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Finder for Palomar Jr.

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#1 JoshUrban

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Posted 22 August 2019 - 02:24 PM

Hello, everyone!

 

  Josh here - new as a poster, a fan of CN for years.  I just hit the best yard sale ever, picking up four scopes, one of them being a 60's (?) Edmund Scientific Palomar Jr. 4.25" f/10.  It's complete - except the finderscope.  Does anyone have any recommendations on either a direct replacement, or a close match?  It's such a great design, would love to keep it as close to stock as possible.

 

  Also, I'm new to the classic scope game.  I was blown away by lunar views through this piece.  From my understanding, it's a 60's build (white tube on a massive EQ mount, wooden tripod legs), spherical mirror, single stalk prism secondary with a clock drive (that for some reason wasn't letting me move in the RA axis no matter how I fiddled with the clutch.  I unbolted the motor with the intention of fixing this soon.)  

 

  I could be wrong about all of this - any input is greatly appreciated!

 

Thanks so much, and clear skies.  

 

Josh


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#2 clamchip

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Posted 22 August 2019 - 08:07 PM

Hi Josh,

Keep your eye on ebay, the Edmund finder is very common over there.

It's used on all models from the mid 1950's clear up into the 1980's.

It started out black, around the early 1960's it was painted white, and the last

ones were red. 

Your telescope is on a tripod? I'd love to see pictures of it, most were on a pedestal.

Your drive, it sounds like your clutch is stuck to the worm gear, you need to slacken

off the center nut or the 2 thumb screws and get the leather washer unstuck from the

big gear.

 

Robert


Edited by clamchip, 22 August 2019 - 08:10 PM.


#3 Chuck Hards

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Posted 23 August 2019 - 05:08 PM

Josh, post a pic.  The finder bracket is different depending on time frame, as well as the finder itself on late models.  



#4 Myk Rian

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Posted 23 August 2019 - 05:35 PM

Here's my finder on a '70s model. Made in Japan.
d7816d060ffba042278f0d08422dd7e3.jpg

Myk
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#5 Bomber Bob

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Posted 23 August 2019 - 06:11 PM

I'd go with one of the 24mm "jewel" finders -- either all black on the single stalk, or the black & white version on two brackets:

 

Edmund 4 - Finder P01.jpg

 

This one is original to my 1950s Edmund 4" F15 refractor.  These have very fine optics.



#6 Garyth64

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Posted 23 August 2019 - 06:22 PM

Here's my finder on a '70s model. Made in Japan.
d7816d060ffba042278f0d08422dd7e3.jpg

Myk

I think that's the one that may have come on the scope originally.



#7 Gil V

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Posted 23 August 2019 - 06:28 PM

“massive EQ mount”.

Funny.

#8 clamchip

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Posted 23 August 2019 - 08:27 PM

The tripod he has may mean it's a early model.

The early models had 30" maple legs and a 30mm finder, the finder rings are larger.

The finder rings will be larger and have flat thumb screws for the early model and you will need

a 30mm finder for this one, like my top photo.

The later rings are smaller and have chrome knurl head screws as shown in the bottom photo.

Robert

 

IMG_8724.jpg

post-50896-0-45842500-1514764384_thumb.jpg


Edited by clamchip, 23 August 2019 - 08:29 PM.

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#9 JoshUrban

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Posted 25 August 2019 - 10:54 AM

Hey folks!
 
  Thanks for the replies and advice!  Here's an album I just uploaded (still getting used to how the specifics work here.)  
 
IMG 20190822 150205122
Album: Palomar Jr.
3 images
0 comments

 
It does indeed have maple legs, so I'm guessing an earlier model?
 
Josh


#10 clamchip

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Posted 25 August 2019 - 05:42 PM

The finder you need to look for is the one posted in post #4 of this thread.

The mounting you have is the 'Heavy Duty' usually found with the 6" f/8 Super Space Conqueror.

Your 'Space Conqueror' was sold with the smaller 5/8" shaft mount.

But that's okay the saddle has hole spacing for both telescopes and the mount you have is far more

up to the task.

Someone may have ordered the parts individually. The clock drive motor cover will give you the date

the drive was made.

The fiber setting circles puts the mount around the late 1960's into the mid 1970's.

Some of the 4-1/4" primary mirrors will have a date stamped on the back as well.

 

Robert 



#11 JoshUrban

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Posted 26 August 2019 - 07:35 AM

Thanks, Robert!

 

  I'll keep my eyes peeled on eBay.  And d'oh!  There's that date on the motor, right in plain sight.  12/70.  Cool!  Nice to have a USA made scope from a good era of music.  :)  

 

I appreciate the input, everyone!  

 

Josh



#12 JoshUrban

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Posted 26 August 2019 - 07:38 AM

Hey Myk, what's the OD on that finder tube?  I'm looking for an exact Edmund one, BUT should I come across something else...would be good to know.  

 

Thanks!

 

Josh

Here's my finder on a '70s model. Made in Japan.
d7816d060ffba042278f0d08422dd7e3.jpg

Myk



#13 Chuck Hards

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Posted 26 August 2019 - 12:29 PM

I have a couple of those finders in various states of wear, if you feel up to a little refurb, I'll give you one for just the cost of postage.  PM me if interested, Josh.


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