| 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".) |