John Schneider
8-Jun-2010, 13:51
I have a set of 19" Dagor cells (75x,xxx) that I restored, and another 19" (22x,xxx) set that Steve Grimes mounted into an Ilex 5 (*very* nice work) long before I bought it. When it comes to putting the 75x cells into a shutter, how should I set the spacing?
Can I assume that if I measure the external length of the 22x cells in shutter, going from outer convex surface to outer convex surface (using a surface plate, gauge blocks, and height gauge to measure) that I'll have the correct measurement for the other set of cells?
This is the easiest measurement by far, but I don't know if the Dagor design changed enough over those decades that the spacing was changed. Would taking more measurements to get the internal, minimum cell spacing (from inner concave surface to inner concave surface) be necessary?
Can I assume that if I measure the external length of the 22x cells in shutter, going from outer convex surface to outer convex surface (using a surface plate, gauge blocks, and height gauge to measure) that I'll have the correct measurement for the other set of cells?
This is the easiest measurement by far, but I don't know if the Dagor design changed enough over those decades that the spacing was changed. Would taking more measurements to get the internal, minimum cell spacing (from inner concave surface to inner concave surface) be necessary?