15 Aug
1999
15 Aug
'99
6:37 a.m.
<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