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  #1  
Old 10-11-2021, 02:43 PM
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FlashDrive (Poppy)
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Japanese 76mm f/16 Royal Tokyo

Picked this up today .... time to clean her up ...!!


Wet and dry on the tube, then repaint ...!!


Scratches only on tube / no dents


Dew shield has taken a knock at the tip ....bit of panel beating and repaint.


I have Baader Adapters to convert it to take 2" and 1.25 Eyepieces.


Finder is as usual with scratches, but the optics in it are very nice.


Front Lens is crystal clear with really nice coatings.


A work in progress to start over the next few weeks ....!!


Col...
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  #2  
Old 10-11-2021, 03:38 PM
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Nice Pops!
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  #3  
Old 10-11-2021, 04:12 PM
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FlashDrive (Poppy)
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Started on the Focuser ...pulled to bits and cleaned....rotary brass wire wheel on the Flange ....!!


This thing is ' solid ' no plastic at all.


Focuser wheels are brushed and solid Aluminum


Very smooth in operation and the back focus might as well reach for the ceiling .


Solid Steel Construction.


Col....
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  #4  
Old 10-11-2021, 04:14 PM
gts055 (Mark)
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Nice classic F16, that will be fun to clean and set up. It will give very nice views too. Mark
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  #5  
Old 10-11-2021, 04:33 PM
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FlashDrive (Poppy)
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That's it so far ...more work to come.


Col...
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  #6  
Old 10-11-2021, 10:14 PM
ausastronomer (John Bambury)
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Quote:
Originally Posted by FlashDrive View Post

This thing is ' solid ' no plastic at all.

Col....
Looks nice Col. I am guessing late 1960's to mid 1970's vintage ?

They built things properly and to last in those days !! Of course you paid for that with a lot of extra weight, but you knew things weren't going to crack, split, or wear out anytime soon.

BTW. Did you clean the screw heads with steel wool, or soak them in vinegar ?

Cheers
John B
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  #7  
Old 10-11-2021, 10:35 PM
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FlashDrive (Poppy)
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Quote:
Originally Posted by ausastronomer View Post

BTW. Did you clean the screw heads with steel wool, or soak them in vinegar ?

Cheers
John B
I ran them over the brass wire wheel in my drill press .... very gently.

Cleaned up nicely.

Col...
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  #8  
Old 11-11-2021, 08:03 AM
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Rings request answered in trade section
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  #9  
Old 11-11-2021, 02:06 PM
ausastronomer (John Bambury)
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Quote:
Originally Posted by FlashDrive View Post
I ran them over the brass wire wheel in my drill press .... very gently.

Cleaned up nicely.

Col...
Yep that works as well.

I've also used a really small wire brush on my dremmel, which also works well.

Cheers,
John B
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  #10  
Old 12-11-2021, 08:10 AM
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Be careful with "brass" wire wheels - they 99% of the time are merely brass coated steel. If it is a really stiff wire, you do NOT want it near chrome plated parts etc. I hate to say it, but I do see wire wheel paint enamel removal near the focuser flange

To properly restore soft parts and chrome/chrome plated/nickel plated, use a Dremel mini soft stainless wheel or a jeweller's brass wire wheel - which is genuine brass and is so soft you can literally put your fingers against it while spinning and it won't hurt.

I've been using a jeweller's brass wheel for decades for many restoration projects. It takes longer, but it's worth it. It will barely even scratch gold (what it's designed to not do)


Below is the wheel - this one is about 3 years of use. I buy them online from a jewellers supply in either Brisbane or Perth.
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  #11  
Old 12-11-2021, 12:51 PM
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Rainmaker (Matt)
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Lovely scope Poppy!
Should show nice views at F16.
I have a couple of F15 brass refractors (3.25” & 4”)
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  #12  
Old 12-11-2021, 07:32 PM
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Lovely scope Poppy!
Should show nice views at F16.
I have a couple of F15 brass refractors (3.25” & 4”)

Thanks Matt ... I'll do my best on this one also ..looking forward to the completion of it.
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  #13  
Old 13-11-2021, 01:29 PM
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Did the Tube today with various grades of Wet and Dry ... finished it off with 2000 fine paper.

Dew Shield yet to be done

Col....
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  #14  
Old 13-11-2021, 06:33 PM
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The Mekon (John Briggs)
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Colin,

Have you got the whole telescope + box or just the OTA? I owned one of these Royal Astro 3" F16 refractors back when I was very young. I think I bought it in 1969, a used scope from the "Amateur Astronomers Supply Company" in Crow Nest. At that time new scopes were $195 but I paid $125 for a used scope trading in my 3" reflector. The mount was quite a nice affair being able to used in Alt/Az or equatorial form. Also the scope had a draw tube focuser but I am not sure if yours has one, perhaps being modified over the years.
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  #15  
Old 13-11-2021, 06:47 PM
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Quote:
Originally Posted by The Mekon View Post
Colin,

Have you got the whole telescope + box or just the OTA? I owned one of these Royal Astro 3" F16 refractors back when I was very young. I think I bought it in 1969, a used scope from the "Amateur Astronomers Supply Company" in Crow Nest. At that time new scopes were $195 but I paid $125 for a used scope trading in my 3" reflector. The mount was quite a nice affair being able to used in Alt/Az or equatorial form. Also the scope had a draw tube focuser but I am not sure if yours has one, perhaps being modified over the years.
No....just the OTA ....wish it did have the original box ...!!
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  #16  
Old 13-11-2021, 07:07 PM
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A bit of info for you Col
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  #17  
Old 13-11-2021, 07:18 PM
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FlashDrive (Poppy)
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A bit of info for you Col
Many thanks Steve I'm sure ....
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  #18  
Old 15-11-2021, 11:23 AM
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FlashDrive (Poppy)
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Tube is now finished ... great result ....!!
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  #19  
Old 15-11-2021, 12:00 PM
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Nice Pops
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  #20  
Old 15-11-2021, 04:04 PM
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FlashDrive (Poppy)
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Almost there.......only the Dew shield and Finder to go ...!!

Col...
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