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Amateur Telescope Making (The Patrick Moore Practical by Stephen Tonkin

By Stephen Tonkin

This booklet presents an creation to the layout of various telescopes, mounts, and drives compatible for the home-constructor. initiatives comprise tools that variety from a shoestring finances to professional units that aren't commercially on hand. The ability point of every venture is indicated and recommendation is supplied as to what's good to build, given what's commercially to be had. tricks and guidance are incorporated, in addition to listings of respected mail order resources of fabrics and elements.

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Extra info for Amateur Telescope Making (The Patrick Moore Practical Astronomy Series)

Example text

Once the tube interior is completed, it's time to look after the remaining baffling issues. How much remains to be done depends upon the specifics or your telescope, but there are three oftenneglected problem areas. The first of these is the miscellaneous hardware inside the tube - the shiny nuts and bolts used to mount the focuser, mirror cells, or what have you. All of these can benefit from a coat of matt-black paint. It is also worth while to blacken the bevel on your primary mirror with a black chisel-point felt marker or a small brush loaded with matt-black paint.

Prior to attaching the diagonal holder tube to the vanes, I drilled and tapped four sets of opposing holes into the stalk-holder tube near each open end to accommodate recessed hexagonal-headed machine screws of 1/4 in × 20 tpi. (1/4 in UNC; M6). These screws hold and provide longitudinal, lateral, and tilt adjustment of the diagonal stalk. The diagonal holder tube attaches to the vanes with two machine screws. It became apparent that the aluminium tube's softer threads were losing ground to the steel screws.

8 Reflector purchased from the Reid Tool Company. The system allows quick takedown and reassembly with repeatable, accurate alignment. 5 in (38 mm) and attached with screws. Two knurled knobs per pipe attach the spars to the mirror box, and pull the tubes tightly into the channel, giving the same repeatable, accurate alignment of the focuser assembly. 3 The focuser board assembly and diagonal holder. Shoestring Telescopes unit power finder. 125 in (3 mm) plywood. The Diagonal Holder A 6 in scrap section of the spar tube is the diagonal's stalk holder.

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