Losmandy G8 equatorial mount, tripod and Model 492 Digital Drive System
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FOR SALE: A Losmandy G8 equatorial mount with tripod and Losmandy Model 492 Digital Drive System. The components are in brand new condition. This was purchased in 2005 and was stored, apparently never used by the owner due to declining health. Includes the hand controller with cable, motor cables and power cable with “cigarette lighter” plug for connecting to an external battery.
I have tested the GM8 head and Model 492 controller and all work as specified. The unit draws 300mA at 12 volts DC while tracking. The motors sound good when slewing at high rate. The white paper labels are sales reference numbers and will be removed when sold. Questions, concerns or detailed photo requests are welcome.
The price is $875.00 plus shipping within the continental US. Cash, Cashier’s check or Paypal please.
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SPECIFICATIONS OF MODEL 492 DIGITAL DUAL AXIS ELECTRONICS* |
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Power Requirements: |
12 Volt D.C., 500 MA* |
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R.A. and DEC. Geared Motors: |
SAIA 48mm Stepper Drive Motors |
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Motor MTBF: |
2.5 years of continuous operation |
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Hand Control: |
Diamond Pattern Push Botton Switches, DEC. & R.A. Reversing, |
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Quartz Tracking Rates: |
Sidereal, Lunar, Solar, King |
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Fine Movement Rates: |
4x, 8x, 16x Sidereal |
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Photo-Guide Setting Rates: |
+-30%, 50%, and 2x Sidereal |
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R.A. Drive Gear Correction: |
user programmable Periodic Error Control |
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DEC. Drive Backlash Correction: |
user programmable Time Variable Correction |
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North/South Hemisphere Operation |
selectable by user |
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SPECIFICATIONS OF GM-8 MOUNT* |
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R.A. Gear Wheel: |
2.8", 180 tooth 7075 T35 aluminum |
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DEC. Gear Wheel: |
2.8", 180 tooth 7075 T35 aluminum |
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DEC. and R.A. Worm gear: |
440C Stainless (54 Rockwell hardness) |
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Worm gear support: |
Dual supported ball bearings |
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Worm gear coupling: |
Oldham |
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Laser Engraved Setting Circles: |
Porter Slip Ring design, 3.5" DEC. and R.A., |
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Right ascension resolution: |
6-minute increments, pointer |
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Declination circle resolution: |
2 degree increments, pointer |
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R.A. Axis Thrust Bearings: |
one 2.1", one 2"; two 1.5" needle |
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DEC. Axis Needle Thrust Bearings: |
one 2.1", one 2"; two 1.5" needle |
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DEC. and R.A. Clutches: |
Slip clutch, variable friction, one knob ea. axis |
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Latitude Tangent Arm range: |
0-64 degrees with polar scope, lower latitude wedge available |
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Azimuth adjustment range: |
+-8.5 degrees |
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Dovetail Saddle Plate: |
Optional "C" or "D" Series |
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Weight of Mount Head |
Approximately 17 lbs. |
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Weight of Field Tripod |
Approximately 15 lbs. |
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Semi-Pier Tripod Height |
36" to 48" |
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Load Capacity: |
Approximately 30 lbs. |
Funding Member
