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| links mirror mirror cell-movable mirror mount OTA ben@davies.net
SPECIFICATIONS: Optical and mechanical Type: Newtonian Reflector Primary Mirror - 12 7/16" true diameter. (315.9 mm) x 2" thick Bruce Swayze Coating by Galaxy Optics 96% reflective Secondary Mirror - 2.37" (60.2 mm) minor axis 1/10 wave Newport Glass Works Focal length - 74 7/8" (1901.8 mm) Focal Ratio - 6.02 Focuser - JMI 2" NGF DX2 Spider - 4 vane Gary Wolanski Eyepieces - 31mm Televue Nagler type 5 42mm field stop 1.27 deg TFOV - 22 mm Nagler type 4 - 6 mm Nagler type 6 Main mirror to secondary - 65.365" (1663.7 mm) Tube inside diameter - 15" (381 mm) Aluminum tubing - 1.5" od 1" id 6061 aluminum Weight of tube and mirror cell without mirror and focuser - 85 lbs
Mechanical Drive Steppers and controller - Mel Bartels Optical encoder controller - David Ek Optical encoder - US Digital s-2 resolution: 8192 tics/rev quadrature
Computers and Software:
Old 486 2 serial ports 50 mhz Scope.exe running in DOS 6.2 Compaq Presario 1210 150 mhz Pentium Guide8.exe running in Windows 95 IBM Thinkpad 1400 500 mhz pentium AIP4WIN and Star 2000 Windows 98 The 486 is connected through its parallel port to Bartels' circuit board. It is connected to EK's encoder board through one serial port and to the Compaq through the other.
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