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Pages: 1 bananaheim newbie Reged: 01/27/13 Question purchasing RCX400       #5663691 - 02/05/13 02:39 PM Edit   Reply   Quote Quick Reply   I have the opportunity to purchase a used RCX400. The current owner says the scope is fine except for a problem with the declanation system which occassionally manifests itself. She says that "Declination axis might require occasional adjustment." The problem caused the scope to shift from side to side between the fork arms. When this happens, the scope makes a thumping sound. She says that the problem is a result of the fork arms getting out of adjustment so that they are too far apart. That gives the OTA some room to move, and when the scope turns to a certain place in the sky, the OTA shifts a little. She says that the RCX400 has a simple screw type of adjustment that allows the spacing to be changed and when you take off the side on one of the fork arms, turn the screw until it is snug, and then close the scope up. What do people think. Does this sound like a big problem or something I can live with? Am I better off with an LX200 or the same size? Thanks!!! Post Extras:       dogeddie sage Reged: 03/26/10 Loc: Wisconsin, USA Re: Question purchasing RCX400 [Re: bananaheim]       #5665501 - 02/06/13 03:22 PM Edit   Reply   Quote Quick Reply   I don't own one of these scopes and am by no means knowledgeable about them. I did a quick scan of that scope manual and did not see any such adjustment. You may want to read it yourself. I have never heard of such a condition as adjusting the shifting between fork arms, as that should be rigid. Myself, I would be wary or ask for her to show you the issue, then re ask here again based on her instructions. Post Extras:       neotesla Pooh-Bah Reged: 11/18/10 Loc: Canada Re: Question purchasing RCX400 [Re: dogeddie]       #5665791 - 02/06/13 06:21 PM Edit   Reply   Quote Quick Reply   The RCX400 were motorized in so many ways that if anything failed you are pretty much dead in the water. If it is a problem scope, move on... Post Extras:       thesubwaypusher scholastic sledgehammer Reged: 07/08/04 Loc: New York City Re: Question purchasing RCX400 [Re: bananaheim]       #5694854 - 02/22/13 02:27 PM Edit   Reply   Quote Quick Reply   Celestron Edge HD. Seriously, parts and support are difficult to come by for that telescope. Good luck, Chris Post Extras:       jonbosley professor emeritus Reged: 10/19/05 Loc: Texas Re: Question purchasing RCX400 [Re: thesubwaypusher]       #5705739 - 02/28/13 04:56 PM Edit   Reply   Quote Quick Reply   The Dec is slipping (an will most likely continue to slip), probable because it was out of balance at some stage. Peterson Engineering has a very easy fix for it here: web page RCX400 were some of the best scopes produced, Meade's 20" top of the line scope is still an RCX400-says something. Post Extras:       Pages: 1

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