August 2002
Astro Chatter
Swap Shop

icon The SwapShop
by Larry Kalinowski

This column is for those who are interested in buying, trading or selling items. Call 586-776-9720 (cometman@mybluelight.com) if you want to put an item for sale or trade in this section of the WASP. The ad will run for six months. The month and year the ad will be removed, is also shown.

FOR SALE. Sound and Video boards for PC computers. Diamond Monster Sound MX300 with support for four speakers, wave table synthesizer and MP3 support, $25. Diamond Viper V770, 4x AGP, 32 MB memory, Riva TNT2 controller, 2D and 3D support, $40. Nvidia Gforce2 Ti Xtasy 5864, 2D & 3D accelerator, 64MB memory, 175 MHz processor speed, AGP bus, $50. 586-776-9720. (2-03).

FOR SALE. Ten inch Dodsonian, F4.5, Orion, full thickness primary. 3/4" birch plywood cell, 3 point with 1 1/2" supporting disk, includes 12 volt muffin fan, no power supply. Orion secondary, 2 1/8in diameter. Four vane aluminum spider and secondary mount. Crayford 2 inch, low profile focuser with 1 1/4 inch adaptor. 12 1/2 inch Sonotube, 54 in. long. 3/4 in. birch plywood trim rings at both top and bottom of tube. Upper trim ring is permanently attached to the tube. Bottom trim ring is removable to facilitate mirror cell removal. Orion 9x50 correct image, right angle finder. 3/4 in. birch, off axis solar mask with 80mm Celestron solar filter. Mask has four attachment bolts to securely mount the mask to the front trim ring. Weight of tube assembly with mirror, secondary assembly and focuser: 50 pounds.

20 inch dia. altitude bearings, 3/4 in. Birch core, Ebony Star laminate. 14 1/4 in. square by 17 in. long tube support box, 3/4 in. birch plywood, uses 8 threaded brass inserts into which 8 1/4-20 hex head cap screws are attached from inside the tube. 22 1/2 in. dia. azimuth bearing. 3/4 in. fir ground board. 3/4 in. birch plywood rocker box structure, 23 in. high to the base of the altitude bearing radius. Ebony Star laminate azimuth bearing surface under rocker box. Virgin teflon bearing pads on both altitude and azimuth axes. Custom Teflon bushings reduce friction around azimuth axis bolt. 3 hockey puck feet under the ground board. Weight of rocker box assembly: 30 pounds.

This is a heavy, rock solid, 10 in. Dob with virtually no vibration. Motions are smooth and spot on, with no annoying "settle down" after making a move or focusing. Designed by an engineer, the eyepiece height, when the tube is verticle, is at the correct height for an average person to peer staright into the eyepiece without need for a step ladder. Conversly, the design height precludes having to bend over excessively when observing objects 30 to 60 degrees above the horizon.

Reason for selling: bought two more scopes....now have three. Price $650 firm. 586-773-8103. (01-03).

FOR SALE. Meade, 16 inch, Dobsonian, mobile cart for transportation, three two inch diameter, wide field, eyepieces. 9.7, 12 and 26 mm focal lengths with Aluminum case, two years old, like new. $950, 810-765-3915. (12-02).


The Warren Astronomical Society Paper
Volume 34, Number 8 August 2002