No32 telescope

[Peter Laidler]

Just been having a browse through my old tatty copy of the No32 EMER and came across a 1952 (could read 1956.....) miscellaneous instruction regarding the PLATE, locking segment. For our purposes this is the little brass cover at the rear of the range turret, held on by 4x (or 2 on the later cheaper Mk3's) 8BA cheese or round head screws. Got it now.........?

The instruction reads in as many words '......where one or more of the locking plate screws fails to engage, is stripped, loose or in any other way unsatisfactory(*?), then the rearmost parts of the telescope will be stripped from the telescope and repaired in the following manner.........

Anyway, then all the screw holes will be drilled clear with a .090" drill and retapped to 6BA. (All screw holes are to be so repaired regrdless of how many holes are stripped). Thereafter the figure 6 will be stamped '....on or close to the centre of the plate to indicate in the future that this instruction has been carried out. Replacement screws will be Z1/ZA-XXXXX SCREW steel or brass, 6BA, round head blah blah blah suitably cut to length!

Naturally, being an EMER and as in all things official, it goes on and on a bit but there it is in a nutshell. And, like all things EMER and official, there's a bit of ambiguity too! I mean, where I add (*?) in para 2 above. Does a butchered screw head mean that the screw is in any other way unsatisfactory? And why not 6BA Cheese head if they were available in the Instrument shop anyway? It also doesn't mention that the holes in the plate will also be bored out to the 6BA clearance size but I suppose that's obvious really

There it is. If you have a small figure 6 on the index plate OR close to the centre (could that be on the tube too?) that's the reason. If you already knew this old guff, then just ignore it

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