28 Feb
2012
28 Feb
'12
10:43 p.m.
I don't have examples, but to give him the benefit
of the doubt, perhaps he
was referring to special cases such as projection TVs or some-or-other
studio equipment. Working in RCA he might have been seeing stuff most people
wouldn't.
I have a LOT of 1950s tech docs on RCA television equipment, and I
have never seen any hybrid mechanical systems mentioned in them.
Perhaps he might be confusing the television for radar indicators. In
the mid 1950s, there were still some PPI scopes with the rasters
scanned mechanically, by rotating the yoke. This was a very common
method to get the rotating raster back in the 1940s, but started to be
replaced by all electronic sweep generators in the 1950s. The last use
I can think of for these rotating yokes was on the SAGE gap filler
nodes, made by Westinghouse - up to seven yokes on seven tubes
spinning in sync.
--
Will