 05, 2017, 01:10:40 amThe marketing people had to translate the engineers to make the film. You win some, and lose some. My experience is that engineers hate the marketing teams so they push the weakest engineer on the marketing people so they can get 'real work' done themselves.

author: LabSpokane
author_rank: Super Contributor
timestamp: July 05, 2017, 07:48:50 pm
content: 0.27c is not c, but certainly is fast enough that relativistic effects become a demonstrable thing, and that's where the misunderstandings can come in when speaking to a layperson.And virtually no manufacturing technique of yesteryear could be lawfully implemented as-is today. The problems noted at Tek were problems everywhere.Tek (and obviously Intel and others) also spawned an incredible variety of industries in an area that was almost solely known for timber for decades. When timber went away, industry surrounding technology and jobs stayed. That's a good thing.