Continue to Site

Welcome to our site!

Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Trouble understanding vacuum tubes

Status
Not open for further replies.

Ashford

New Member
I got to thinking about vacuum tube and I was wondering, if you suck all the air out of a tube to make a vacuum tube wouldn't than mean that the pressure differential would crush the glass/tube?
 
The fact that millions of vacuum tubes and incandescent light bulbs have been sucessfully manufactured is proof that glass can survive the pressure difference.
 
I guess it depends how thick the glass is. But yeah, 30psi you'd think would be enough huh? After seeing how it can crush other things in vacuum bagging operations. It could be that the glass is deceptively fragile because it is brittle, not because it's weak, after all we have things like fiberglass reinforcement.
 
I've actually sealed stuff at 10E-6 Torr and there are vacuum guages called ionization gauges that are used to measure very low vacuum.
 
Status
Not open for further replies.

Latest threads

New Articles From Microcontroller Tips

Back
Top