On Fri, 5 Oct 2018, Bill Degnan wrote:
The 91/92 is pretty rare compared to the 51/52. I bet one could glean *most* of what one would need from the 51/52 manual, but not all. Could be totally different too. The guy who contacted me I think wants to make his 91 "into" a 51. But wow the 91/92 manual is not already scanned, surprised.
Converting a 91/92 into a 51/52 would require a different HEAD, as well as changing the stepper. Stepping could be dealt with in software, to double step, but the narrower head means that it would not do an acceptable job of RE-writing tracks that had been previously written by a "normal" 48tpi drive, and that would ever need to be READ later by a "normal" 48tpi drive.
Unless there is some DESPERATE need for the push button door latch, cosmetic match, or something, it would make more sense to find a 48tpi drive.
OTOH, it is likely (NOT A CERTAINTY) that the 91/92 is similar enough that parts other than head or stepper from 91/92 could be used to repair a broken 51/52.
-- Grumpy Ol' Fred ci...@xenosoft.com
