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Equipment Discussions >> Classic Telescopes

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starman876
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Reged: 04/28/08

Loc: VA
Re: Unitron 155 102mm new [Re: starman876]
      #5527574 - 11/19/12 09:53 AM

Also, most of the mount boxes had the holder for the counterwieght covered with sheet metal so the counterweight could not break free through the wood and damage the mount.

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sgorton99
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Reged: 04/30/08

Loc: Wisconsin, Madison
Re: Unitron 155 102mm new [Re: starman876]
      #5527883 - 11/19/12 12:50 PM

Quote:

Great looking mount box. Did he make that just form pictures or did the carpenter have some measurements to go by?




Thanks. A combination of pictures and using the mount itself for fitting and sizing. I'm leaning toward not varnishing - maybe just staining the outside. I also will be using felt to cushion the mount and under the weights. This box is really for storing, I will not be shipping the mount in it or anything like that.


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starman876
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Reged: 04/28/08

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Re: Unitron 155 102mm new [Re: sgorton99]
      #5528009 - 11/19/12 01:43 PM

I noticed the grain on the wood holding the counterweights is vertical. The grain should be going horizontal. The vertical way is the weakest way to build something to hold something heavy. Could very easily break along the grain should you put the box down hard accidently.

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sgorton99
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Re: Unitron 155 102mm new [Re: starman876]
      #5553471 - 12/04/12 07:35 AM

Dropped the base of the mount off yesterday at my local garage for painting (again). Now that it is post-deer hunting season in WI he should have more time! I promise to post pictures someday of the whole package back together...

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sgorton99
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Re: Unitron 155 102mm new [Re: sgorton99]
      #5623285 - 01/14/13 07:34 PM Attachment (30 downloads)

My second or "back-up" Unitron lens arrived today, freshly cleaned from D&G Optical with new spacers (two were missing). Also making progress on painting the mount base, but need a tad warmer weather here before another coat of paint.

Impressed with D&G and the cleaning, just need to be patient as this took 2 months. Barry was able to get almost all of the white "ghosts" off. I can see coating losses from presumably prior poor cleanings, but overall very nice for a 50+ year old lens. Don't you love how the camera shows those tiny specs of dust?


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Rich (RLTYS)Moderator
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Re: Unitron 155 102mm new [Re: sgorton99]
      #5623870 - 01/15/13 06:36 AM

Nice looking.

Rich (RLTYS)


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starman876
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Re: Unitron 155 102mm new [Re: Rich (RLTYS)]
      #5624198 - 01/15/13 11:10 AM

Nice looking lens. soon you will have more 4" scopes then you know what to do with. Maybe a binocular Unitron is in the future plans

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sgorton99
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Re: Unitron 155 102mm new [Re: starman876]
      #5624288 - 01/15/13 12:11 PM

Quote:

Nice looking lens. soon you will have more 4" scopes then you know what to do with. Maybe a binocular Unitron is in the future plans




Thanks! I spoke with Barry at D&G this morning. He said the lens tested out very well. He did say there are a couple of residual spots he did not get off because he was afraid he would then have to refigure the lens with too much polishing. He prefers to keep the old Unitron lenses as original as possible if the quality is there. He also told me DON'T mess with the small screws in the front, just use the outside large screws for collimating.


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starman876
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Re: Unitron 155 102mm new [Re: sgorton99]
      #5624355 - 01/15/13 12:56 PM

Interesting you mention those small screws. I have found several Unitron that were not colimated properly. Maybe because the tube was not square with lens cell and focuser. You can make slight adjustments with those screws, but it is never enough. I am sure that Unitron quality in the begining made sure that everything was squared up, but in later years the adjustable cells became the norm.

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sgorton99
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Re: Unitron 155 102mm new [Re: starman876]
      #5641184 - 01/24/13 06:12 PM

Sent the original lens that came with this scope to Barry at D&G today. Now that I have a second lens back in my hands, felt safer sending this one off. There are some minor fungus issues (after being stored in a garage in St. Paul, MN for 15 years), so I really wanted Barry to do the cleaning for me. Sorry this has been so slow...

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sgorton99
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Re: Unitron 155 102mm new [Re: sgorton99]
      #5649045 - 01/28/13 07:33 PM Attachment (19 downloads)

Still too cold here to spray paint the mount base (maybe tomorrow), so decided to take all the hardware off of the OTA and give it a nice clean up. I only used mild cleaner to get the grunge off, but what really made the big difference was a mild car wax. Not as good at detailing the picture history like PiSigma, but hopefully you get the idea.

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Bill Griffith
sage


Reged: 08/12/09

Loc: Ca.
Re: Unitron 155 102mm new [Re: sgorton99]
      #5649357 - 01/28/13 10:09 PM

Steve,

I'm drooling over this instrument! Looks GREAT!!

I said it before,but worth stating again An original assy. of mount and OTA from the late 50's to early early 60's is pretty rare to find.


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sgorton99
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Re: Unitron 155 102mm new [Re: Bill Griffith]
      #5649368 - 01/28/13 10:14 PM

Thanks Bill, I'm really enjoying working on getting this scope up and running. Wish it was going faster, but I want to do it right (or at least the best I can).
Steve


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PiSigma
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Reged: 10/14/09

Loc: North Carolina
Re: Unitron 155 102mm new [Re: sgorton99]
      #5649933 - 01/29/13 09:48 AM

Lookin' good Steve. I'll be interested to hear how the original lens turns out.

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sgorton99
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Unitron 155 level screws new [Re: PiSigma]
      #5812620 - 04/21/13 09:49 AM Attachment (14 downloads)

Finally making progress on painting the mount base with the weather slightly improving here in WI. 2 coats of primer and the first coat of satin black done. Now, trying to get the screws I need for the bubble levels and how they attach to the mount. Went to the hardware store yesterday, but that funny Unitron thread size is hard to find. Anyone know a source for these?

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sgorton99
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Re: Unitron 155 level screws new [Re: sgorton99]
      #5812621 - 04/21/13 09:50 AM Attachment (12 downloads)

Another

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terraclarke
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Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Unitron 155 level screws new [Re: sgorton99]
      #5812672 - 04/21/13 10:15 AM

Into the 1950s Japan, while metric had a different thread standard than Europe, so some of these old Japanese machine screws are very hard to replace with modern equivalents due to small variations in thread pitch and depth. Other possible sources for actual replacements of the screws might be folks who are restoring vintage Japanese motor cycles and bicycles, or WWII Japanese weaponry. Have you put a thread gage and micrometer on them?

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starman876
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Re: Unitron 155 level screws new [Re: terraclarke]
      #5812735 - 04/21/13 10:45 AM

Steve
Let me check my parts bin. If I have them I will send them to you. If all else fails you can get similar looking screws and tap new threads into the mount. I have been looking into making my mini mill into a CNC mill. It looks like the parts cost more than the mill cost me. However, it will enable me to make a lot of parts and also these very unsual threaded parts. I have so many different mounts and I was almost mystified how many different thread pitches I found even between the same model mounts.


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sgorton99
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Loc: Wisconsin, Madison
Re: Unitron 155 level screws new [Re: starman876]
      #5812742 - 04/21/13 10:47 AM

Thanks Johann!

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terraclarke
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Re: Unitron 155 level screws new [Re: starman876]
      #5812773 - 04/21/13 11:02 AM

Speaking of nuts and bolts.....

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