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Unitron Altazimuth Mountings for 2.4" and 3" Refractors

Tripod
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#1 Uncle Milt

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Posted 09 June 2021 - 12:05 PM

This probably seems like an awfully basic question, but are there any real differences between the Model 114 (2.4")

altazimuth mounting head and the 3" Model 140?

 

I recently purchased a mid-50s Model 114 head from another CN user, and it appears to be nearly identical to my

Model 140 head from the early 1960s.  Before this, I had always "assumed" that the 2.4" mount would be smaller --

a scaled down version  of the 3" mount.

 

What is the real story on this, and -- aside from the 50 mm mount that I also have -- is there another, smaller Unitron

altazimuth mount than the Model 114 / 140?

 

msg-9418-0-61985800-1622858381_thumb.jpg

 

Thanks -- 

 

 


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#2 MisterDan

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Posted 09 June 2021 - 01:19 PM

Unitron's wee 127 model (40mm) utilized a smaller alt-az mounting than the 114 did.  The 127's tube was drilled for screws/bolts, and it mounted directly to the mount head - no clamp or cradle.

 

The earliest 114s had a different alt-az mount than later versions did.  I think the later 114 and 140 mounts used essentially the same head, but the 140's azimuth bearing/gear diameter was a smidgen larger, so each turn of the azimuth control yielded a little less travel than the 114's.  I don't know if those differences translated to either mount's relative capacity.  Altitude travel for both models was identical.

 

The later 150 (4-inch) utilized yet another alt-az mount - stronger & more massive, of course.

 

Company 7 maintains some Unitron pdfs on their website:

http://www.company7....nitron_114.html

They're very interesting reads.

 

Best wishes.

Dan


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#3 starman876

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Posted 09 June 2021 - 06:10 PM

there are differences in the 114 head and the 140 head, but for a few years I believe they were the same.  I have a lot of Unitrons and have worked on a lot of mounts.  Some years ago I noticed that in some instances the head with a 114 was the same as the 140.    From what I gather with the large amount of parts they stored at Unitron that they did not buy complete kits from NS.   they bought parts and built the scope as needed.   The would order mounts, tripods, OTA's, lenses and more and build scopes as the orders came in.  Many Unitrons I have bought I found all the parts with the scope came in carboard boxes with Unitron part numbers on the boxes.  I know Unitron had a large data base of the parts they kept in stock. 


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#4 Terra Nova

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Posted 09 June 2021 - 06:56 PM

The tines of the 140 mount and the early (pre-1960s) 114 mount are wider than those of the later 114 mounts. This makes the tripods slightly different as well because of the wider separation between the two upper leg members of each leg.


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#5 Uncle Milt

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Posted 09 June 2021 - 10:31 PM

Thanks to all for the information on the Unitron mounts.   I was just talking with another CNer on the phone, and --

like me -- he had not seen a 2.4" altazimuth side by side with a 3" model recently to compare the mounts.  Pretty

basic stuff, but it eluded me for all these years... 

 

PS -- Terra (thanks!) is right about the size of the attaching tines on the tripod head.  Those on my "new" 2.4"

mount are quite a bit larger than those on my later 3" version, which are fairly large to start with.

 

While I no longer have a complete Unitron telescope, I more and more appreciate the Unitron parts and equipment

that I do have.  Quite a history.


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#6 starman876

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Posted 10 June 2021 - 07:35 AM

The tines of the 140 mount and the early (pre-1960s) 114 mount are wider than those of the later 114 mounts. This makes the tripods slightly different as well because of the wider separation between the two upper leg members of each leg.

Thanks Terra, I forgot to mention that.  The tripod for the 140 was also a bit larger.   Those larger tines was the only thing different between the two mounts.


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#7 ccwemyss

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Posted 10 June 2021 - 08:37 PM

Here is a picture of a 114 mount next to a 140 mount. The 140 is a more recent model than the 114. Although it has the same saddle plate, it is a heavier build. The legs of the tripod are also thicker. 

 

Chip W. 

 

Unitron Mounts - 1.jpeg


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#8 GreyDay

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Posted 11 June 2021 - 02:27 AM

I'm surprised nobody posted Dave Trotts comparison video, so here it is: https://www.youtube....h?v=kWOMhE88d6U


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#9 MisterDan

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Posted 11 June 2021 - 12:18 PM

foreheadslap.gif

 

Of course...  Leave it to Dave.

waytogo.gif bow.gif


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#10 CharlieB

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Posted 11 June 2021 - 01:29 PM

Yes, there is a smaller alt-az Unitron mount.  Here's my model 127 - 40mm f/17.5

 

127  mount.JPG

 

It's as nice as any other Unitron mount - just smaller.

 

Charlie

 

 

 

 

 


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#11 Terra Nova

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Posted 11 June 2021 - 02:55 PM

I'm surprised nobody posted Dave Trotts comparison video, so here it is: https://www.youtube....h?v=kWOMhE88d6U

Your’s truly is mentioned in that video! ;)


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#12 Defenderslideguitar

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Posted 11 June 2021 - 03:26 PM

I have the smaller Unitron   Alt Az mount and smaller Unitron folding wood tripod that came with a 70 mm Unitron spotter I got from Dave T.  Looks similar to the one Charlie shows above. I sold the 70mm Spotter   but somehow I still have that cute little Unitron Alt Az   I y works especially well with Binoculars

Not sure why I still have it if someone needs it

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Edited by Defenderslideguitar, 11 June 2021 - 04:05 PM.

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#13 starman876

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Posted 12 June 2021 - 08:02 AM

They did make a lot of different ALt AZ mounts.   Some are really small.



#14 Kasmos

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Posted 15 June 2021 - 02:24 PM

Here's two different 114 mounts.

 

Uni-Mounts.jpg

The one on the left is from the 60s and has the narrow leg tines that first showed up in about 1959.

The one on the right is the type with wide leg tines. This one has plastic knobs (removed) and is from '57 0r '58.

The same mount with cradle/clamshell attachment goes back to the middle of 1955  but used metal knobs.

The ones before that had a saddle to attach it to the tube and the slow motion controls were both on the right side.

 

Unitron-114-57-Mount.jpg

An easy way to spot a scope with the wide tines are the stud with two nuts to hold the legs.

The narrow tines used a stud with a black plastic wing nut on one side.

The legs are the same and are just spread more for the wider tines

 

 

 

 


Edited by Kasmos, 15 June 2021 - 02:25 PM.

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#15 starman876

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Posted 15 June 2021 - 02:44 PM

Here's two different 114 mounts.

 

attachicon.gifUni-Mounts.jpg

The one on the left is from the 60s and has the narrow leg tines that first showed up in about 1959.

The one on the right is the type with wide leg tines. This one has plastic knobs (removed) and is from '57 0r '58.

The same mount with cradle/clamshell attachment goes back to the middle of 1955  but used metal knobs.

The ones before that had a saddle to attach it to the tube and the slow motion controls were both on the right side.

 

attachicon.gifUnitron-114-57-Mount.jpg

An easy way to spot a scope with the wide tines are the stud with two nuts to hold the legs.

The narrow tines used a stud with a black plastic wing nut on one side.

The legs are the same and are just spread more for the wider tines

the one on the right looks more like a 140 mount.



#16 CharlieB

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Posted 15 June 2021 - 10:01 PM

Here's two different 114 mounts.

 

attachicon.gifUni-Mounts.jpg

The one on the left is from the 60s and has the narrow leg tines that first showed up in about 1959.

The one on the right is the type with wide leg tines. This one has plastic knobs (removed) and is from '57 0r '58.

The same mount with cradle/clamshell attachment goes back to the middle of 1955  but used metal knobs.

The ones before that had a saddle to attach it to the tube and the slow motion controls were both on the right side.

 

attachicon.gifUnitron-114-57-Mount.jpg

An easy way to spot a scope with the wide tines are the stud with two nuts to hold the legs.

The narrow tines used a stud with a black plastic wing nut on one side.

The legs are the same and are just spread more for the wider tines

It can't be a coincidence that the 60mm Soligor mounts we have are so similar to the early Unitron mount.  Makes one wonder.

 

Charlie

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#17 Kasmos

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Posted 15 June 2021 - 11:15 PM

the one on the right looks more like a 140 mount.

The one on the right came from a 62mm 114 that was sold on ebay and then parted out. The mount in the bottom photo is the same type and is from my circa '57-'58 62mm 114. The scope was given to the woman I bought it from by the original owner. The two mounts only differ in the pitch of the slow motion control's threads. I've kept photos of other 114s that have been posted or for sale and the ones old enough to be marked 62mm have the same wide tine mount. The first of the mounts with the removable clam/cradle still had the controls on the right side like Charlie's Soligor in the last post, so the ones like mine are probably the first with the azmuth control that moves.

 

I believe Terra's is the same as this one.

https://www.cloudyni...-114/?p=8667185

 

The only difference I could find between the Soligor and the early fixed saddle Unitrons is that the Soligor uses extremely fine threads on the controls. 



#18 Terra Nova

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Posted 16 June 2021 - 01:48 PM

Yes indeedie-do! It is the same!waytogo.gif

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#19 starman876

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Posted 16 June 2021 - 04:09 PM

The one on the right came from a 62mm 114 that was sold on ebay and then parted out. The mount in the bottom photo is the same type and is from my circa '57-'58 62mm 114. The scope was given to the woman I bought it from by the original owner. The two mounts only differ in the pitch of the slow motion control's threads. I've kept photos of other 114s that have been posted or for sale and the ones old enough to be marked 62mm have the same wide tine mount. The first of the mounts with the removable clam/cradle still had the controls on the right side like Charlie's Soligor in the last post, so the ones like mine are probably the first with the azmuth control that moves.

 

I believe Terra's is the same as this one.

https://www.cloudyni...-114/?p=8667185

 

The only difference I could find between the Soligor and the early fixed saddle Unitrons is that the Soligor uses extremely fine threads on the controls. 

You guys have never seen Unitron in action. Whatever went in the box is what was available at the timelol.gif



#20 starman876

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Posted 16 June 2021 - 04:32 PM

I guess the easiest way to tell the difference between the mounts is to compare the size of the spring slow motion cylinders. Also the shafts on the control are larger on the 140 mount.  Otherwise they look pretty much the same until you compare the counterweighted Alt Az mount. 


Edited by starman876, 16 June 2021 - 04:33 PM.


#21 Kasmos

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Posted 16 June 2021 - 06:40 PM

You guys have never seen Unitron in action. Whatever went in the box is what was available at the timelol.gif

Yes, but after some time old stock runs dry so many changes were irreversable as time went on. 




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