I hate spam
sage
Reged: 02/07/04
Posts: 266
Loc: Griffin, GA, USA
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At what height does a base (8” reflector) become too….top heavy?
The base I built for my scope is fine but I built it in a rush and didn’t take height into much consideration and now I find it to be just a little too short. Ideally I would like to raise it up 15 more inches to make the total height ~31”.
However, this is a meade scope so they don’t use the conventional mirror cell like everyone else does and I am planning on replacing is with a real mirror cell to lighten up the scope a bit and make replacing the mirror easer in the future. By doing so it will shift the center of gravity up the ota and thus increasing the height of the base if I want to keep the eyepiece at eyelevel.
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Kevin
Pentax K100D
Celestron 80ED
8" LX200 Classic
Atlas EQ-G
ETX-70AT
Burgess 15x70
Black Knight Bino's
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MMICKELS
Aluminum Knight
Reged: 01/20/04
Posts: 25191
Loc: The Land of Shake and Bake
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Kevin, can you increase the size of the ground board? That would help if it's possible.
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Mark
"The only thing wrong with immortality is that it tends to go on forever."
Herb Caen
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Jim Svetlikov
Carpal Tunnel
Reged: 10/06/03
Posts: 2033
Loc: Crescent Beach
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Increasing the size of the ground board would mean increasing the size of the rocker box if you want to properly transfer the weight to the ground. As the feet of ground board moves outwards from the center, so must the contact points between the ground board and rocker box.
As long as the OTA is balanced on the rocker box, you shouldn't have any issues. Make sure though that the movements are smooth and relatively friction-free. If not, moving the OTA could tip the scope.
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It is better to build a boy than try to mend a man.
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tishovlin
Carpal Tunnel
Reged: 11/11/03
Posts: 1813
Loc: Springfield, Pa
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Jim,
I'm surprised you didn't mention the nice pedestal you built for your Dob. The nice thing about the pedestal is that you can build a nice one like Jim's, or a crude one like mine and it is a detachable fixture that makes the scope more compact when you want to transport it.
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Tim S
C6-RGT
13.1" Truss Dob
Osypowski dual-axis Eq. Platform
15x70 Obies
NP-101
Gibraltar tripod/mount
Losmandy G-11 w/Gemini
I'm headin for Galt's Gulch
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I hate spam
sage
Reged: 02/07/04
Posts: 266
Loc: Griffin, GA, USA
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I thought about a stand like that but decided that I would just prefer to keep things to a minimum, even if it attached to the bottom.
Also, I would have to rebuild my base anyway if I replace the current mirror cell with a real mirror cell.
This is what I had in mind for my new base, only my OTA will likely remain white and the wood will be homemade from a fallen tree from my yard cut with my dads sawmill.
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Kevin
Pentax K100D
Celestron 80ED
8" LX200 Classic
Atlas EQ-G
ETX-70AT
Burgess 15x70
Black Knight Bino's
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Anonymous
Unregistered
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Kevin: Nice woodvork on that scope.
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I hate spam
sage
Reged: 02/07/04
Posts: 266
Loc: Griffin, GA, USA
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I wish I can take creadit but it isnt mine...but I hope to make one much the same.
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Kevin
Pentax K100D
Celestron 80ED
8" LX200 Classic
Atlas EQ-G
ETX-70AT
Burgess 15x70
Black Knight Bino's
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mirage
professor emeritus
Reged: 09/23/04
Posts: 693
Loc: central texas
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"Oh my gosh!"
These words involuntarily just spilled out from my mouth when that image opened. Where did you find it?
That's a beautiful telescope.
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imber stellarum 10x50 binoculars
architectural advisor
friends of the austin planetarium
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Lawrence Sayre
Post Laureate
Reged: 10/16/04
Posts: 3706
Loc: N.E. Ohio
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Wow, that's one of the most beautiful scopes I've ever seen (perhaps the most beautiful)!!!
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My philosophy, in essence, is the concept of man as a moral being, with his own happiness as the moral purpose of his life, with productive achievement as his noblest activity, and reason as his only absolute.
Ayn Rand (in the appendix to 'Atlas Shrugged')
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Jim Svetlikov
Carpal Tunnel
Reged: 10/06/03
Posts: 2033
Loc: Crescent Beach
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That telescope is the unmistakable work of Lee Stock:
http://members.aol.com/comabereni/
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It is better to build a boy than try to mend a man.
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Jim Svetlikov
Carpal Tunnel
Reged: 10/06/03
Posts: 2033
Loc: Crescent Beach
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Or, as Tim suggests, you could build a mount:
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It is better to build a boy than try to mend a man.
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Chris T
super member
Reged: 01/05/05
Posts: 150
Loc: Florida
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Could you post some more views of you observing chair. I'm old fat and out of shape and a good adjustable seat like that looks pretty good to me.
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MMICKELS
Aluminum Knight
Reged: 01/20/04
Posts: 25191
Loc: The Land of Shake and Bake
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Chris for the chair look here.
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Mark
"The only thing wrong with immortality is that it tends to go on forever."
Herb Caen
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