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Craigslist, ebay and other Vintage Telescope Finds

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#7026 terraclarke

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Posted 17 April 2019 - 09:26 PM

That’s a truly wonderful long refractor! Congratulations Chuck. waytogo.gif waytogo.gif


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#7027 Chuck Hards

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Posted 17 April 2019 - 09:28 PM

I found a pair of what I think are Vixen rings, pretty close fit but I'll have to re-line them with thicker felt. I found a Losmandy plate that will work well.  Stay tuned.


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#7028 ScottAstroNut

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Posted 17 April 2019 - 10:03 PM

That's a really fine-looking long-focus refractor! Too bad Crawmach isn't in business any more. He made some really great stuff. 

 

Can't wait to hear an observing report once you have had a chance to try out the scope. I bet the views will be fantastic!


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#7029 Kasmos

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Posted 17 April 2019 - 10:10 PM

"it's so nice getting a scope that needs no attention and is ready for action immediately" waytogo.gif 

 

Just the other day I was thinking about that concept... while working on one.  undecided.gif  


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#7030 Chuck Hards

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Posted 17 April 2019 - 10:20 PM

Thanks everyone.  I did get a chance to use it on the mountains some 8 to 10 miles distant, before sundown.  Detail was incredible, the daytime view was sharp and contrasty.  I could have seen a moose easily had one been on the mountainside.

 

Buck up, Chris.  Most of my finds have always been those in need of some love, and it's pretty darn satisfying bringing them back from the brink, so they can give amazing views for another three-quarters of a century.  But yep, it is nice to get one in excellent condition just once in a while.  Chuck built this one from components so it's actually almost brand-new, and he's taken good care of his collection over the years anyway.

 

Here are the rings I found on my shelves, and the Losmandy plate I'll attach them to.  If anyone can positively ID the rings, please post.  I think I'll make a top bridge plate from 1/4" aluminum, since there are bolt holes there for the purpose.

 

006.jpg

 

 


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#7031 Chuck Hards

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Posted 18 April 2019 - 07:45 AM

I've decided to just use those rings to get me up and running but want to keep looking for a fully hinged set.  These will have to stay on the tube for a while, once installed.  



#7032 Geo31

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Posted 18 April 2019 - 07:46 AM

OR, you could attach a carrying handle.  I'm surprised this isn't done more often.



#7033 Chuck Hards

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Posted 18 April 2019 - 07:51 AM

OR, you could attach a carrying handle.  I'm surprised this isn't done more often.

I mentioned that I would add a top bridge plate, this could serve double-duty as a mid-tube handle.   I did this on my home-made 6" Dob.

 

I just don't want to have to pull the focuser off just to attach or remove the rings, then have to re-collimate the focuser every time.  Might have to remove the finder bracket shoe as well.  



#7034 Chuck Hards

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Posted 19 April 2019 - 12:20 AM

Success, I found a pair of Orion 116mm hinged rings, brand-new in the box, at the very back of the shelf that holds rings and other mount parts.  A layer of thick felt and they'll work perfectly.  I just might get the Jaegers looking at the stars by Friday night.  


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#7035 PeriodicTrends

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Posted 19 April 2019 - 01:47 AM

Well, sometimes you hope for an optical flat, but end up with a telescope instead. I guess I asked for it!

For those that are interested: 10” approx f8? f13. No shame in using my roof for a mount?

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Edited by PeriodicTrends, 19 April 2019 - 07:46 PM.

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#7036 PeriodicTrends

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Posted 19 April 2019 - 08:31 AM

I did a bit more investimigating this morning...any thoughts?

 

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#7037 clamchip

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Posted 19 April 2019 - 09:44 AM

Wow!

I'd build yourself a tubeless to test it for astronomical use.

You can mount it to a ordinary ladder with a secondary cage at the other end.

I just used a stick and a coffee can.

Robert

 

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#7038 CHASLX200

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Posted 19 April 2019 - 12:29 PM

Wow!

I'd build yourself a tubeless to test it for astronomical use.

You can mount it to a ordinary ladder with a secondary cage at the other end.

I just used a stick and a coffee can.

Robert

 

attachicon.gif post-50896-0-10142000-1452734972_thumb.jpg

attachicon.gif post-50896-0-70992100-1452734779_thumb.jpg

Smart move. I did something like that when i redid my 8" f/8 Edmund back in 1988. I used two pieces of Sonotube on a board to figure out how long a tube i needed.



#7039 Defenderslideguitar

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Posted 19 April 2019 - 02:32 PM

Gotta love that white porcelain work  bench


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#7040 CCD-Freak

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Posted 19 April 2019 - 06:29 PM

Well, sometimes you hope for an optical flat, but end up with a telescope instead. I guess I asked for it!

For those that are interested: 10” approx f13. No shame in using my roof for a mount?

If that is the radius then the FL would be 81.25"  1/10 wave to boot.  That would make a great "planet canon"  grin.gif   Nothing like a looooooooong Newt. 

 

 

John

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Edited by CCD-Freak, 19 April 2019 - 06:40 PM.

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#7041 Augustus

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Posted 19 April 2019 - 06:45 PM

I did a bit more investimigating this morning...any thoughts?

Not sure how you got f/13, according to what it says there the radius is 81.25" making it an f/8.1.


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#7042 PeriodicTrends

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Posted 19 April 2019 - 07:43 PM

Not sure how you got f/13, according to what it says there the radius is 81.25" making it an f/8.1.

Wouldn’t be the first time, nor the last I’d guess! I musta forgot my two-too? Shoulda just gone to bed.

So, a big Tinsley yard canon, doing ballet across the skies. I’d guess the eyepiece height might require a step stool. I’ll have to throw all this in Newt-Web.

 

So pretty!

 

 

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Edited by PeriodicTrends, 19 April 2019 - 08:07 PM.


#7043 clamchip

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Posted 19 April 2019 - 08:02 PM

Odd it's marked with it's R for radius and not the focal length.

Half the radius will be the focal length and yes 81.25" f/8.

It may not be parabolic and maybe for lasers or some lab work

of some kind.

A test rig should prove whether it is suitable for astronomy.

 

Robert 


Edited by clamchip, 19 April 2019 - 08:04 PM.

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#7044 PeriodicTrends

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Posted 19 April 2019 - 08:49 PM

Odd it's marked with it's R for radius and not the focal length.
Half the radius will be the focal length and yes 81.25" f/8.
It may not be parabolic and maybe for lasers or some lab work
of some kind.
A test rig should prove whether it is suitable for astronomy.

Robert


I was wondering that too. I did a quick Ronchi tonight. I think if it is a sphere you get straight bars? Anyway that is what I saw.

#7045 terraclarke

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Posted 20 April 2019 - 07:16 AM

Odd it's marked with it's R for radius and not the focal length.

Half the radius will be the focal length and yes 81.25" f/8.

It may not be parabolic and maybe for lasers or some lab work

of some kind.

A test rig should prove whether it is suitable for astronomy.

 

Robert 

I think it, in and of itself, was part of some sort of test rig or demonstration device.



#7046 Augustus

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Posted 20 April 2019 - 09:42 AM

I was wondering that too. I did a quick Ronchi tonight. I think if it is a sphere you get straight bars? Anyway that is what I saw.

Yes, that would mean it's spherical.

 

If you wanted to give it a shot it'd be pretty easy to parabolize...



#7047 Chuck Hards

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Posted 20 April 2019 - 05:37 PM

Turns out the main tube of the Jaegers is 4" OD, not 4.25".  I found pair of 100mm Orion rings, stripped out the factory felt and installed self-adhesive flocked paper (Edmund).  It gained just enough room to let the rings fit.  I got a different Losmandy plate than the first one I picked up, found one I started to sand-down for a repaint some years ago. 

 

So it's all mounted up on my old Jaegers mount with clock-drive, on a tall pedestal that I made from a steel fencepost.  The original Jaegers feet are used.  This arrangement puts the tube above my eye level when pointed directly horizontal, but ideal for everything else above a few degrees.

 

Can't wait to try it out- but last night was cloudy, and it's raining right now as thunderstorms roll-through, one after another with just a few brief minutes in between each.  So you'll have to wait for the observing report and I'm more upset about that than you are, I'm sure.  lol.gif  

 

Here's a few pics of it ready to go, set up in the garage.  The shiny aluminum part is the adapter I turned to attach the Losmandy saddle.  I'm going to just break down and get a pair of Parallax 4" rings, they are so much more robust than these rings.  But the Orion will do for now.  

 

008a.jpg  007a.jpg  009a.jpg  

 

 

 

 

 

 


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#7048 AstroKerr

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Posted 20 April 2019 - 09:37 PM

Wow!

I'd build yourself a tubeless to test it for astronomical use.

You can mount it to a ordinary ladder with a secondary cage at the other end.

I just used a stick and a coffee can.

Robert

 

attachicon.gif post-50896-0-10142000-1452734972_thumb.jpg

attachicon.gif post-50896-0-70992100-1452734779_thumb.jpg

Using a loo as a mount - absolutely genius! I take it you've motorised the lid for the alt; how're you handlling the azimuth?


Edited by AstroKerr, 20 April 2019 - 09:40 PM.


#7049 AstroKerr

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Posted 20 April 2019 - 09:44 PM

Grail level, Charles.


Edited by AstroKerr, 20 April 2019 - 09:45 PM.


#7050 clamchip

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Posted 20 April 2019 - 10:14 PM

Using a loo as a mount - absolutely genius! I take it you've motorised the lid for the alt; how're you handlling the azimuth?

I happened to have the potty in my shop.  I have not put it to use other than a place to put things.

The thought of using it for a mount crossed my mind more than once!

 

Robert


Edited by clamchip, 21 April 2019 - 10:26 AM.

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