Last updated: 4 September 2006

This page is for user comments and information specific to the Meade ETX-90RA (originally known as the "ETX Astro"), the ETX-90EC, and the ETX-90AT. Comments on accessories and feedback items appropriate to other ETX 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 and I'll post them. Please use an appropriate Subject Line on your message. Thanks.

Subject:	ETX 90 AT Update
Sent:	Friday, September 1, 2006 09:25:44
From:	Ortega, Iigo (
My name is Iigo. Let see if you can help me.

In 1998, when I was located at the States, I bought a Meade telescope
ETX90 AT. Now I am located at Spain and here is so difficult to get info
about this telescope. I have been told that you are a "guru" on ETX

I what to know if is possible to upgrade my telescope with the
autostart. I have see that actual ETX 90 have it, the autostart.

Please let me know something.
Thanks in advance!!
B. Rgds
Mike here: Since you have the AT model you have the #497 Autostar. It can be upgraded using software from Meade's site ( if you have Windows, using AutostarX or AutostarX (Mac OS X) or Lin_Autostar (Linux) (available from the Helpful Information: AutoStar Info page on my ETX Site). Note that you will need to purchase or make a #505 serial cable (info on making one on the AutoStar Info page). You will also need a RS-232 port on your computer; if it doesn't have one you will need a USB-serial adapter (see the article "AutoStar and USB" on the AutoStar Info page.


Perhaps I have confused you with the nomenclature of the telescope. Let
me explain:

Mi telescope is a 1998 model and do not have the hardware. In telescope
is written ETX 90 (Astronomic Telescope).

The base where it is mount, only have a small DC motor to compensate
earth rotation.

Is any possibility to have the hardware of actual ETX90 and upgrade my
Mike here: See the item "How do I upgrade to an Autostar capable model?" on the FAQ page.


I appreciate your support.
B. Rgds

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