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What did you do to your Scope/Mount Today?

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#3876 Joe1950

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Posted 21 November 2018 - 05:45 PM

I wonder if early humans had specialists in cave restorations....

 

 

"Oh, I love what you've done with those original wall paintings. May I suggest, though, that we move away from the cold gray walls and do something a bit more contemporary?"

 

"Mmmm"

 

"Perhaps, to pick up the paintings we can use something in the sage family. Sage is such a delicate neutral which is a great backdrop for today’s cave.

 

"Uhhhhh."

 

"And... I think a muted red... yes, Venetian red as an accent color? Oh, it would be perfect to really energize the room."

 

"Mmmmm!"


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#3877 k5apl

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Posted 21 November 2018 - 05:59 PM

Webp.net-resizeimage (31).jpg I received my bronze bearing shaft and knurled brass screws from McMaster Carr today.  They strengthened my

focuser shaft to hold the diagonal more securely.  With shipping it was under $20 and now I feel more secure since my diagonal and eyepiece are more secure.

Wes


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#3878 Chuck Hards

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Posted 21 November 2018 - 06:08 PM

Today I finished restoring the finder for the R-61D.  Well, almost, I still have to replace the cross-hairs but that's not difficult.  I have some super-fine stainless steel wire around here for that although I've used my own hair when I wanted thick, heavy cross-hairs.  The wire is much finer.

 

About the only really rashed component on the scope was the finder paint.  Here's the before pic:

 

Finder 001a.jpg

 

I apologize for no in-process shots but this was a "stolen moments" project at work over the last week, on breaks and lunch, a few minutes a day.  I rarely have my phone on my person so when I find myself with a few minutes at the bench, it's either get the work done or go find the phone, lol.  

 

Here is the after pic:

 

Finder 002a.jpg

 

My standard procedure is to sand off all the old paint, down to clean metal, both tube and dewcap.  Small tubing pieces are easy in the mini-lathe.  Then a thin coat of etching primer allowed to dry for a couple of days, then a coat of white sanding primer, also allowed to fully cure for a few days.  Finally I spray on what I call my "Unitron" white match, it's a modern white toned-down with quite a bit of black.  It's a catalyzed automotive paint and I use a bit of accellerator so that it's dry to the touch in twenty minutes.  I baked it for an hour and after it was cool it was ready for wet-sanding with 2000 grit to take off the orange peel, then polished to a water-wet surface with a #2 polish and a can of elbow grease.  Old denim makes the best final buffing pad, rubbed until the part is warm from friction.  Always by hand so there are no machine-generated swirl marks.  Finder tubes are a breeze, but big OTAs four and five feet long can really build some muscles during sanding and buffing, lol.

 

Installed back on the main OTA.  You can't see it but there is some white plastic tape wraped around the finder tube at the setscrew locations, as well as where it exits the bracket in the front.  No new scratches wanted!

 

015.jpg

 

 

While I was at it, I lined up some of my Vixen focuser extensions, the ones no longer available.  I'm using a short one on the Astro but you can see that they were made in several lengths, my longest is 3".  The grey one is borrowed from an HOC Manon, the two shortest ones were Tasco accessories originally, I believe.  The HOC has twice the wall thickness of the more modern ones but the thread is the same.  I think I'm going to look into having a batch of these made up after the holidays.

 

Astro R-61D 60mm f/20 set up for 1.25".  Dielectric diagonal, UO eyepiece. 

 

013.jpg

 

 

 

 

 

 

 

 

 

 


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#3879 clamchip

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Posted 21 November 2018 - 06:42 PM

I wonder if early humans had specialists in cave restorations....

 

 

"Oh, I love what you've done with those original wall paintings. May I suggest, though, that we move away from the cold gray walls and do something a bit more contemporary?"

 

"Mmmm"

 

"Perhaps, to pick up the paintings we can use something in the sage family. Sage is such a delicate neutral which is a great backdrop for today’s cave.

 

"Uhhhhh."

 

"And... I think a muted red... yes, Venetian red as an accent color? Oh, it would be perfect to really energize the room."

 

"Mmmmm!"

Astrola does really neat wall paintings and her sister nurse Mendy really knows telescopes

 

post-50896-0-38406000-1438012988.jpg

post-50896-0-26368100-1466035528_thumb.jpg


Edited by clamchip, 21 November 2018 - 06:47 PM.

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#3880 Joe1950

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Posted 21 November 2018 - 07:23 PM

You never fail to come through, Robert!  lol.gif


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#3881 wrnchhead

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Posted 21 November 2018 - 09:07 PM

My restored Ralph Dakin 4" F10 is back & ready for planet-killing:

 

What a great looking instrument!


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#3882 Bomber Bob

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Posted 21 November 2018 - 10:34 PM

Thanks, the Dakin 4 is even better to look through.  No idea where the lens came from, but he built a first-rate OTA around it.  Nothing fancy, but everything works, and the views are fantastic.


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#3883 Geo31

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Posted 22 November 2018 - 08:41 AM

Today I finished restoring the finder for the R-61D.  Well, almost, I still have to replace the cross-hairs but that's not difficult.  I have some super-fine stainless steel wire around here for that although I've used my own hair when I wanted thick, heavy cross-hairs.  The wire is much finer.

 

About the only really rashed component on the scope was the finder paint.  Here's the before pic:

 

attachicon.gif Finder 001a.jpg

 

   <snip>

 

 

You can't see it but there is some white plastic tape wraped around the finder tube at the setscrew locations, as well as where it exits the bracket in the front.  No new scratches wanted!

Beautiful job as usual Chuck.  Wow.

 

For protecting where the screws are, get some of this leading edge tape (colloquially known as "helicopter tape").  This particular tape is clear and non-yellowing.  It's tough stuff used to protect the leading edges of aerodynamic surfaces on aircraft, originally designed for the leading edges of helicopter rotors.  In small quantities, it's pretty cheap.

 

https://www.aircraft...?clickkey=73315


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#3884 clamchip

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Posted 22 November 2018 - 04:39 PM

Yesterday I spent about 2 hours looking for a 1/4"-20 x 2-1/2" hex head bolt.

I had one but need 2 and I can't believe I could not find a second here at camp Clamchip.

I did make a special trip to buy one yesterday, and then today I changed my mind and

didn't need them after all!

 

Robert


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#3885 Michael Covington

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Posted 22 November 2018 - 04:56 PM

Yesterday I spent about 2 hours looking for a 1/4"-20 x 2-1/2" hex head bolt.

I had one but need 2 and I can't believe I could not find a second here at camp Clamchip.

I did make a special trip to buy one yesterday, and then today I changed my mind and

didn't need them after all!

 

Robert

Things like that happen to me!



#3886 roscoe

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Posted 22 November 2018 - 07:48 PM

Yesterday I spent about 2 hours looking for a 1/4"-20 x 2-1/2" hex head bolt.

I had one but need 2 and I can't believe I could not find a second here at camp Clamchip.

I did make a special trip to buy one yesterday, and then today I changed my mind and

didn't need them after all!

 

Robert

Oh good, now you're clear to find 3 or 4 of 'em....


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#3887 steve t

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Posted 23 November 2018 - 12:37 PM

I've noticed that since adding a 12" extension to my 4" scope that the high 7frequency vibrations have increased. I believe the vibration is coming from the four 1/4" threaded rods used to bolt the extension and pier cap to the original tripod hub.

Once recovered from my turkey coma this morning, I decided to see if adding a crude damper to rods would improve things.

Attached is photo of the tripod head with the threaded rods installed.

 

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Edited by steve t, 23 November 2018 - 12:44 PM.

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#3888 steve t

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Posted 23 November 2018 - 12:39 PM

This photo shows the damper installed

 

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#3889 steve t

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Posted 23 November 2018 - 12:41 PM

This photo shows the pier fully assembled 

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#3890 steve t

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Posted 23 November 2018 - 12:43 PM

This last photo shows the scope fully  assembled (some day I need to get it painted)

 

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#3891 ziridava

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Posted 23 November 2018 - 01:10 PM

Steve

 

I believe the damper will help.

It is possible to have further vibrations but  of higher frequencies.

I would try this :

-put the extension in place.

-laid a piece of sponge at the bottom

-fill in the cavity with ping pong balls or similar

-laid another sponge on top

-the stuffing should not be very crammed

-do the final assembly

 

Vibration is best ''eaten'' by the friction between many small bodies.

Sand is an ideal damper but it is too heavy.

 

Your telescope is very cute.

 

Good luck , Ziridava


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#3892 steve t

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Posted 23 November 2018 - 03:09 PM

Hi Ziridava,

Great idea, I may give your suggestion a try if this doesn't work.

 

Thanks for the compliment,  this little scope has been with me 1973. It is so convenient to use,  I've found over the past summer that I've been using it more often than my larger ones.

 

Steve T 



#3893 terraclarke

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Posted 23 November 2018 - 07:40 PM

You certainly have a lovely little scope there Steve. It looks great on that mount.


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#3894 steve t

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Posted 23 November 2018 - 08:41 PM

Hi Terra,

Thanks for the compliment.  

Steve T


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#3895 TOM KIEHL

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Posted 24 November 2018 - 11:22 AM

Some Assembly Required !

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#3896 DMala

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Posted 24 November 2018 - 12:57 PM

It looks like new!
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#3897 Lola Bruce

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Posted 24 November 2018 - 12:58 PM

If the long bolts are pulled tight to compress the pillar tube then they are probably not you culprit. The joints between the legs and the hub is highly suspect. Try tightening the leg pivots to very snug. If that works you will need something like wing nuts for field use. With a column that tall the setup will never be as stiff as it once could be.

Bruce


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#3898 DMala

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Posted 24 November 2018 - 01:02 PM

Maybe it is a stupid thought, but I wonder if airsoft pellets would be a good filler for steve t's pier.
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#3899 Chuck Hards

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Posted 24 November 2018 - 03:54 PM

Maybe it is a stupid thought, but I wonder if airsoft pellets would be a good filler for steve t's pier.

You're on the right track, but think bigger.  Rubber "mulch" chunks, the kind sold for playgrounds today instead of sand.   I think they are chunked and shredded old tires.


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#3900 Kasmos

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Posted 24 November 2018 - 04:01 PM

Some Assembly Required !

Wow! 

Cave? What kind of paint?


Edited by Kasmos, 24 November 2018 - 04:02 PM.

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