🚀 go-pugleaf

In article <1993Jan26.102335.6151@eng.ufl.edu>, george@epsilon.ee.ufl.edu (George L) writes:
>Well (not to get in the middle of this), but last time I checked, you had to 
>clear major sections (usually rectangular) of the storage tube at the same 
>time.

That was a result of the fact that terminals were intended to be refreshed in
that manner.  One could easily design a similar machine that could be cleared
radially (make the second grid radial, and apply voltage to the radii, instead
of to a rectangular section of the screen).

>Can you clear a storage tube in a cyclically rotating sweep pattern?

If you build the machine properly, yes.

>If you were using a storage tube, you would have to have it cleared in the 
>area just ahead of the rotating sweep.

It's doable.

>While you could probably use a storage scopein some sort of RADAR display, I 
>think the display the original poster refers to does indeed rely on a 
>persistent phosphor.

That may be.  However, the sweep line sounds to me an awful lot like clearing
the screen by energizing a radial grid.  Consider:  The sweep line is very
bright (as is the screen of a storage tube when you clear it), and from my
recollection of the old radar screens, it erases the images as it passes them.
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Carl J Lydick | INTERnet: CARL@SOL1.GPS.CALTECH.EDU | NSI/HEPnet: SOL1::CARL

Disclaimer:  Hey, I understand VAXen and VMS.  That's what I get paid for.  My
understanding of astronomy is purely at the amateur level (or below).  So
unless what I'm saying is directly related to VAX/VMS, don't hold me or my
organization responsible for it.  If it IS related to VAX/VMS, you can try to
hold me responsible for it, but my organization had nothing to do with it.