Originally Posted by virusc
you need to do a resistor swap out (I believe it is on the neck boards) on ECP's to use 07ms > 187 or the other way around. On barcos you just need to change the focus board depending on tubes used or they will not focus correctly as the tension voltage is different between tubes by a little bit. Curt should know
I believe you're thinking of the resistor change on the focus board of an ECP, but it isn't necessary if you are going from 07MS to SD187, the SD187's swap in with no mods at all, as long as the projector originated with 07MS's.
The two focus/shift board versions for Barco 7xx are, one for Toshiba T180's(very, very bright little tubes !) and another for the Sony tubes(either 07MS or SD187 afaik
). I *think* you can interchange the focus/shift boards, but need to adjust the global focus voltage pot...
Also, if you are changing BURNED 07MS's for brand new SD187's, you'll notice a great improvement in light output and focus. However, if you have BRAND NEW 07MS's, compared to BRAND NEW SD187's, then yes, the 07MS's are very slightly better.
Not night and day better, but certainly somewhat of an improvement.