Last updated: 31 January 2003
This page is for user comments and information specific to the Meade ETX-90RA (originally known as the "ETX Astro") and the ETX-90EC. 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:	A couple of "newbie" ETX90 questions
Sent:	Friday, January 31, 2003 9:18:19
From: (Hill, David)
Question #1

I have an ETX90EC with an Autostar that is at firmware revision 2.1ek. I
noticed that there are newer revisions of the Autostar firmware. Is this
a good version to use or would I be well advised to update my software?

Question #2

I have trained and calibrated my ETX90EC. I notice that at slew speed 3
that it takes about 10 seconds of pressing the button before noticeable
movement occurs (in either the "alt" or "az" directions). Is this normal
for the "3" setting? If not, would changing the alt and az percentages
(currently at 15% and 15%) help any?

Thanks for any help you can give me!

Mike here: First off, I would definitely upgrade to the current version. Once you do see if the backlash is still present. I would suggest doing a RESET, CALIBRATE, TRAIN sequence following the upgrade to clear out any bogus settings.
Subject:	O-lll filters
Sent:	Friday, January 31, 2003 6:02:23
From: (jim abbey)
I posted on the group but got no reply so I will ask you. I  want  to
see  if anyone has had any luck with an O-lll  filter on there ETX 90s I
finally got clear sky s here in  Jacksonville Florida and I got to use 
this filter> It  made the Orion nebula more detailed but not much ,the
field around it  was darker and stars were sharper but the brightness
was down a bit. The  Ring nebula came  into view and I could for  the
first time make out  the ring structure even though it was kind of ,dim
at around 138x with a 9mm  MA the 26mm plossl  was small but I could
just make out the ring.
Mike here: Check out the Accessory Reviews - Filters page.
Subject:	meade 
Sent:	Thursday, January 30, 2003 22:05:13
From: (mike szaroz)
i am currently looking to invest my money into a telescope, i have been
looking at the meade etx90ec for awhile and not haveing much luck with
telescopes would like to have your info on which is a good beginner
scope . of coarse i have high expectations due to the lack of more
direct info , i would just like to now the basics like what can i seen
outside our solar system and with what scope, and what lens i would need
to seen these objects incolor . i have looked on the net and as for as i
can tell the images with the greatest detail would bee the moon . i have
looked into the etx90ec because it is portable cheap and very effective
but can it live up to my expectations can i actually see  outside
our solar system with it. i also know the in order to get a quality pic
exposure time is required i just want to view with the naked eye

thank you for your time :<
Mike here: Check out the User Observations page for some indication of what you can see.
Subject:	Knob sticking
Sent:	Thursday, January 30, 2003 4:27:07
Hi, I was wondering if you could help me.

I have a ETX 90 RA and when i turn the knob to move the scope left or
right the knob will not move smoothly. It seems to be sticking which
makes it difficult to actually get what im looking for in sight and also
hard to follow planets etc.

Please can you help me


Daniel Steele
Mike here: See the article "ETX-90RA "sticky" R.A. movement fix" on the Telescope Tech Tips page.
Subject:	Well, this 90EC seems to be better.
Sent:	Sunday, January 19, 2003 12:12:53
Thanks for the info you have been giving me, this is my first Mak (not
to mention Meade) and Im not very familiar with how it is supposed to
perform.  Anyways, the new one that I got from the store seems to be
fine. I just managed to get the controller out of polar mode. What
happened was somehow the controller was not only in Northern hemisphere
polar mode right out of the box, but for some reason the siderail rate
had been increased by like 40X, so I had to press a button about 8 times
to back it out so I could turn off the mode all together.  This is yet
another thing that meade should include in their troubleshooting section
of the instructions.  I do however have a few minor complaints.  On this
one the focus knob is far "tighter" than the last 3 scopes that I have
had to return. At times it even seems to be stuck and needs to be really
turned hard to budge. Although it seems to be getting better. Also, I
have a quick question for you. I noticed that there is small amounts of
debris (some dust and small filamentous structers) clinging to the
inside of the optical tube.  Is this unusual and could it cause
distortion? I'm sorry for bothering you, it just seems to me that you
know alot more than the people I have talked to at meade.
Thanks alot,
Mike here: The focus mechanism will probably loosen up with use. If it doesn't then it is probably binding some place. As to the "debris", it won't cause any problem as long as it is on the side of the tube.


Once again, thanks for the info! I am pleased to announce that the
autostar worked perfectly tonight withouta single glitch. I went from
having to realign every 20-30 minutes to not having to realign all
night. Now I just need to set my dec ring to actually represent where
the scope is level.  When the scope is level the declination ring reads
-4 degrees, Not zero. I assume this is easy to fix and will refer to
your tec tips page for help. Thanks again.
Mike here: See the FAQ page for the DEC setting circle info.
Subject:	ETX90 Declination Motor doesn't run
Sent:	Friday, January 17, 2003 18:37:44
From: (bossert)
My ETX90 is out of Warrantee and the motor that slews the telescope up
and down (dec) is not running (totally quiet or dead).  The motor (same
motor?) to slew the telescope abound (RA) works fine.

I'm using new batteries.  This problem happens when I use the Autostar
(it slews to the RA position, but Slewing to the Dec is quiet/dead and
lasts forever). and when I use the manual controller (the left and right
arrows move the scope, but the up and down arrows result in  quiet and
no re-action)

This is the second time I've had this problem.  First time, I was inside
the warrantee period and I was given replacement scope from the retail
place I purchased it from.

Do you know of anything I can do?  Or, is it something I have to mail to
a Meade repair center?

Mike here: If the motor is not running then a wire has likely been cut. You have three choices: try to repair it yourself, contact Dr. Clay Sherrod for a Supercharge, or contact Meade. If you want to try the first, you will have to find the location of the severed connection, assuming that is even the problem.
Subject:	ETX90 on ETX70-tripod
Sent:	Friday, January 17, 2003 8:58:00
From: (Matthias Heid)
two weeks ago I bought an ETX90-EC for travelling. I donot have a tripod
for it but can get an ETX70-tripod very cheaply.
1. Is it possible to mount my ETX90 on it?
2. Does it make sense, is it stable enough? (It is just my scope for
travelling. For serious obeserving I have got my LX90).
Thank you
Matthias Heid
Hamburg, Germany

Subject:	Right dec knob on ETX90
Sent:	Monday, January 13, 2003 18:56:38
From: (Chris Cooper)
I have a problem with my ETX90. When you go to tighten the knob it just
will not do up. I have taken the right arm apart and the problem seems
to be the small nut in the arm has come loose. I have tried glueing it
back in but it will not hold. The scope is out of warranty and I dont
live in the USA to ring up Meade. Will I need a whole new arm support or
is there some other part I could get that would fix the problem.

Thank You 
Mike here: Sounds like the Right Tube Adapter has failed. This is a free part from Meade. Perhaps your dealer could get you a replacement. Lacking that, see the article "ETX Hints, Tips, Projects, & Products" on the Telescope Tech Tips page and then select "ETX/EC Tune-Up Page ". Near the end is a tip on repairing it.

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