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Meade 2045

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#1 SATMAN

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Posted 18 March 2012 - 07:25 PM

Just picked up a Meade 2045 on the bay for peanuts , in excellent condition owner star tested optics appear to be good . Will post pictures and a review when recieved . It's an older model with a AC drive and coated corrector. :grin:

#2 amicus sidera

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Posted 18 March 2012 - 07:56 PM

Congratulations on the new acquisition! I have a 2045D - it's an excellent little instrument, and optically near-perfect. The corrector plate and secondary on these 'scopes need to be in precise alignment for optimum performance... many came from Meade without being properly oriented, it seems. The critical factor is ascertaining that the secondary is centered in the optical train, with relative rotational positioning being next in importance.

Align it well, and it may reward you with tack-sharp views, in the vein of a Questar 3.5, but with slightly higher resolution and brighter images.

#3 SATMAN

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Posted 18 March 2012 - 09:37 PM

After fixing a couple of C90 astro Orange tube models I figured i'd take a chance with this . With a little bit of patience much can be achieved with these older smaller scopes. They perform suprisingly well once cleaned up and collminated. And they are fun to observe with!

#4 Bonco

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Posted 19 March 2012 - 03:51 PM

I have the original 2045 and its a neat clean little package. As Satman said if collimated properly she performs well. I use mine primarilly as a spotting scope and white light solar observing. I have a full aperture thousand oaks filter that works great. Used this scope for the last Venus transit and will use it again this year for the same event.
Bill

#5 SATMAN

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Posted 19 March 2012 - 05:59 PM

Bill that was my reasoning for this purchase I also have a Thousand Oaks full aperture filter I purchased back in the 90's . Wanted a scope I could take to work for the Venus transit . I would not even consider taking my Questar. And for the price I could not go wrong it was even less than a TV radian! These under appreciated small scopes Meade 2045, C-90 Astro, Lomo astele 95 etc. are just neat to observe with! And they don't break you back setting up! When received pictures will follow, it's good to know my friends here can help me if I run into difficulties collminating the meade if it is required. :jump: :grin:

#6 Jae

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Posted 19 March 2012 - 09:02 PM

On 3 separate 2045's, I've centered and rotated the secondary until the artificial star images became round both in and outside focus. Then the soft images got sharp.

Satman - we are here to help any way we can :cool:

#7 amicus sidera

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Posted 19 March 2012 - 09:06 PM

(snip)...it's good to know my friends here can help me if I run into difficulties collminating the meade if it is required. :jump: :grin:


That's what we're here for! :grin:

#8 tim53

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Posted 19 March 2012 - 09:34 PM

These are really nifty scopes. My LX3 didn't come with the case, so I bought a Harbor Freight toolbox that it fits. Now I can take it on flights with me. I didn't bring it to Houston with me because it's supposed to rain all week while I'm here.
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-Tim.

#9 GlennLeDrew

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Posted 19 March 2012 - 10:39 PM

I once owned the LX-3 back in '86. This was a year after obtaining a B&L 4000. I noticed that the Meade employed a lens in conjunction with and up against the secondary mirror. It's location of course meant that light passed through it twice. It had a very subtle, basic AR coating of the palest blue, and I suspect it did cause a loss of contrast and image brightness. Moreover, I could never get as sharp an image as the B&L delivered. As a result, the Meade served mainly as a proratable platform for piggyback astrophotography.

When you receive yours, could you peer up into the rear end and ascertain the presence (or not) of a lens in the secondary baffle. I'm still not sure if my scope was something of an anomaly, in spite of the fact that it was an f/10 astro OTA, and not specified as a telephoto lens.

#10 tim53

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Posted 19 March 2012 - 11:14 PM

Glenn:

My 2045 says "Schmidt Cassegrain" around the corrector, but the spotter I have says "mirror lens" and is a Klevstov configuration, not an SCT.

-Tim.

#11 GlennLeDrew

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Posted 19 March 2012 - 11:34 PM

Tim,
Is the "mirror lens" also f/10? My memory is likely faulty after a quarter century (Lordy, it sounds so long ago when I put it that way!), but I really seem to recall it being the "Schmidt Cassegrain" variant. And would the mirror lens have been sold as the LX-3 equatorially-mounted system? I did purchase it new from an astro shop in Calgary.

#12 tim53

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Posted 20 March 2012 - 06:49 AM

Hi Glenn:

My Mirror Lens is identical in outward appearances to my 2045 SCT. I didn't believe when someone on here told me that I would find a doublet corrector "in front of" the secondary (really, one element aluminized on one side), until I took it apart.

I *think* I did the same with the SCT and found it was indeed a mirror-only secondary, but it's been a year or so and I don't remember for certain. It's easy enough to take these apart and put them back together, though.

I'm surprised that they would put the mirror lens on the LX-3 mount. Mine came as a spotter in the smaller case with eyepieces, visual back, and I think a camera adapter - and of course the tripod adapter and a finder. I bought it from the Meade booth after the post-Halley deals at RTMC in 1986 or 87. The 2045/LX3 I bought in the past few years.

To my knowledge, these were built entirely in Japan. There was no assembly at Meade in Costa Mesa.

I was working at Meade in 1979 when I "accidentally" saw prototypes of the 4 and 8" SCTs in a storeroom at the Costa Mesa facility. One of the 4" prototypes showed up here a year or two ago. They had purple tubes, rather than blue, which is how I recognized it as a prototype. But I don't know when the mirror lens versions were made with respect to the SCTs.

-Tim.

-Tim.

#13 Jae

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Posted 20 March 2012 - 08:24 AM

And would the mirror lens have been sold as the LX-3 equatorially-mounted system? I did purchase it new from an astro shop in Calgary.


Wow, while it could have been an honest mistake at the factory or they just ran out of the ota so substituted a spotter, I've seen bizarre things.

It could have also been swapped out at the dealer by someone wanting a non-spotter version of a spotter, I suppose. One time I couldn't believe what I saw, I bought a HD DVD player (1080P) and the guts were swapped with an older non-1080P version.....

#14 SATMAN

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Posted 24 March 2012 - 03:00 PM

Well it arrived today I will post some pictures soon , unit appeared to be clean the optics are in good condition I haven't star tested them yet .
The main problem with the instrument is the RA shaft gear sheared off at the clock drive some time ago, :bawling: I have the gear and I think I can punch out the broken pin from the spur gear with out damaging it, the clock drive shaft side appears to be more difficult it broke flush with the clock drive coupler shaft . It has to be drilled out I don't think this is easy or possible. Is there any way to modify the base so the manual slow motions do work? With out the tension on the drive gear eveything spins freely. Maybe I can create some kind of friction clutch with a a nylon bolt and nut untill I can replace the clock drive or drill out the shaft with a 1/32" diameter drill.

#15 SATMAN

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Posted 24 March 2012 - 03:47 PM

Artifical star test optics Great ! symmetrical inside and out side of focus I got lucky well collminated ! Tested the motor without the gear, motor is Dead.
I think I can get the manual slow motions working until I can find a replacement drive motor . 3/8" diameter nylon bolt and nut bearing on the drive gear , non destructive and it works. It's not visible from outside the base casing As a bonus the base fits my Tri-stand.
For $30.00 how can you go wrong? :grin:

#16 amicus sidera

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Posted 24 March 2012 - 10:02 PM

Sorry to hear that the drive has difficulties, but the star test sounds great! Yes, for $30 you got a great deal.

Any chance you can post a few pictures of the broken drive and motor? There might be a CNer who has a spare motor they'd be willing to part with, and most likely the rest can be cobbled together.

#17 SATMAN

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Posted 25 March 2012 - 09:40 AM

nice clean unit only dust on the exterior of the corrector

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#18 SATMAN

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Posted 25 March 2012 - 09:41 AM

another

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#19 SATMAN

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Posted 25 March 2012 - 09:42 AM

back view unit is in very good condition but one problem next photo

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#20 SATMAN

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Posted 25 March 2012 - 09:43 AM

it seems likly the previous owner moved the fork mounts with the RA lock engaged

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#21 SATMAN

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Posted 25 March 2012 - 09:45 AM

close up of motor it must have been an extreme amount of force to shear this off the main RA gear appears to be undamaged .

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#22 SATMAN

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Posted 25 March 2012 - 10:01 AM

Option #1 fix with a new drive 1RPM and spur gear or insert a 1/4" -3/8" nylon bolt into the clock drive hole bearing on the aluminum RA gear to prevent it from moving, this will allow use with the manual RA controls with the lock on / off and is non-destructive , the optics on this unit are good well worth what i paid for it !
Option #2 De-fork the mount and use it on my Vixen Porta mount like my LOMO Astelle 94. Question How do you remove the OTA on these older Meades? (this model has a camera tripod adapter base with a 1/20 thread in it)

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#23 tim53

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Posted 25 March 2012 - 11:22 AM

I bet you could find a stock replacement for the motor (which is probably some other odd ratio besides 1rpm, like 1/10th). People here often refer folks to a website with used or old stock parts, but the name is escaping me at the moment...

I think you just remove the 2 allen bolts on either side of the cell to take the OTA out of the forks. You should also loosen the bolts on one fork arm to allow removal without scratching the cell. but I cant remember if these are easy to reach or not.

-Tim.

#24 SATMAN

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Posted 25 March 2012 - 12:43 PM

Tim,
I managed to get the Manual Controls working by inserting in the clock Drive holes a 1/4" nylon bolt ,washer and nut to act as a thrust bearing on the main drive gear . the slow motions now work great and there is just enough tension to move the scope with the RA lock off, like when the motor is there but you don't want to use it. I removed the plug Receptacle and the motor for safety reasons . easy fix and does not alter the scope .

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#25 SATMAN

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Posted 25 March 2012 - 12:44 PM

other side, Rainy weekend here at least I did something productively :lol:

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