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Meade LXD 55 10"

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#1 Driven1

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Posted 05 December 2012 - 08:44 AM

Found an awesome deal on a Meade LXD 10". OTA only though. Anyone have any experience with the quality of the OTA and any quirks it might have? I already know about the issues with the mounts that came with these originally. I'm thinking about making a Dob style mount for it until I can find a good mount for it. At the price that the seller's asking, I think this would be hard to pass up. Brand new. Never been used.

#2 jgraham

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Posted 05 December 2012 - 10:53 AM

That's a great OTA! I have the SN10's little sibling, the SN6. Replacing the focusser is a popular option, though I still use the stock focuser on both of mine. Also, plan on making a dew shield.

Have fun!

#3 Driven1

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Posted 05 December 2012 - 06:15 PM

Thanks Mr. Graham. Anyone else?

#4 Dwight J

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Posted 05 December 2012 - 08:31 PM

I'm doing exactly that with my LXD55 10" SN - making it into a dobsonian. The optics are great and, if you have one with the UHTC coatings, perform very well on deep sky objects. Best view I have had of M 31 was with this OTA and a 16mm Nagler. They perform okay on the planets as well if you spend some time on collimation which they hold very well. I replaced the stock focuser with a Moonlight kit made for them and that was the best thing I could have done. The stock focuser in a R&P and shows a lot of image shift when changing directions. Aside from the focuser, the only other issue I have is that the paint on my tube is cracking and coming off in big thick flakes. And, oh yes, you will need a dew cap!

#5 Driven1

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Posted 05 December 2012 - 09:35 PM

Thanks guys! Based on your replies, a little research on my own, and an unbelievable price for a 10", I snagged it. Not sure if it has UHTC or not. But at this price I'm not gonna worry about it. Found it on Craigslist. I know you're curious. ;) $130!!! Will be picking it up Sunday.

#6 Dwight J

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Posted 05 December 2012 - 09:54 PM

You stole it at that price!

#7 Driven1

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Posted 05 December 2012 - 10:29 PM

I "almost" feel ashamed. ;)

#8 Mokudo48

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Posted 09 December 2012 - 07:53 AM

I, likewise, recently picked up an SN-10 OTA at a similarly rediculous price and I, too, am considering making a Dobsonian mount. An appropriately sized GEM is just prohibitively expensive. I'd really appreciate coordinating with you both on dimensions, specs, and materials. I cautiously mount it on a CG-4 that I purchased for an SN-6, which is a great pairing, but the SN-10 is like an elephant on a mouse.

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Luca

#9 panhard

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Posted 09 December 2012 - 09:56 AM

Luca Welcome to our site. :band: :band: :grouphug: :dob: I hope you get the information you need here

#10 Geo557

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Posted 09 December 2012 - 11:03 AM

An SN10 for $130? A real steal for sure.

#11 SeattleScott

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Posted 09 December 2012 - 11:30 AM

I had the 8" version. You wouldn't want to use it on the original LXD55 mount but the LXD75 or CG5 would do a decent job with it (of course either option will cost you considerably more than the telescope). The shorter tube and more central balance point help with stability compared to other 10" reflectors. However there is still the tube rotation issue, which the Dob mount would solve. Given these scopes are best suited for low power, wide field viewing, a Dob mount makes a lot of sense. Just keep in mind the tube is shorter than most 10" Dob tubes so you may want to compensate by making the Dob mount taller to raise the viewing position. But the more you raise the mount, the less stable it will be I would think.

When figuring the balance point, make sure to put the dew shield on and put an eyepiece in the focuser. And if you can, put an ES 24mm 82* eyepiece in the focuser :) Awesome with that scope.

#12 Driven1

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Posted 09 December 2012 - 09:41 PM

UPDATE: Picked it up today and it is in MINT condition AND it is UHTC! Still can't believe I picked it up at that price. Super freakin' happy camper here!

There's another little part of this story that's gonna twist your brain. Remember it was OTA only? I found out that's because he THREW OUT, yes, as in trash, the mount. He said at 80lbs, it was too heavy to lug around and threw it out. My brain's still reeling from that one!

@Scott - Thanks. As far as the Dob mount design, I'm going to build pretty much as you described with the additional height. I figure a good sturdy base, and wide design should counteract the bulk of this massive OTA. Thanks for the balancing and EP tips!

@Luca - Probably be a little bit before I get to building the mount. I'll start a new thread for that when I get started. And congrats on finding a great deal too!

#13 Startraffic

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Posted 10 December 2012 - 10:01 AM

Driven1,
You get the OFFICIAL "you suck" $130 for an SN10 IS a steal. I'm making a set of "lazy susan" rings for mine. A set of Bob's Knobs will do wonders for ya too.

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#14 Driven1

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Posted 10 December 2012 - 03:21 PM

@ Star traffic - Bwaaaa haaa has ha!!! Got a good laugh. Thanks!

I have a preliminary design worked up for the Dob style or "lazy Susan" mount for it worked up. Just gotta get the materials together.

#15 Driven1

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Posted 10 December 2012 - 09:30 PM

Holy *BLEEP*! Just got the craziest idea of how to turn the mount for this LXD55 I've come up with to a GoTo mount fairly easily. Just don't know if the drive will have enough "oomph" to handle it. I think that if everything moves easy enough and is well balanced, it should work. Here's the idea. Take an iOptron Cube mount and mount it inside by its casing to the rocker box. Reverse the polarity of the RA motor. Connect a "drive shaft" from the bottom of the Cube to the bottom bearing surface so that the torsion drives the RA movement.

Next, connect a 1 to 1 link between the DEC drive and the scope.

The iOptron drives are rated by the amount of weight the drive itself can handle when a Telescope is mounted to its dovetail normally. In this scenario, I believe, I would be removing that limitation from the drive because the weight restriction would be mostly eliminated. This might work for any "Lazy Susan" design. Comments?

#16 Startraffic

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Posted 11 December 2012 - 01:39 PM

Driven1,
I cornfoosed, my rings are for the OTA. I took my 10" SNT off the LXD & put it originally on a G11 now it destined for my HGM-200. The Titan's older brother. It works but the EP winds up in some very inconvenient positions for visual & the stock rings allowed the OTA to slide down in the cradle if they were loose enough to turn the OTA. That changed the balance which the motors didn't like. My solution is a set of rotating rings for the OTA using Lazy Susan's from Rockler IIRC. I've made the 6 inner wedges that will connect the inner rings to the OTA. I just have to make sure the inner radius of the wedge matches the outer radius of the OTA. Those wedges will get screwed to the OTA, then to the inner ring. The outer ring will get 8 wedges set at 90* to each other for mounting dovetails. That's the next step. The final step will be making a brake to hold the rings in place. It will add ~4-5# to the OTA. While I'm at that, I've done a focuser change from the stock to a Moonlite & I'm about to send the mirrors out for recoating. All total I'll probably put $14 billion in a $400 OTA LOL. I really like the 10" SNT, fast but fairly flat because of the corrector plate, big but not too long so it'll fit in an 8ft dome, solid construction so it holds columnation well.

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#17 Driven1

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Posted 11 December 2012 - 04:43 PM

Ah! I see. I'll be doing this to replace the original mount that didn't come with the Scope. Once I get a proper drawing made up, I'll put it up so you can see what I'm up to. WAY easier than trying to describe it. ;)

#18 Driven1

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Posted 11 December 2012 - 06:08 PM

Here's a sketch that will give an idea of what I'll be building for the LDX 55. It also includes the GoTo idea.

Attached Files



#19 Dwight J

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Posted 11 December 2012 - 06:28 PM

Hey Startraffic - try Wilcox rings...easy to make and cheap and they work great without messing with drilling holes in your tube etc. Here is a link: https://astronomytec.../Pages56-57.pdf

#20 Startraffic

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Posted 12 December 2012 - 01:34 PM

Dwight,
I did that with piece of garden hose. That's what convinced me to make a set of rings. I like being able to rotate the OTA in the cradle, but with out having to "muscle" it around, or having the "clamp" "pinching" the OTA. I got the original design concept on a forum somewhere. Close in design to the Antares rings without the 2nd mortgage. I also get the advantage of being able to attach other OTAs' onto the same base plate & connect them together to reduce flexture between them. I've hung a 10" SNT, 6" CR6, & a 90mm Ioptron Guidescope on my G11 for a solar outreach last year. The mount groaned a bit, but once it was balanced it tracked Ok. That's why I'm building the rings, the SNT focuser started out pointing straight up & turning it kept changing the OTA position in the cradle, which messed up the balance, which made the motors overheat & whine, etc. I made a set of the Wilcox rings, but they tended to bind a bit on the scope rings. This year I hope to have the new mounting plate & rings setup for my HGM-200. I don't think that'll be a problem, the HGM is a BEAST! The Titan's older brother, 150Lb+ payload, 100 lb for AP, external encoders built in, Gemini2. If the rings wind being too heavy then I can always mill them down to lighten them. I started really "beefy" (1/2"x3" aluminum bar stock for the wedges & 17" dovetails) with this in mind.

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#21 BigC

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Posted 12 December 2012 - 02:43 PM

"another little part of this story that's gonna twist your brain. Remember it was OTA only? I found out that's because he THREW OUT, yes, as in trash, the mount. He said at 80lbs, it was too heavy to lug around and threw it out. My brain's still reeling from that one!"


Arghhhh!

What fools these mortals be !

He could have sold the mount for another $130.

And you still would have a bragain. My SN10 WITH mount was $500 and I think worth the money.Great UHTC optics.

Contemplating how much perfectly usable stuff is trashed every day by ignorant people is enough to make one give up contemplating!!!

#22 Startraffic

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Posted 13 December 2012 - 07:24 PM

BigC,
Yup I got mine (LXD55 10"SNT) as NOS for $650. The neighbors nicknamed it "That D@Mn3d Coffee Grinder" A Warp belt drive kit, & a AT6RC made it into a very nice combo that my lovely daughter promptly appropriated. I did get a big hug from her though. She & her brother fight over the AT6RC. He's using my old Vixen GP that was overmounted with a 8" R200SS. I nicknamed that one "Spaghetti Legs".

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#23 BigC

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Posted 13 December 2012 - 11:10 PM

You are a very lucky man to have children fighting over astronomical telescopes instead of all the other possibilities.

It is easy to tell is a Meade goto is running.My Nexstars are much quieter than my Meades.

#24 Startraffic

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Posted 14 December 2012 - 01:03 PM

BigC,
Yes it is. Keeps them out of trouble, & they get my "old gear" so I have to upgrade when they appropriate it. I win either way. Makes Christmas & Chanukah easy.

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