vac tubes / was Re: Schematics of Atanasoff-Berry

Dave McGuire mcguire at
Fri Sep 5 21:55:24 CDT 2008

On Sep 5, 2008, at 4:45 PM, Tony Duell wrote:
>>> Would not a green & red Ne-2 would fit the  mood
>>> better.
>>> If you have the HV why not go nixe tube?
>> I'm trying to use 12V as B+.
> If you can find them, how about some DM160s (or whatever you call them
> across the Pond). Little flourescent indicator tubes with 4 external
> connectors. A 1.5V or so filament (directly heated cathode), a control
> grid which needs to swith from 0V (on) to -3V (off) wrt the  
> filament and
> an anonde that you really need abotu 24-30V on (but it might work with
> less). They glow green when on.
> These were certainly used as indicators in early transistorised
> computers/peripherals.

   I've never heard of these.  I'd love to find some!


Dave McGuire
Port Charlotte, FL

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