🚀 go-pugleaf

>Does anybody know any computer programs (preferably Unix based) that
>would assist in the design of vacuum tubes, e.g. tell you what shapes
>and spacings are required for the electrodes to achieve a particular
>characteristic? Also any recommendations for a good book on tube design?

Wow, that goes back to the old days!  My impression would be that
tubes went out before computer design came in; but I don't know what
some of the surviving tube manufacturers might have in their boxes of
tricks.  In any event, wasn't Spangenberg one of the important vacuum
tube textbooks?  Plus maybe some of the old MIT Rad Lab series
volumes?