Need an Elston analog video board for VT100

[Richard]

In article <006401c74c86$d1d87120$920718ac at CLCILLINOIS.EDU>,
    "Julian Wolfe" <fireflyst at earthlink.net>  writes:

> There's two types of electronics in a VT100, either the Elston CRT and
> analog board, or the Ball Brothers CRT and analog board.  See the VT100
> service manual on Bitsavers for more details. 

Presumably the analog boards are a little different for the different
tubes?  Somehow I expected DEC to be more standardized, but I guess
they standardized at the point where the analog board plugs into the
rest of the unit.
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