vac tubes / was Re: Schematics of Atanasoff-Berry

5 Sep 2008

...

  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.

-tony

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

vac tubes / was Re: Schematics of Atanasoff-Berry