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Materials Needed

Cardboard tube (1)  Construction supply houses usually carry these tubes, whichare used for forming concrete columns. See page 3 for tube length and width. 
Exterior grade plywood  4í x 8í x 3/4" thick. For an eight or ten inch telescope, one sheet will be plenty. 
Paint Flat black is best for inside the tube; any dark color is fine for the the outside of the tube. (Painting the outside of the tube is optional.) 
Sheet Metal Screws  Panhead, size #8, 3/4" long. Get at least a dozen. 
Nails Assorted sizes. Hot-dipped galvanized box nails work well. 
Machine Bolts (3) Three bolts, 1" long; 3/8" inch in diameter. 
Lag Screw with matching washer (1) One lag screw, 3" long; 1/2" in diameter. 
Record (1) One phonograph record--33 1/3 rpm size (A "used" record is fine.) 
Washbasin drainline trap  1 1/2" outside diameter. 
Chrome-Plated Brass Tubing  Weíll need two pieces: one about 1 1/2" long, for the eyepiece holder, and one about 6" long, for the aligning tube. (Available from a plumberís scrap bin.) 
Cedar Shim Shingles  Three pieces, about 1 1/2" to 2" wide. Shingles break easily, so itís a good idea to keep a few extra shingles on hand. 
Wooden Dowel  One piece, about 3 " long. Usually sold as "closet pole" or "hand rail stock"-- Approximately 1 3/4" in diameter. 
Cardboard "Mailing" Tube One piece, 1 1/2" inside diameter, about 2" long (Grocery stores have this tube in the produce department--used for dispensing plastic bags. ) 
Thumbtacks  (3) Three 
Leather Scrap Three small pieces--about 1/2" square. Old belt leather works fine. 
Sticker or Decal  (1) About 3/4" in diameter. 
Masonite  One rectangle of 1/8"thick Masonite board about 3" x 4" (1/4" thick is also O.K.) with a 1 1/2" hole drilled in the center; and three pieces about 1" square. 
Teflon  7 pieces, approximately 1"x1" square, and 1/8" thick. Three pieces will be used for the lower Rocker Box bearings and four for the Cradle Board bearings. 
Furring nails  (4) Four 
Glue  White glue works fine. 
Cardboard  The back of a cardboard breakfast ceral box works nicely. 
Telescope Diagonal Mirror (1)  See Sources for mirror sources. 
Eyepiece (1) Eyepieces may be purchased from telescope supply houses (see Sources, or you can salvage one out of an old pair of 7 x 35 binoculars (binoculars should be labeled "fully coated optics".) 
  • Hammer 
  • Drill and Bits 
  • Compass 
  • Nail Set 
  • Awl (Woodworking tool for making holes in wood and leather) 
  • Saw (Table-Saw is helpful but not essential) 
  • Tape Measure 
  • Carpenterís Square (helpful but not essential) 
  • Screwdrivers 
  • Crescent Wrench 
  • Hole cutter or 1 1/2"diameter doorhandle drill bit. 
Page 4 
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