We're going to assume some rudimentary carpentry skills. Be sure and double check measurements against the tube you will be using to insure it will fit in the cradle properly.
This is what you'll need in the way of materials:
- Ten inch Newtonian reflector telescope (12 inch outer diameter tube)
- 4 x 8 foot sheet of half inch plywood
- Two unwanted phonograph records
- Glue that will stick to vinyl and wood
- Drill and bits
- Screws - 1 and 2 inch
- ½ inch by 3 inch carriage bolt, washer and nut (wing nut optional).
|There is a matching "ear" on the other side of the tilt box|
Glue and screw the flat disks to the center of opposite sides of the mounting box. Do not put screws all the way through the sides of the tilt box and leave the center of each ear clear for a mounting screw to be added later.
|Side view of the rotating stage|
Glue the bottom of one record, slide it over the lower stage bolt and press firmly against the lower stage and let it dry.
Match up the hole in the second record with the hole in the upper stage and glue it in place and let it set firmly.
Flip the upper stage over so the record side is down and slide it over the bolt and down onto the lower stage so that the records rub together.
Bolt the two stages together. I like to use a wing nut so I can adjust the tension in the field or disassemble the whole thing when transporting it. Adjust the tension on the nut so that the upper stage turns smoothly, but has some friction to keep the stage positioned once you have it where you want it.
|This is what the mount looks like|
complete and attached to the stage
|This version with the tilt|
box in place adds holes in the
sides and front to reduce weight