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ToHo H-45 (Eikow) 114mm x 1200mm VERY COOL!!!

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#51 Compressorguy

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Posted 27 October 2012 - 04:18 PM

A little "Old English" on the legs.

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#52 Compressorguy

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Posted 27 October 2012 - 04:22 PM

OTA installed. The controls are very smooth now!

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#53 Compressorguy

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Posted 27 October 2012 - 04:26 PM

Also waxed the tube and a little touch up paint.

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#54 Compressorguy

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Posted 27 October 2012 - 04:29 PM

Eyepieces dis-assembled and cleaned. Primary and secondary cleaned. Just need to clean the finder glass.

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#55 CharlieB

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Posted 27 October 2012 - 05:02 PM

Absolutely stunning work! Is there any slop in the dec mechanism? I have the same mount for my Swift 831 and it's very annoying - especially since I can't seem to get rid of it. You have a very rare and very cool scope!

#56 sgorton99

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Posted 27 October 2012 - 05:37 PM

Awesome job ;)!

#57 madeline

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Posted 27 October 2012 - 05:43 PM

Scott, was there anything a person should watch out for on disasembling and cleaning the mount?

#58 madeline

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Posted 27 October 2012 - 05:43 PM

Scott, was there anything a person should watch out for on disasembling and cleaning the mount?

#59 Joe Cepleur

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Posted 27 October 2012 - 06:42 PM

Is there any slop in the dec mechanism? I have the same mount for my Swift 831 and it's very annoying - especially since I can't seem to get rid of it.


The worm gears must be lubricated with dampening grease. Folks today typically use fancy synthetic greases designed for cars or bicycles. Wrong stuff. Use dampening grease to prevent slop.

Dampening grease is like a thick putty that both fills voids and lubricates. Thus it both prevents slop, and allows parts to move smoothly when light forces are applied. Search this forum to learn more about it. Everything I know, I learned here.

#60 Compressorguy

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Posted 27 October 2012 - 07:16 PM

Is there any slop in the dec mechanism? I have the same mount for my Swift 831 and it's very annoying - especially since I can't seem to get rid of it.


Before re-doing the mount there was some slop. Most of it was from loose bolts. Afterwards, there is virtually no slop.

I also agree with Joe, cleaning and regreasing the mount can remove alot of additional slop by filling voids. The type of grease will make a difference and there is two types ususally recommended here. I use the red stuff (can't remember the name) for mounts. It is thicker than Super Lube, which I use for focusers and baffle tubes.

Have you dis-assembled and regreased your mount? Also, I would recommend you grab the DEC shaft firmly and slightly wiggle the ota side to side in DEC and carefully watch where the slop is originating from. It could be 1 thing or combination of things adding up to alot of slop.

Here are a couple of areas to watch for. My bolts were loose here.

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#61 Compressorguy

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Posted 27 October 2012 - 07:21 PM

Make sure that the worm end play is adjusted properly. If not, it will move slightly side to side when you wiggle the OTA.

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#62 Compressorguy

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Posted 27 October 2012 - 07:25 PM

Also, make sure there is adequate grease in all these areas.

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#63 Compressorguy

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Posted 27 October 2012 - 07:31 PM

If these holes are badly worn, you can put some tin foil or .001 shim stock around the bolt to close up the tolerance. Be sure to grease it.

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#64 Compressorguy

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Posted 27 October 2012 - 07:43 PM

Scott, was there anything a person should watch out for on disasembling and cleaning the mount?


Hi Madeline, not really. It is pretty straight forward. There are a couple of tips however. To remove the DEC shaft you need to access the bushing/retainer set screw which is inline with a hole that is located behind the DEC pointer. Otherwise you may gall the threads.

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#65 Compressorguy

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Posted 27 October 2012 - 07:54 PM

Also, remember to remove the RA shaft nut set screw. It will be hard to remove the nut depending on if the set screw distorted the threads. Put the blunt end of a drill bit (the same same size as the set screw hole) in the hole to use as a wrench to remove the RA shaft nut.

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#66 Compressorguy

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Posted 27 October 2012 - 08:16 PM

Thank you all for the compliments. By the way I meant to post this link to some vintage Japanese catalogs where I found a listing of this particular scope. Mine is listed in the 1972 Eikow catalog. It also appears in the 1967 catalog but with adjustable height legs. Enjoy the catalogs.........er wish list.

http://yumarin7.saku...jp/Csiryou.html

#67 madeline

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Posted 27 October 2012 - 11:24 PM

Scott, great photographs and great how-to. Thanks for posting all that information and that link. Look forward for a first light report.

#68 Joe Cepleur

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Posted 28 October 2012 - 07:08 AM

Wow! What you have there, Madeline, is a detailed description from someone who truly knows! Closest I've come to disassembling a mount was watching a machinist friend fix mine two years ago.

Cleaning a mount removes the original grease. Some of the seemingly bad glue is actually necessary old dampening grease. My mount became sloppy after cleaning; no amount of adjusting would fix it. The solution was to discover and reapply dampening grease. Ordinary greases are so slippery as to allow slop. They get squeezed out of position at the slightest pressure. Dampening grease stays where you put it. It is not a fudge to bad adjustment, but an essential component of the mount as originally designed.

#69 Mr Magoo

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Posted 28 October 2012 - 07:21 AM

Scott,
That has to be one of the coolest scopes I've seen. Do you think these were imported and sold in the United States or is this something that an individual would have brought over here? I have not been doing this as long as some of you, but I've never seen one in the time that I have. I'm curious as to how well it would hold collimation. Can't be any worse than my modern Lightbridge that flexes like a Slinky. Congratulations on a great find. Can't wait to hear how it performs.

#70 Compressorguy

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Posted 28 October 2012 - 08:46 AM

Hi Ken, it is really unique for sure. My gut feeling is that it was brought over by someone. The previous owner stated that someone had given him the scope 10-15 years ago. No other history is known. I've searched CN and was able to find only few other references to this scope. One is a H-45 Alt/az mount from a poster in Normandy, France. The other was an EQ mounted one similar to mine used as a movie prop. Check out this
link.

http://www.cloudynig...ev=#Post4807971

#71 rustynailz911

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Posted 28 October 2012 - 08:58 AM

A reverse truss tube that is awsome!Congrats

#72 Steve_M_M

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Posted 28 October 2012 - 11:55 AM

Scott,

I have a reference to one of these being sold on Ebay back in 2003. It went for an amazing $85 back then....and that is probably only because John S. and I started our own bidding war.

#73 Compressorguy

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Posted 28 October 2012 - 03:03 PM

Hi Steve, it didnt sell for much more than that today and shipping was almost as much as the scope. The owner shipped it by Greyhound bus, which did an excellent job. I would definitely consider using them in the future.

On another note, my daughter contributed to the cause today.
A pair of "overly tight" stretchy pants were "repurposed" into a stray light shield. Just cut one of the legs to length and slide it on. There's some poetic justice for vintage dad's everywhere.

Don't have to worry about those anymore. :jump:

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#74 Mike E.

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Posted 28 October 2012 - 08:53 PM

:) Nice.

#75 CharlieB

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Posted 29 October 2012 - 07:33 AM

If these holes are badly worn, you can put some tin foil or .001 shim stock around the bolt to close up the tolerance. Be sure to grease it.


I'm glad you posted that photo of the dec mechanism. I always wondered if the split ring lock washer on the end of the screw on my mount was original or an add-on. Those are very handy pictures to have to reference. Thanks again!


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