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Cave Mirror Registry

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#901 apfever

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Posted 14 February 2019 - 08:24 PM

185 R  might be a spherical radius. That would be a focal length of 92.5" so perhaps a double check of the numbers.

185 R  might have been a spherical radius REFERENCE before figuring, thus the difference in actual final focal length after figuring.

just a thought.



#902 chill4

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Posted 08 March 2019 - 01:08 PM

Hello,
I just joined this community through the link from cave-astrola.com. Thought I'd register the mirror on my 1974 Model D Transportable.

Mirror size 12.5"
Serial number is M749686
F/6
74 3/16" focal length
Dated Oct 3, 1974
Writing is cursive

 

I took some pictures in 2014 when I had it re-finished. Not very good, but it does validate the mirror. I'll try again next time I have the mirror out. Also attached one of the scope and a perhaps interesting one of initials and date on the worm wheel mount housing. Dated 9-74 on a 10-3-74 scope suggests it's a Cave employee.

 

Thanks for the archive recording.

 

Curt Hill

 

I tried to get my file sizes to total less than 500KB, but not successful. I hope you don't mind 2 added postings

Attached Thumbnails

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#903 chill4

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Posted 08 March 2019 - 01:09 PM

Here is the Model D

 

Curt

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  • Model D Transportable.jpg

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#904 chill4

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Posted 08 March 2019 - 01:10 PM

....and the gear inscription

 

Curt

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#905 PiSigma

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Posted 08 March 2019 - 08:14 PM

Thank you for the addition to the registry and welcome to the Classic Telescope forum Curt. I'll have it added to the next edition which I'll probably post in a month or so.

 

That is the first time I have seen such an engraving on the RA clutch. Some of the details like this that we keep finding as the registry grows are very interesting. I wonder who EFB was?



#906 GTH73

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Posted 15 April 2019 - 09:07 PM

I have two mirrors.   #1 is a 10 inch f/7   M749631  (Block Print Cave Optical Co.) Sept 24 1971

                                 #2 is a 12.5 inch f/6 M727202 (Cursive Cave Optical Co.) Mar. 27 1972

 

I'm working on the pictures

 

 

Greg



#907 PiSigma

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Posted 16 April 2019 - 09:02 PM

Hello Greg and welcome to the Cloudy Nights Classic Telescope forum!

 

Thank you for the two new additions to the registry.

 

Is the date on M749631 actually Sept 24 1974 and not 1971? The 74 after the M indicates it was made in 1974 and the number sequence fits into 1974 also. I just want to confirm.

 

And yes, if you get some pictures that would be great. I like those for my records. Are either of these mirrors in complete telescopes?

 

It has been a few months since my last update. I will get one posted here soon that will include your mirrors.



#908 arachman

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Posted 11 May 2019 - 11:06 AM

Hello,

 

Here is what I believe will be a new mirror for your registry.

 

It is an 8" F7 and I think it is a Lightweight Deluxe.

55 11/16" FL, Serial Number M705303 dated May 20 1970

 

It is the one you might have seen for sale on Astromart with the bumblebee

paint job. I was helping the owner to sell it but everyone making an offer wanted it shipped or delivered and he didn't want to do that. So he offered it to me and I couldn't resist. The nontraditional paint job is unusual but professionally done and beautiful in person.

 

Anyway, photos are attached.

 

Thanks

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  • Cave Mirror #1.jpg
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#909 CHASLX200

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Posted 11 May 2019 - 04:44 PM

Hello,

 

Here is what I believe will be a new mirror for your registry.

 

It is an 8" F7 and I think it is a Lightweight Deluxe.

55 11/16" FL, Serial Number M705303 dated May 20 1970

 

It is the one you might have seen for sale on Astromart with the bumblebee

paint job. I was helping the owner to sell it but everyone making an offer wanted it shipped or delivered and he didn't want to do that. So he offered it to me and I couldn't resist. The nontraditional paint job is unusual but professionally done and beautiful in person.

 

Anyway, photos are attached.

 

Thanks

Should be a killer mirror.



#910 PiSigma

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Posted 12 May 2019 - 09:52 PM

Hello,

 

Here is what I believe will be a new mirror for your registry.

 

It is an 8" F7 and I think it is a Lightweight Deluxe.

55 11/16" FL, Serial Number M705303 dated May 20 1970

 

It is the one you might have seen for sale on Astromart with the bumblebee

paint job. I was helping the owner to sell it but everyone making an offer wanted it shipped or delivered and he didn't want to do that. So he offered it to me and I couldn't resist. The nontraditional paint job is unusual but professionally done and beautiful in person.

 

Anyway, photos are attached.

 

Thanks

Thank you for the addition. I am way overdue to publish an update to the registry. I will get to it in the next day or two and yours will be in there.

 

The easiest way to tell a Lightweight from a standard mount is to measure the diameter of either the dec. or RA shafts. 1.0" = Lightweight, 1.5" = standard. 



#911 PiSigma

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Posted 08 June 2019 - 11:44 AM

We have 6 new mirrors and I'm way overdue for an update so it is time for a new edition.

 

Changes from the 1/20/2019 edition are highlighted in yellow.

 

Cell in red is an entry where I hope to someday verify the date as it doesn't make sense. This was in the description of a Craig's List ad that is long gone. If anyone ever bought mirror 1368 I would really appreciate a picture of it.

 

Cave Mirror Registry 6/8/2019

 

Be sure to refresh the page if you've visited before otherwise you may be viewing a previous version.

 

A total of 281 mirrors are now in the registry.


Edited by PiSigma, 08 June 2019 - 11:44 AM.

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#912 KentTolley

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Posted 10 June 2019 - 12:16 PM

That is the first time I have seen such an engraving on the RA clutch. Some of the details like this that we keep finding as the registry grows are very interesting. I wonder who EFB was?

Could that be Ed Beck?


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#913 YourNotSirius

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Posted 22 June 2019 - 09:04 AM

Apparently, we have an undocumented Cave 8" f/7 in our hands. It belongs to the Alvirne High School in the town of Hudson, New Hampshire. We have it here for a cleaning and (if needed) restoration. I will attach photos later. At this time, we do not know the exact model. Everything is painted Battleship Grey except the counterweights which are chrome plated. It has casters on the feet but no provision for leveling screws. The tube rotates and the focusing unit has a sliding sleeve in the main tube. At some point it did have a guide scope attached but, that is long gone.

 

I did manage get the following information from the side of the mirror.

 

R683913

Cave Optical Co.

F/7 - 54" F/L  DEC-17-1968
 

The writing is very hard to read since it is very lightly done. I will try to get some good images of the lettering later. The coating is shot so it will need to be done over.

 

This is another case of a fine telescope being put into storage and forgotten for 25 plus years. No one knows when it was last used. The school wishes to bring it back into service.

 

From what we can tell the entire instrument is in near perfect condition and has had no modifications done to it at all. With the exception of some slightly corroded screws and some scuffed paint, everything appears to be in original condition.

 

I will post photos and more details as time will allow.

 

Oh. I guess whoever is in charge of updating the registry should enter this one into it. lol

 

Thanks,

 

Q


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#914 PiSigma

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Posted 24 June 2019 - 08:25 AM

Thank you for the addition to the registry. I will have it added to the next edition. Some pictures, especially of the engraving would be great when you have time. A new thread about its restoration would be wonderful also. There are several of us on this forum that are very familiar with Caves and can help with any questions you may have.

 

The interesting thing about this Cave's serial number is the R at the beginning indicates it was a Cave refigured mirror. Since it is in a complete Cave scope my guess is someone tried making their own and weren't happy with the results, sending the mirror to Cave for refigure and installation in a complete new Cave.



#915 YourNotSirius

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Posted 25 June 2019 - 11:34 AM

Okay! I have finally managed to get some reasonably good photos of the scope and mirror. Let's see how many I can get to fit in one message. LOL

 

Q

 

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#916 YourNotSirius

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Posted 25 June 2019 - 11:43 AM

Take two! More photos.

 

Q

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#917 YourNotSirius

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Posted 25 June 2019 - 11:48 AM

As you can see the mirror cleaned up nicely. Unfortunately, the coating is no good as you can see in the photo.

Q

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#918 YourNotSirius

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Posted 25 June 2019 - 11:49 AM

Last images for the day.

 

Q

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#919 tim53

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Posted 26 June 2019 - 09:14 AM

The coatings don't look bad enough to worry about for a while, I think.

 

Nice scope!  



#920 PiSigma

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Posted 26 June 2019 - 06:58 PM

That does look very original. The chrome plated counterweights are a bit unusual along with the fact that there are four of them. That looks like a lot of counterweight! The model is what Cave called a Lightweight Deluxe since it has 1" shafts vs. the 1.5" diameter shafts of the standard models.

 

The serial number looks like R68391

 

I agree with Tim, the coating does not look too bad.

 

A nice unmolested Cave! 


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#921 YourNotSirius

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Posted 29 June 2019 - 04:32 PM

Thank you for the information that you have provided. The school wishes to have a new and better coating placed on the mirror. I plan on sending it off to Spectrum unless anyone has a better idea or supplier. The company said that it would be about a 30 day lead time for turn around.

 

Oh. Upon closer examination I discovered more holes down by the mirror end of the tube. They appear to be for either another finder scope or maybe, a guide scope. We are reasonably certain that the holes near the eye piece end were indeed for a guide scope. The size of the marks and the distance between them is what makes us believe that to be true. Again, any comments are most welcome.

 

Thanks,

 

Q



#922 PiSigma

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Posted 29 June 2019 - 06:26 PM

I can recommend Majestic Coatings. They usually have a quick turn around, their work is excellent and pricing is very reasonable. Jeff Decker there is great to deal with.

 

https://www.majestic-coatings.com/



#923 dmilner

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Posted 04 July 2019 - 02:39 PM

Cave Mirror (3).jpg Cave Telescope (3).jpg

 

This is a Model C Deluxe 10" f/7 Astrola.  I worked 2 summers while in high school and bought this telescope my senior year.  I'm now 61.  I still use it along with my other telescopes.  The mirror was "resilvered" a few years ago.

 

Serial # M751216

FL: 70 1/16"

Made: Nov 28, 1975

 

Dennis


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#924 PiSigma

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Posted 04 July 2019 - 09:41 PM

Very Nice! Thank you for the addition to the registry. It will be in the next update I publish, which I try and do every 3 months or 6 new mirrors.

 

A 10" Cave was my dream telescope in 1975.




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