25 September 2005: a view of the 12" sonotube sitting in the pier hole. It is an inexpensive option that saves time and provides professional results. Shipping Dimensions: 48.50 H x 12.00 W x 12.00 D. Shipping Weight: 3.5 lbs. The tube has been leveled and is sitting on 4 concrete blocks. Please call or visit your local Home Depot store for pricing. MIRROR DIAMETERSIZE: OUTSIDE DIA. 1. Asked by psychicvoice January 22, 2016. Asked by Jordan January 7, 2018. Richard Berry in his "Build your own telescope" book recommends using a reinforcing ring of ply at top and bottom of the tube. 1. where do i gte the cardborad roll concrete form tubes? You, too, can avoid astronomical costs by watching stars through a tricked-out cardboard tube. SONOTUBES - TELESCOPE TUBES (APPROXIMATE SIZES) Description. Dimensions: 4' long. ... Hard paper is indeed "hard paper", however, has nothing to do with the "Sonotubes" made of wrapped cardboard which are used by some U.S. or chinese suplliers. OF TUBE: WALL THICKNESS: LENGTH: EST. What is the current pricing of this sonotube? The Sonotube Concrete Form Tubes are made of lightweight material designed for pouring footings, round columns and piers. A pier is also the first step in a real backyard observatory, build the pier first, then a building around it. Telescope tubes made of hard-paper. I know, we ATM’s usually use sonotube for telescope tubes, but this is what it is really meant to do, cast concrete. The telescope pier will eventually bolt up to the threaded rod. The american Sonotube is finished with wax or other coatings so that concrete does not stick to it - removing that coating is a big pain, so if you can source an uncoated tube that would make the job a lot easier. Answer. This assembly will be inserted into the 12" sonotube after it is filled with concrete. A few bags of concrete, a little rebar and a sonotube will do the job. A view of the 3/4" threaded rod and the stud alignment plate. If you want to build a telescope yourself, you'll soon be on the lookout for a suitable tube. PM builds one and speaks to John Dobson, the man behind the plans, about the joys of … Answer. OF TUBE: INSIDE DIA.

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