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Lots on Unitron lately

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140 replies to this topic

#126 Kasmos

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Posted 30 October 2020 - 03:25 PM

I'd think maybe some surface paint might come off if it was badly oxidized. Like on a car that's been exposed long without polishing/waxing.

 

My (2) 114 mounts both circa '57-'58, and another 114 mount from the '60s  plus a '56 128 mount all shine nice with no signs of caulkyness.

 

I've yet to thoroughly detail any of them, but the 114 mount from the 60's was obviously left outside very long and cleaned up pretty well with no real noticeable paint residue on the cleaning rags.


Edited by Kasmos, 30 October 2020 - 03:27 PM.


#127 CHASLX200

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Posted 30 October 2020 - 03:27 PM

a mount where the paint comes off with just whiping it with a rag??? Never had that happen.

Then you have not owned enough Unitrons bud. My paint would rub off on your hand man on my pre 1955 M160. It was stored set up on a porch for around 40 years and i am sure the sun did a number on it. Just like a old car that has sat in the weather will do the same thing.


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#128 Kasmos

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Posted 30 October 2020 - 03:37 PM

Then you have not owned enough Unitrons bud. My paint would rub off on your hand man on my pre 1955 M160. It was stored set up on a porch for around 40 years and i am sure the sun did a number on it. Just like a old car that has sat in the weather will do the same thing.

That's what I was thinking. That said, all it takes is to own one that's been left out a long time and I'm sure any brand would suffer a similar fate.



#129 Terra Nova

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Posted 30 October 2020 - 05:33 PM

I'd think maybe some surface paint might come off if it was badly oxidized. Like on a car that's been exposed long without polishing/waxing.

 

My (2) 114 mounts both circa '57-'58, and another 114 mount from the '60s  plus a '56 128 mount all shine nice with no signs of caulkyness.

 

I've yet to thoroughly detail any of them, but the 114 mount from the 60's was obviously left outside very long and cleaned up pretty well with no real noticeable paint residue on the cleaning rags.

No issues with my mid-50s 114 mount either Chris. But the old 152 GEM was another story. Just wiping it down with a wet cloth, my hands were black, the water in a pan that I put the cloth in looked like india ink.



#130 starman876

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Posted 30 October 2020 - 10:02 PM

Then you have not owned enough Unitrons bud. My paint would rub off on your hand man on my pre 1955 M160. It was stored set up on a porch for around 40 years and i am sure the sun did a number on it. Just like a old car that has sat in the weather will do the same thing.

well having had about 60 unitrons and still have around 40 and never running into that problem makes me special.  grin.gif



#131 Kasmos

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Posted 31 October 2020 - 03:26 AM

No issues with my mid-50s 114 mount either Chris. But the old 152 GEM was another story. Just wiping it down with a wet cloth, my hands were black, the water in a pan that I put the cloth in looked like india ink.

That's pretty bad. Perhaps it was just a problem with the very early models. Did the paint continue to come off as you owned it, or only the first time you wiped it down? 



#132 starman876

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Posted 31 October 2020 - 07:08 AM

No issues with my mid-50s 114 mount either Chris. But the old 152 GEM was another story. Just wiping it down with a wet cloth, my hands were black, the water in a pan that I put the cloth in looked like india ink.

I still have about 6 of these 152 mounts.  I will check them when I have time and see if the paint on any of them have this problem.  



#133 CHASLX200

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Posted 31 October 2020 - 07:42 AM

Any Unitron left in the sun will chalk up over time. All paint gets killed by the sun so it is not just a Unitron prob. The sun kills everything. Plastics you name it. The paint had turned brown- yellow on that pre 1955 M160.  It had sat on that porch since the 60's when i got it in 2005 for $500. Never could find the weight drive, but the weight and all the parts for the drive were found. Back then it was not even called a M160. I had to have all the tubes painted and all the lenes were shot on the main scope , guide scope and finder.


Edited by CHASLX200, 31 October 2020 - 07:45 AM.


#134 starman876

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Posted 31 October 2020 - 07:53 AM

Any Unitron left in the sun will chalk up over time. All paint gets killed by the sun so it is not just a Unitron prob. The sun kills everything. Plastics you name it. The paint had turned brown- yellow on that pre 1955 M160.  It had sat on that porch since the 60's when i got it in 2005 for $500. Never could find the weight drive, but the weight and all the parts for the drive were found. Back then it was not even called a M160. I had to have all the tubes painted and all the lenes were shot on the main scope , guide scope and finder.

Well, I never have left mine out in the sun.   However, I will check later today and see if any of the mounts have that issue.    I have also refinished a number of 152 mounts and never ran into the paint issue.  I  refinished them because they were badly scratched and chipped.   Was always interesing  once the paint was removed (with losts of sanding) how rough the aluminum castings were on the mounts.   They sure need a lot of filler  before they could be painted,  



#135 starman876

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Posted 31 October 2020 - 10:38 AM

I managed to get to three 152 mounts without having to move things out of the way.  None of the three mounts had any issues with the paint rubbing off.   Two of these mounts had the permanent cradle one have the removable cradle.  Maybe this paint issue was a particular batch of Unitron mounts with bad paint jobs or maybe some that were restored with the wrong paint.   I have had a lot of 4" unitrons (still have 6) and have never seen the paint issue.  


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#136 apfever

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Posted 31 October 2020 - 12:57 PM

Wow! A whole page wiped with paint wiping.  I guess maybe something different, quick, not too involved, like storing some extra parts or just pictures not posted.

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#137 apfever

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Posted 31 October 2020 - 01:15 PM

I have Everything except lost kerf dust. I have the micro piece that goes in the perpetually shown chip in the red rim.

It could all be pieced together and the broken tangs would bridge two gaps. It's a novelty but wrapped for the original parts pile. The cover and switch are fine, the switch is nice quality and works like a charm, the cover is missing some paint in the shown area but nowhere else. There are extra leg2hub bolts and nuts, also for the parts pile package. 

 

The last battery punched out using a reversed socket on extension. The black screw on cap was dust and crumbled. I tapped it with the hammer till it cracked and then peeled it off. The spring was flat like a coil top stove.  I only kept the tube.

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#138 apfever

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Posted 31 October 2020 - 01:38 PM

Next time around:

 

1. Painless setting of the RA worm and gear mesh.

2. Setting the RA shaft preload for the two ball bearings. This one gets a lot of car talk as in automotive analogy that most doing this will relate to - totally dude. 



#139 starman876

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Posted 31 October 2020 - 03:24 PM

it is such fun to take on a chalenge like that. All the while you hope you can salvage the piece.  Been there many times.



#140 apfever

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Posted 29 November 2020 - 09:30 AM

This may be a bizarre entry.  These scopes have a ton of that nickel plated brass. The vast majority of the hardware is plated brass. This stuff is easy to damage. Get a good set of tools, NICE screwdrivers that fit every slot as nice and fully as you can. Be nice. You are then going to screw it up anyway. You'll see touching, you'll learn. It's OK. 



#141 apfever

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Posted 05 June 2021 - 11:34 AM

This was a fluke of viewing, approximately 3:30 this morning.  As awesome as one could expect, fun to enjoy a real image. Not perfect viewing, image to match. Surprisingly nice night speaks for both. Almost makes me want to do a better check by way of side by side with the 28 B&L 4".  I did a side by side with that and my only other previous Uni 4" long sold. The B&L has very nice glass. 

 

Uni 40mm Monochro, and Nagler 7mm T6, Jupiter, Saturn, nights are short.

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