21 Aug
2016
21 Aug
'16
8:02 p.m.
On 2016-Aug-21, at 6:06 PM, Mouse wrote:
A Beckman/Berkeley model 5230 "UNIVERSAL EPUT?
AND TIMER", whatever
that is. The most visually notable feature is that it has four display
columns with ten digit positions in each one, presumably with a lamp
behind each position.
These are digital electronic counters implemented with vacuum tubes.
EPUT = Event Per Unit Time, i.e. frequency.
Ten neon lamps for each digit of the readout.
If you want a manageable (and obtainable) example of tube-based digital electronic
technology this would be a choice.