Hi, group,
Although I read each issue of the Newsletter religiously, the technology of NBTV seems to be passing me by. In particular, there seem to be various mechanical items available now that weren't offered when I was more active in the group, thirty or more years ago.
The club now offers a variety of Nipkow discs, and the 12-inch one is of particular interest to me. Ready details are a bit sketchy, so I wonder if I could impose on one or more of you who has used this disc to volunteer opinions?
1) It seems that the drilling (or punching or burning or whatever) precision is quite good on these. Is that the general consensus?
2) Is the thickness of this disc such that additional 'fine-tuning' (countersinking) is not necessary to eliminate the 'tunnel effect' when used in a camera or viewer?
3) Is this disc likely to become damaged in transport? I would not think of having it mailed, but a friend is coming to the colonies in a couple of months, and if this were in his suitcase, would it travel well?
Creating a precision spiral of holes has been my NBTV downfall from the beginning. Bravo to whoever orchestrates the mass manufacture of these!
Jim Wood
California