Williams Tube memory, Selectron question, and Charactron

From: Allison J Parent <allisonp_at_world.std.com>
Date: Sun Aug 15 13:37:39 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
Received on Sun Aug 15 1999 - 13:37:39 BST