FTGH: miscellaneous old stuff

[Brent Hilpert]

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.