Cassiopeia Observatory logo
Last updated: 30 September 2010
This page is for user comments and information specific to the Meade ETX-90RA (originally known as the "ETX Astro"). Comments on accessories and feedback items appropriate to other ETX, DSX, and DS models are posted on other pages. If you have any comments, suggestions, questions or answers to questions posed here, e-mail them to me for posting. Please use an appropriate Subject Line on your message per the Site Email Etiquette. Thanks. Remember, tips described on this site may invalidate the warranty on your telescope or accessories. Neither the submitter nor myself are responsible for any damage caused by using any contributed tips.

Subject:	ETX90RA Lubrication Question
Sent:	Thursday, September 30, 2010 11:42:01
From:	Steve Siegel (
I've been reading through your fabulous ETX site, greatly anticipating
my latest purchase, an ETX90RA from Ebay.

The scope came yesterday, and I can't be more pleased. It appears to be
almost new. There is a slight slow-mo RA sticking problem, so I
dissassembled the base to check things out. Amazingly, there is not a
spot of grease on anything! It as dry and clean as if assembled in a
clean room.

So my question is, did this scope somehow miss being lubed at the
factory before being shipped, or are they all like this?

Any help would be much appreciated.
Steve Siegel
Allentown, PA
Mike here: There is some lubrication. But that model is really old and the previous owner may have removed it. Try a very small amount of white lithium grease.


Thanks Mike!

Subject:	Re: ETX 1995 model
Sent:	Thursday, September 23, 2010 13:29:54
From:	dave launder (
thank you very much
we are just bunnies here!

Subject:	ETX 1995 model
Sent:	Thursday, September 23, 2010 02:12:23
From:	dave launder (
hello, we have just bought an ETX which pre-dates? the computer version
but has a PCB and 3 x AA batteries in the base which are obviously meant
to do something.

we are just using it manually but there is obviously more to it than

any help appreciated

best regards,
Mike here: That is the original ETX model, now known as the ETX-90RA. There is a power switch on the bottom of the base to turn on the Right Ascension drive. There is another switch to set Northern or Southern Hemisphere. If you don't have the manual, see this Meade web page:

Feedback Archive

Check the Feedback Archive for previous editions of the ETX-90 User Feedback pages.

Go to the ETX Home Page.

Copyright © 2010 Michael L. Weasner /
Submittals Copyright © 2010 by the Submitter