Hello, I'm italian crt owner.
I have a modified Barco Graphics 808 (not S version) with this mods.:

120Mhz R762746 Neckboards
Convergence driver board (S version)
Vert. Def. + Sync board (S version)
Switcher board R762719 (S version)
RGB Driver board R762720 (S version)
Barco Graphics 808S2 v.7.61 Iris3 System Software

Now the projector have original tubes (180DVB22) but I have planned to retube it with Hi-Rez Mec tubes (P16 or PT-18).

I have heard that there are a focus yoke mod. on a Marquee that improve focus, called FrankenYoke.
Because I have found a Thomson focus yokes, is there a way to make this mod on my Barco? :cool:

The label on the yoke says:
ref: 21.695.01P
type: 9251.51
n/s: 6G6

http://img265.imageshack.us/img265/9310/dscn03973rh.th.jpg (http://img265.imageshack.us/my.php?image=dscn03973rh.jpg)

http://img265.imageshack.us/img265/3110/dscn04012ql.th.jpg (http://img265.imageshack.us/my.php?image=dscn04012ql.jpg)

You need this thread:
http://www.curtpalme.com/forum/viewtopic.php?t=2498

I'm not sure anyone but the hobbyist that created these has verified that they improve things. I think the yokes in your barco are better then the thompson ones you have.

Barcos with the high res tubes and "s" version input boards are VERY nice--I don't think those yokes will help you any.

Dave