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Equipment Discussions >> Reflectors

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vkhastro1
sage
*****

Reged: 08/21/05

Loc: Ontario, Canada
Old friend renewed - 10" dob into the 21st century
      #5274995 - 06/16/12 10:37 PM

This story begins in the early 1980's. I had a dream to have one of RASC
Ottawa's best telescope makers built me one of his amazing creations. Max Stuart was a good friend and mentor who shared his passion for astronomy
with all. I bought several parts for the scope - Tectron 2" rack and pinion focuser, secondary mirror red dot finder and the truss tubes. Max did the rest - ground the primary (better than Strehl .98 - about 1/12 wave!), made the spider (a ultra thin curved 3-vane : when 4 vane were the norm) and 2ndary holder, 6 sided aluminum upper tube assembly, aircraft aluminum 10" diameter side bearing, mahogany plywood mirror box assembly and bent aluminum protective edging and a radical mirror cell with a push/pull mechanism that allowed collimation at the eyepiece. The upper cage assembly and 4 truss tubes were attached to a 4-side square base that used 4 threaded knobs to attach it to the lower mirror box assembly (imagine this design almost 30 years ago). Max's wife made the black material shroud. The 10" f 5.35 Dob was completed. This scope was as beautiful to look at as it was to use. I owned this scope for more than 10 years. I nicknamed the scope "Max 10" for obvious reasons.
Another telescope at the local dealer caught my fancy and and I sold the scope for a great price of $1200.00. The dealer always wanted a Max Stuart scope and now he got his wish.
Flash forward to late 2011. I'm cruising the internet looking for really nothing in particular. I checked this same dealers' website and there it was
my Max 10 for sale for the princely price of $678.00 tax included. I quickly called the dealer to inquire if the scope was sold. NO was answer but the
scope was badly neglected - never used! Just collecting dirt, dust etc.
I said put her aside, I'll be in on the weekend to take a look. It wasn't a pretty
sight - completely covered in at least a 1/4" of dust, I removed the mirror cover and couldn't even see my reflection in the primary, it looked awful. I
needed to rescue my lost companion. Paid the asking price and returned home.
I spent 2 hours cleaning off the dust, waxing the wood, I carefully cleaned the primary and secondary mirrors. The coatings looked in really good shape - no need for a recoat. I spent one evening observing with my 'new scope',
after careful collimation the optics were as outstanding as I remembered. I was a real fool to have sold this scope in the 1st place.
Now its 2012, my scope needs to be brought into the 21st century. I replaced the focuser with a 2nd hand JMI NGF-1 crayford dual speed version - it even had the same hole pattern as the original. Placed a cats eye triangle in the centre of the mirror with the special template. Removed the red dot finder and attached a quick disconnect 60mm diameter finder ring and a beautiful StellarVue 8x50 RACI finder with rotating head. All this extra weight on the Upper Cage Assembly required counterweighting but I didn't want to mark the beautiful wood finish. I carefully drilled 4 holes on the back
of the mirror box behind the mirror cell, installed two 5/16" threaded rods
- used large washers and wing nuts as well as several small Meade lead counterweights and carefully balanced the scope. I had recently purchased the Explore Scientific SWA eyepieces and ES UWA eyepieces (on sale!) and now am ready to observe tonight. I can get 1.4* with the ES 28mm SWA.
I also purchased a Howie Glatter laser/blug combo to get perfect collimation.
This little beauty has risen from the dead and will quickly become the ultimate travelling companion!
New first light in tomorrow's Deep Sky section - weather permitting.


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Darenwh
Carpal Tunnel


Reged: 05/11/06

Loc: Covington, GA
Re: Old friend renewed - 10" dob into the 21st century new [Re: vkhastro1]
      #5275125 - 06/17/12 01:16 AM

Hey, Where are the pics? Sounds like a great scope. I want to see it. Congrats on reclaiming her.

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vkhastro1
sage
*****

Reged: 08/21/05

Loc: Ontario, Canada
Re: Old friend renewed - 10" dob into the 21st century new [Re: Darenwh]
      #5275331 - 06/17/12 09:02 AM

I don't own a digital camera to provide photos.
I just posted my 1st light observations in the "DEEP SKY" section.


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vkhastro1
sage
*****

Reged: 08/21/05

Loc: Ontario, Canada
Re: Old friend renewed - 10" dob into the 21st century new [Re: vkhastro1]
      #5275458 - 06/17/12 11:06 AM

I had a little trouble using the SV 8X50 finder in locating my objects. It took some sighting along the screws holding the finder in its ring mount to get me the approximate location to successfully get the deep sky objects in the field of view. I moved the finder over to one side away from the main 2" focuser and installed a spare Rigel quikpointer between the relocated finder and the 2" focuser. This should solve this problem. Just need to set the
parallel axes of the main scope, Rigel and SV finder.


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