vac tubes / was Re: Schematics of Atanasoff-Berry > Computer

[William Blair]

Gordon JC Pearce wrote:

> >   Did all the tubes disappear or something?  LOTS AND
> LOTS of tubes were 
> 
> They're still being made, mostly in the former USSR. 
> After Mullard 
> stopped producing valves in the 1980s, a company in the
> USSR bought the 
> whole lot up and shipped it across.  If you buy a Sovtek
> ECC83 or EL34, 
> it's exactly like an old Mullard one.

Here's the list of modern manufacturers:

http://en.wikipedia.org/wiki/Vacuum_tube#Modern_manufacturers