Michael O. StarGazer Scopes 15" f4.8 Dob, Meade LX200 10" Celestron 8" SCT OTA ARO 150MM Mak 2-5.5" CA Newtonian Reflectors Meade 102MM SCT AstroTelescopes 152MM Explore Scientific 127MM StarGazer Scopes 127MM Orion ED80 2-Backpacker 65MM Lunt 60MM Solar Telescope Coronado PST Double-Stacked Coronado PST CaK 2-Lunt Solar Wedges Ioptron Mini-Tower, Cube Pro, Cube G, Cube A, Celestron NexStar, Meade LXD55 & DS-2000 Astrotrac TT320 and TT320X
Ron NS11GPS Pronto
16" dob Vixen NA140SS
127mm F9 Surplus Shed/Crawmach kit scope
Best of ATM
"The White Zone is for loading or unloading of passengers only. No Astrophotography." Cosmic Acres! Greatest restoration challenge: Tulley and Sons 3" achromat on Altazimuth mount, circa ~late 1820s
Quote:You could make a couple grooves that are round in the areas you want the rings in. But sanding it round after the fact would work too. Just a lot of work!
Living at a dark site, I make scope when I have the inclination. I also do woodworking, cycling and other outdoor activities
Quote:I made the shell in my 15-inch Dob's upper cage from 1-inch beveled wide slats of plywood. I used blue painter's tape to hold them together on the outside, then put glue in the gaps. Then I wrapped the assembly around a mandrel made of wooden disks of the desired inside diameter and used web clamps to hold the slats in place until the glue dried. All you need do is figure out the circumference of the tube on the outside, how many slats you will need and their width, then the angle of the bevel necessary. Use a table saw and push sticks to make the slats. Titebond or any other similiar yellow wood glue is an good choice for bonding the slats together. If you want to stain and varnish the tube, use a solid hardwood such as oak or cherry, and be careful to remove all traces of glue on the outside before staining. Always use an exterior grade polyurethane if you opt to varnish it, because other varnishes, shellacs and lacquers will rapidly degrade and fail.Taras
Quote:John, keep us posted on the birds mouth bit project. I see those bits for sale and I'm always tempted but have not pulled the trigger.Tim; jig and router sounds like the cat's meow.
Quote:Here's one I made in a similar manner to the 10"er's tube, but using solid stock vermillion padauk, resawn on my bandsaw and thickness planed to 1/4" thick. This was to be for a 5" f/5 refractor, but I'm starting to think I should leave the lens in the PVC tube it came in (probably dates to the 50's or 60's).-Tim.
--------------------- --------------------- "Nothing exists but atoms and empty space. Everything else is opinion." Titus Lucretius Carus 99-55 B.C.
14" f/4.8 Obsession Clone w/ ServoCat/ArgoNavis Apogee RA-88 Binocs
Quote:I can only think of one question here...why on earth would you want to make the tube for a telescope out of a material so susceptible to movement with changes in humidity?