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Question purchasing RCX400

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#1 bananaheim


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Posted 05 February 2013 - 02:39 PM

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!!!

#2 dogeddie


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Posted 06 February 2013 - 03:22 PM

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.

#3 neotesla



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Posted 06 February 2013 - 06:21 PM

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...

#4 thesubwaypusher


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Posted 22 February 2013 - 02:27 PM

Celestron Edge HD.

Seriously, parts and support are difficult to come by for that telescope.

Good luck, Chris

#5 jonbosley


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Posted 28 February 2013 - 04:56 PM

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.

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