Williams Tube memory, Selectron question, and Charactron - test-drb@ccmp.vtda.org

15 Aug 1999

<The lights ("blinkenlights") on some early machines (and even a few not 
<so early machines) were tiny tubes, as well. A bit more simple than a CRT..

there was one variation that use a dual tube (triodes) in a FF config
so that you could store a bit with an indicator.  They coated one plate 
with phosphor so it was visible and tada, inherent display.

A few years back (1972) I used a few VF 7segment tubes (one 7segment per 
tube) all anodes connecteed together made them a low mu triode and I built
a FF using them as a gag.  Plate voltage was 36-45V.

Allison