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Mittag55
member
Reged: 10/31/08
Posts: 62
Loc: West Amboy, NY
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Has anyone taken the OTA out of the forks, or know how they are held on..been thinking of using mine for a guidescope but don't wish toa trash it ot the forks in the process. I can't find any exploded views of the guts...any help would be appreciated..negative views also..it's a great little scope but sits in the closet most of the time now...figured to put it to use on a dual mount with my refractor.
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brianb11213
Carpal Tunnel
Reged: 02/25/09
Posts: 1961
Loc: 55.215N 6.554W
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Quote:
Has anyone taken the OTA out of the forks, or know how they are held on..
Best thing to do with an ETX, the optics are excellent but the mount isn't.
Two hex bolts at the rear end each side. Ease the cheek pieces apart slightly to clear to locating lugs & slide the OTA out.
Reversing is significantly more awkward but reasonably feasible.
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Arthur Dent
Galactic Hitch-Hiker
Reged: 10/23/08
Posts: 1150
Loc: South Yorkshire, UK
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Hi there
To add to brian's comment, the forks are quite stiff and, being made of plastic, you have to be careful prising them apart.
When I removed the OTA from the forks (just out of curiosity I might add), I was very nervous that one (or both) forks would break, you have to use that much force. However, all was well.
I have to disagree with brian's comment about re-installation though. I found that it was a breeze.
Don't forget, however, that the focusing control which passes through the rear cell must be removed as it will not allow the OTA to be pulled forwards.
There are some photos and a brief description (from Mike Weasner's Mighty ETX Site) LINK HERE (scroll towards the bottom of the page btw)
HTH
Art
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If I like it, the wife says that we can't afford it!
=======================================================
Meade ETX105 (a nice "Grab & Go" scope) & Celestron NexStar 6SE with Bob's Knobs.
Various EP's from 6mm to 26mm, a 2x Barlow, 2" diagonal and 7Ah PowerTank.
MRF and Antares 8x50 RACI finder scope - both for the 6SE's OTA, whilst the ETX gets a plain RDF.
Canon EOS 400D DSLR (un-modded) and SPC900 webcam. Finally climbing the AP Learning Curve!
Edited by Arthur Dent (06/13/09 08:58 AM)
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JT5
professor emeritus
Reged: 11/08/07
Posts: 564
Loc: Ozarks of Missouri
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Have you tried the Mike Weasner's Mighty ETX site? I haven't bothered with the 90 but there is lots of info on my ETX 125PE.
John
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My wife shares my love of the night skies and tolerates all of my other hobbies.
Televue Pronto w/Starbeam pointer and Televue tripod
Meade 2045D, ETX-125PE, 12" Lightbridge
Celestron: 7Amp PowerTank, 15X70mm binoculars
Meade, Swan and Televue Lenses (33, 26, 20, 15 & 9mm), Televue Barlow
Catsperch Observing Chair
Member: Astronomical Society of Eastern Missouri
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Arthur Dent
Galactic Hitch-Hiker
Reged: 10/23/08
Posts: 1150
Loc: South Yorkshire, UK
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John, the link in my post above yours was to Mike Weasner's site - specifically disassembly of the OTA from the fork arm. I've now edited the post to make that clear. Thanks.
Good idea to mention Mike's site specifically though.
Art
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If I like it, the wife says that we can't afford it!
=======================================================
Meade ETX105 (a nice "Grab & Go" scope) & Celestron NexStar 6SE with Bob's Knobs.
Various EP's from 6mm to 26mm, a 2x Barlow, 2" diagonal and 7Ah PowerTank.
MRF and Antares 8x50 RACI finder scope - both for the 6SE's OTA, whilst the ETX gets a plain RDF.
Canon EOS 400D DSLR (un-modded) and SPC900 webcam. Finally climbing the AP Learning Curve!
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dengwer
super member
Reged: 02/14/06
Posts: 153
Loc: Texas
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I removed the bottom cover and accessed screws that held the arms to the base. Once the arms were removed from the base the whole tube with arms are free and the arms just slide off with no pressure.
David
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ETX125AT
Wife's ETX90RA
Orion Ultra-View 10x50
Meade 12" Lightbridge Deluxe
coronado PST
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Mittag55
member
Reged: 10/31/08
Posts: 62
Loc: West Amboy, NY
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Thanks all..looks fairly straight forward to do..i feel better about it now...LOL This was my first scope and i really like it, and would like to hang on to it.
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BlackCoffee
newbie
Reged: 07/10/09
Posts: 2
Loc: Crested Butte, CO, USA
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dengwer,
I like your approach best. How did you remove the bottom cover? I have an ETX-90EC.
thanks,
scott
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dengwer
super member
Reged: 02/14/06
Posts: 153
Loc: Texas
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scott,
The RA model has three phillips screws on the bottom plate. It's straight forward. Yours may be covered by rubber feet which must be pulled off to access the screws. Then again I don't know how the EC model is assembled.
David
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ETX125AT
Wife's ETX90RA
Orion Ultra-View 10x50
Meade 12" Lightbridge Deluxe
coronado PST
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BlackCoffee
newbie
Reged: 07/10/09
Posts: 2
Loc: Crested Butte, CO, USA
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Yes, under the rubber feet are the three screws. I ended up removing 2.5 screws (I left one screw partially in place) on one support and that was enough to free up the OTA. Strangely, the spindle/drive side will not detach from the OTA. Maybe I need a hammer,, but for my purposes (spotting scope/digiscoping) it will work.
thanks,
Scott
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