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Compairing The Unitron 140,150, 152 Mount.

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#1 mustgobigger

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Posted 24 January 2010 - 02:21 AM

i thought i would post a few pictures of the difference
between these mounts for size comparison.
side by side the 150 looks like it has the same size base
parts as the 152.
in my opinion it will hold the same amount of weight.
this is by far the most used mount i have
for quick driveway viewing.
its smooth in both axis and a pleasure to use.
the 140 by comparison is a lot smaller and will
hold a 3" ota but its pushing it a little.
the 152 is a lot more trouble to set up but
the tracking makes it worth it.
well i just wanted to show some side by side pictures
for those that have never seen both together.
Brian

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#2 mustgobigger

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Posted 24 January 2010 - 02:23 AM

here are the 150 and 140
side by side.

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#3 mustgobigger

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Posted 24 January 2010 - 02:24 AM

all three

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#4 mustgobigger

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Posted 24 January 2010 - 02:27 AM

here is a mirror shot
if my 4"

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#5 mustgobigger

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Posted 24 January 2010 - 02:31 AM

getting ready to test out my new drives.

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#6 mustgobigger

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Posted 24 January 2010 - 02:33 AM

new superunihex is smooth after a little rework.

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#7 Happy-Idiot

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Posted 24 January 2010 - 09:54 AM

Brian nice photos, i see you have taken this hobby to the next level, taking pictures in the bedroom. The mirror shot is especially nice. My wife would kill me, she is the jealous type.

All joking aside i love your collection and yes it is confusing the sizes and features of the different models. The 3" eq is so large that i thought it was a 4" when i first purchased it. It took me a week of posting until someone set me straight that it was a 3". I think this is where Unitron really shined, i belive their solid beefy mounts is why people loved them so much. A Zeiss on a flimsy shaky mount is almost useless.

Nice post and remember what happens in Classics stays in Classics! We wont tell anyone about the photos. ;)

BRIAN YOU ARE A WILDMAN! :yay: Posted Image

#8 akman1955

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Posted 24 January 2010 - 09:59 AM

:)Nice photo's Brian, you need to show the line up of all three unitron EQ mounts as they are neat side by side...john

#9 mustgobigger

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Posted 24 January 2010 - 11:33 AM

no beds in this room,
nothing but telescopes, parts and movies.
used to be the den till my unitrons took over.
one day soon i am going to set up all my unitrons
for a photo session.

:whee:

#10 mikey cee

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Posted 24 January 2010 - 01:33 PM

Brian......Really nice pics. Good that you did what I did awhile back with the Royal Astro mounts. Most people don't reallize the huge jump from a 3" mount to a 4" mount. Yeah they might tell you it would be obvious but they wouldn't really know how obvious unless you 2x4'd over the head with shots like these. :smirk: :waytogo:Mike PS Can you imagine what a 4" mount must look like compared to a 5" or 6"?? :crazy: :crazy:

#11 Roel

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Posted 27 January 2010 - 01:53 PM

Wonderfull!! That fully equipped 4" equatorial with the beautiful tube rings and the 3" as guide scope: a work of art!

Could you tell me what year your 4" OTA is build? I have never seen focuser knobs like that. Are they original?

#12 mustgobigger

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Posted 27 January 2010 - 04:09 PM

mike,
yea i have had a few mistake the 4" for 3"
when i have posted pics.
hard to get a handle on size unless you are standing there.
roel,
mount and ota are 1972 and knobs are original.
guisescope on this one is my custom tascotron 60mm x 1000mm
but i will have the 75mm like in my rings post mounted on
a 4" scope soon.
i am going to redo one of my 75mm ota's for this
purpose as it needs paint work anyway.
Brian

#13 David Johns

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Posted 27 January 2010 - 05:32 PM

Terrific comparison photos, Brian, thanks for sharing... Unitron mounts are beautifully engineered. :jump:

My 152 mount is identicle to yours, including the polished setting circles which are a work of art and even the sychronous motor (am I correct that there were two motor models???). Visually, one obvious but small difference is that my polar axis is set a lot shallower... three years ago I moved closer to the equator (to 25 degrees south) and (unfortunately) had to add a short extension to the original latitude screw to gain sufficient adjustment... works ok though.

I recently stripped and regreased all moving parts with a spray-on teflon lubricant... seems to work fine but am a little worried that I should has used a different product... any advice, Brian?

Thanks again for sharing.

Cheers
David

#14 akman1955

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Posted 27 January 2010 - 07:32 PM

:)Brian, did they make a 3" version of your 150 mount? because i think i have one. john

#15 mustgobigger

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Posted 27 January 2010 - 07:43 PM

david,
i use a synthetic non petroleum based lube from
local hardware.
if it does not get cold where you are i would think
you will be fine.
john,
yes they do, it called a 140 mount....see smaller mount
above.
Brian

#16 akman1955

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Posted 27 January 2010 - 07:49 PM

:)Brian, mine has the same angle rod with wieght as your? almost like the brandon. john

#17 mustgobigger

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Posted 27 January 2010 - 07:53 PM

might have been added later.
unless it was for another company.

#18 akman1955

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Posted 27 January 2010 - 07:55 PM

:)Its unitron ..now you are going too make me drag it out to take picture..give me a moment and will post. john

#19 akman1955

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Posted 27 January 2010 - 08:23 PM

:)okay, sorry for cluttered picture but here is differance between the brandon mount i bought from you and the unitron mount..they are almost the same except for slow motion cables on brandon and differant wieght set up on brandon. the unitron is on left...brandon on right. john

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#20 akman1955

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Posted 27 January 2010 - 08:25 PM

another

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#21 Preston Smith

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Posted 27 January 2010 - 09:23 PM

I recently stripped and regreased all moving parts with a spray-on teflon lubricant... seems to work fine but am a little worried that I should has used a different product... any advice, Brian?


Thanks again for sharing.

Cheers
David


David,

Here's what I use on all my vintage mounts. It's expensive but an outstanding performer - even in very cold weather:


Dow Corning Molykote

#22 mustgobigger

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Posted 27 January 2010 - 09:50 PM

john,
they are both unitron mounts.
the mods to slow motion were done by previous owner
so he could put cables instead of knobs.
must have had short arms.
pretty sure this was unitron 144 mount if i remember right.
i think these were used on brandon 3 & 4" scopes and
also polarex /unitron 3" and i think i saw a picture of
a 3" folded on one of these also.
as for weights i think you just have same mount
made for 2 different scopes.
can you take a picture of one of those mounts next to
a 140 mount without the weight and shaft.
my picture above might not be a good representation
as it is my 1954 worm drive mount and newer mounts
dont have hollowed out parts like that one.

Brian

#23 akman1955

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Posted 27 January 2010 - 09:53 PM

:grin:you got it.one moment for pictures...john

#24 akman1955

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Posted 27 January 2010 - 10:11 PM

:jump:okay brian..from left to right is 60mm unitron alt/az..75mm alt/az (same as yours)..brandon 75mm alt/az which is same size as unitron alt/az in previouse picture. john

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#25 mustgobigger

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Posted 27 January 2010 - 10:29 PM

they look close except beefier spring's that would
hold more weight and non rounded base.shows you lots of changes over the years
if you look close but still have that classic unitron
no mistake look.
anyway i think one on right was called 144 and made for
mostly for European market.(polarex)
thanks john.






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