31–40 of 53 posts
Glassblowing is a disappearing trade itself. I'm not sure what university chemistry departments are doing these days, an in-house glass shop with one if not several skilled glassblowers used to be pretty common. Likely it's cheaper now to have this outsourced.
http://www.latimes.com/local/education/la-me-caltech-glassbl...
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Isn't that why the getter is added?
That getter is fascinating, it's a new concept to me. Recently we blew a picoammeter because we fired up a vacuum guage in UHV after disconnection from the roughing pump. The vacuum guage out gassed massively giving us shit vacuum, this then fried the picoammeter and left us scratching our heads for a few hours. Firing the vacuum guage while still connected to the roughing pump would have solved this problem. Thanks…
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There's no vacuum in a Nixie Tube! That being said, it would be nice if classic tubes of yesteryear can be remade efficiently. Especially for antique radio enthusiasts.
Why do you say there's no vacuum? That's one of the steps in the videos.
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There's no vacuum in a Nixie Tube! That being said, it would be nice if classic tubes of yesteryear can be remade efficiently. Especially for antique radio enthusiasts.
Uh, what? Production involves pumping down to high vacuum, heating to degas, and then refilling with neon/argon at low pressure. Granted the production tube isn't at high vacuum, but it's not equivalent to ambient.
Artisanal vacuum tubes are a thing.[1] There's some interest in this from the vinyl record and overpriced tube amp crowd. There are even people who rebuild old CRTs for early TVs.[2] It's a lot of work. [1] http://hackaday.com/2014/11/21/artisanal-vacuum-tubes-hackad... [2] http://www.earlytelevision.org/crt_rebuild.html
I've seen this elsewhere and what baffled me was the startup aspect of it all. He spent 5 years doing this and a non-insignificant amount of money. How does he know it will eventually all be worth it? It seems like such a baffling risky step to take.
I can't imagine him getting back money that was spent on the equipment visible on the video selling these tubes. It seems to me more like the money wasn't a problem, and he just really wanted to start making these tubes (which is awesome).
I've been thinking about a glass lathe on CL for awhile now.
My problem is space.
This is really cool. I've been enamored with Nixie tubes since I was a kid, and I finally got my hands on some surplus CCCP tubes and started a project with them. I'm keeping somewhat of a diary of my progress with photos and videos in this collection of tweets about the process: https://twitter.com/jazzychad/timelines/773442085278085121
I've seen this elsewhere and what baffled me was the startup aspect of it all. He spent 5 years doing this and a non-insignificant amount of money. How does he know it will eventually all be worth it? It seems like such a baffling risky step to take.
As for how he knows it will eventually be worth it, isn't that the case with most new businesses?