Joe Nicholson wrote in a message to Tom Walker:

 -=> Quoting Tom Walker to Joe Nicholson <=-

 TW> It didn't really spin that fast. And in those days of 7 Inch
 TW> CRT's it was not really that large. Concidering the size of
 TW> the CAbinet those soemthat large chassis needed to have.
 TW> Of course for a modern 36 Inch direct view TV it would be a problem.

 JN>  3-foot CRT = 6-foot color scanner = 9 feet minimum for the TV. 

 JN>  No, I doubt if CBS really pondered the issue of large-screen  TV
 JN> back in the 1940's when it fought RCA for the standard.  

 JN>  FWIW, many, if not most, TV shops in the 50's and 60's had a 
 JN> flying-spot scanner that scanned an image inserted into it
 JN>  and produced a weak signal for a TV.  Those shops often had  an
 JN> advertisement displayed on a set in the front window
 JN>  overnight until they discovered it "burned" into the CRT.

I've seen those instruments depicted in books,  etc. but never actually had
the use of one.  I was thinking about building one (and still do have the
3" CRT and the stuff I need to know to make it work) but somehow the
idea never got to be that important to me...

 JN> Those instruments were great for getting a signal on a TV to 
 JN> adjust width, heighth and linearity when there wasn't an Indian 
 JN> head signal available from a station.

The beauty of the setup I'm envisioning is that you could set it up to work
with monitors,  too.  Since we're not talking about the finicky sweep
circuits of a typical TV,  where the HV is derived from it too,  I could
probably go pretty far out there,  with good design.  Even make the rest of
it solid-state,  with the parts available now.  Hmm.  

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