Last updated: 28 March 2008
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: Dead Clock Drive Board on ETX-90 RA Sent: Thursday, March 27, 2008 05:05:59 From: Babcock, Philip S., IV (firstname.lastname@example.org) I left my batteries in the holder on the clock drive board for over a year, without using the scope, and they leaked. The drive no longer works. The corrosion from the batteries removed a trace or 2 from the board. If I knew where the traces went, I could solder jumpers across the corroded segments. Are there any circuit diagrams available for this 1997 drive board? Does anyone have a photo of a board that shows the traces? Thanks for any info or suggestions. Phil Babcock Westford, MAMike here: Sorry, nothing avallable. I'd take a photo of mine but the circuit board is in a box somewhere as a result of my recent move. Perhaps someone else can get a photo.
Subject: ETX-90EC No longer supported? (Need Right Tube Adapter) Sent: Wednesday, March 26, 2008 14:54:10 From: Spencer, Darrell (DSpencer@sjm.com) I just spoke with a representative from Meade. I was looking for a replacement for the ubiquitous Right Tube Adapter. I'm told they no longer support the "EC" platform but would kindly upgrade me to the "PE". Indeed. So, have I missed an alternative Vertical Lock repair in the generous and varied archives on this site? I've been lurking here for a number of years since I purchased and ETX-70. (I also own Orion 120ST and XT10i scopes, but (like you) find the ETX series my most used instruments. Please help as this was serious enough for me to post for the 1st time even after having "lurked" for years. Thanks Darrell SpencerMike here: Scope Logic (formerly Astro Hut) has (or had anyway) a Right Tube Adapter Replacement for the ETX-90EC/AT. Try them (link on the Astronomy Links page). Or you might try the repair yourself; see the Helpful Information: Telescope Tech Tips page.
Wow! Thanks for the quick response, sir! I sincerely appreciate the leads and will get back with you on my results.
Subject: EYX90RA search Sent: Wednesday, March 26, 2008 14:43:31 From: Bert Denovan (email@example.com) I had the original ETX(RA) and traded it for the later model with goto. Later traded that for the precursor to the LX90 and now have one of the earlier 8" LX90s. But its not easy to use in the fluky weather that we have in Tasmania. By that I mean that it can be cloudy all day and later at night it may clear. So I will not have set the LX90 up thinking that it will be a cloudy night and now wish that I had a smaller, cheap and easy to use scope that I could just pull out of the back shed and point and begin viewing. Don't like Dobs and am wary of the cheaper models of refractors and just wish that I had my old RA again. That would be perfect for my wants - keeping the LX90 for dedicated astronomy nights with a local group. I have seen the odd RA for sale here and there but wonder about the availability of parts and how much terminal wear these old scopes would now have. I would value your opinion on this matter and, if positive, any hints as to where I might be able to get a decent RA now. Cheers! Bert Denovan, St Helens Tasmania, AustraliaMike here: I still use my ETX-90RA (purchased in 1996). Some of the big "warehouse" stores in the USA had some a couple of years back but don't know what stock or where any exist today. But I would suspect there are still some around.
Thanks for the prompt answer, Mike. I will have a look around. Cheers! Bert
Subject: ETX 90RA Conversion Sent: Tuesday, March 11, 2008 19:58:18 From: Thomas Tarter (firstname.lastname@example.org) I hope all is well with you and I hope some progress has been made on the theft of your equipment. As a followup to a previous email a couple months ago, I've got a question I hope you won't mind answering. I have an original ETX 90RA and I want to convert it to Autostar. I've read through the related topics on the ETX & DS TECHNICAL TIPS section on your website. I've seen this mount on eBay http://cgi.ebay.com/Meade-DS-2000-motorized-tripod-mount-with-494- Autostar_W0QQitemZ110232408370QQihZ001QQcategoryZ74926QQssPageNameZWDVWQ QrdZ1QQcmdZViewItem I would like to know your thoughts on using this mount to convert my 90 to an autostar version. It seems the most relevant topic in your website is http://www.weasner.com/etx/techtips/2004/ds-etx90ra.html I'm aware I'd have to make my own adapter, but I think it could be made to work. However, I think the mount I'm seeing was made for a refractor and I'm concerned about balance. I would like to piggyback my DSLR which is quite heavy, hence the concern about balance. I would appreciate any thoughts, tips, or suggestions you might have on the subject. Thanks so much for your time. I appreciate it. Thom Tarter Alexandria, VAMike here: The mount could work for you. As long as you counterweight the telescope and camera you should be OK. Just don't overload the mount too much.
Subject: ETX 90RA Sent: Tuesday, March 11, 2008 13:41:45 From: Doug Pedler (email@example.com) Is it possible to add the full GOTO feature to this older scope? thanks DougMike here: See the FAQ page for info on adding the AutoStar to a non-GOTO ETX. If you want to mount the OTA on a different mount, see the Helpful Information: Telescope Tech Tips page.
Subject: etx base inquiry( newbie) Sent: Tuesday, March 11, 2008 13:22:16 From: Paul Cartmill (firstname.lastname@example.org) i have an older etx astro and am wondering about a computerized drive base.I have noticed a lot of etx 70 for sale quite reasonably priced on ebay. in your experience can i mount my OTA from the 90 on a 70 base, from the photos they appear to be quite similar. i'm hoping to intoduce my kids to the hobby and having a goto maybe the hook i need. frugally yours Paul cartmillMike here: See the Helpful Information: Telescope Tech Tips page. There is an article (or two) on that.
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