Author Topic: Stellafane Mirror Making Class - 6" F/9 Equatorial Pipe Mount Newt  (Read 378 times)

Alex Strouth

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So I'm going to the Stellafane mirror making class this fall and following spring.  My 6" f/8 Dob is almost done, and I do not really need a clone.  After some reading, I've decided on the idea of a 6" F/9 Newtonian on a Sam Brown pipe bracket and based from Gary Seronik's Big Red One.  I initially meant to convert my 6" f/8 "Lucy" to an equatorial edition, however it's just as economical to just make a new scope.  Besides, I enjoy the ease using a Dob.

Ideas?



Michael Presley

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Re: Stellafane Mirror Making Class - 6" F/9 Equatorial Pipe Mount Newt
« Reply #1 on: December 27, 2017, 10:26:45 AM »
Sounds like a plan to me....two scopes are always better than one

Bilal Luck

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Re: Stellafane Mirror Making Class - 6" F/9 Equatorial Pipe Mount Newt
« Reply #2 on: December 28, 2017, 11:56:08 AM »
I drew up a 6in 10 on something I stole from richard berry's book, the ra could be geared...

https://3dwarehouse....16d61f02994d4a7

stancacoho

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Re: Stellafane Mirror Making Class - 6" F/9 Equatorial Pipe Mount Newt
« Reply #3 on: December 30, 2017, 03:09:27 PM »
I think if you make some simple provision for rotating the tube so the eyepiece is easily accessible, you'll be surprised how much you will like the pipe mount.

Richard Acosta

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Re: Stellafane Mirror Making Class - 6" F/9 Equatorial Pipe Mount Newt
« Reply #4 on: January 04, 2018, 01:10:03 PM »
Quote
Sounds like a plan to me....two scopes are always better than one

And the best part is that I can go over to the refractor nuts and show them that my $600 Newt is better than their Takahashi....

Mike Khan

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Re: Stellafane Mirror Making Class - 6" F/9 Equatorial Pipe Mount Newt
« Reply #5 on: January 08, 2018, 02:54:49 PM »
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<p class="citation">GShaffer, on 22 Jun 2016 - 12:06 AM, said:<a href="https://www.cloudynights.com/index.php?app=forums&amp;module=forums&amp;section=findpost&amp;pid=7286987" rel="citation">[/url]<blockquote class="ipsBlockquote built" data-time="1466546761" data-cid="7286987" data-author="GShaffer">Sounds like a plan to me....two scopes are always better than one
And the best part is that I can go over to the refractor nuts and show them that my $600 Newt is better than their Takahashi....[/quote]I have a 6.7" f/9.2 build underway using a window instead of a spider for that purpose also although just the window is a little over double that since I am not interested in trying to make it

liomocharla

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Re: Stellafane Mirror Making Class - 6" F/9 Equatorial Pipe Mount Newt
« Reply #6 on: January 08, 2018, 02:59:59 PM »
Quote
Quote

Quote

<p class="citation">GShaffer, on 22 Jun 2016 - 12:06 AM, said:<a href="https://www.cloudynights.com/index.php?app=forums&amp;module=forums&amp;section=findpost&amp;pid=7286987" rel="citation">[/url]<blockquote class="ipsBlockquote built" data-author="GShaffer" data-cid="7286987" data-time="1466546761">
Sounds like a plan to me....two scopes are always better than one
And the best part is that I can go over to the refractor nuts and show them that my $600 Newt is better than their Takahashi....


I have a 6.7" f/9.2 build underway using a window instead of a spider for that purpose also although just the window is a little over double that since I am not interested in trying to make it
But with a curved spider the diffraction is barely noticeable, and a tiny secondary does not need a thick spider.

Kenneth Brown

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Re: Stellafane Mirror Making Class - 6" F/9 Equatorial Pipe Mount Newt
« Reply #7 on: January 09, 2018, 11:50:58 PM »
Quote
Quote
<p class="citation">GShaffer, on 22 Jun 2016 - 03:04 AM, said:<a href="https://www.cloudynights.com/index.php?app=forums&amp;module=forums&amp;section=findpost&amp;pid=7287220" rel="citation">[/url]<blockquote class="ipsBlockquote built" data-time="1466557454" data-cid="7287220" data-author="GShaffer"><p class="citation">Augustus, on 22 Jun 2016 - 02:50 AM, said:<a href="https://www.cloudynights.com/index.php?app=forums&amp;module=forums&amp;section=findpost&amp;pid=7287195" rel="citation">[/url]<blockquote class="ipsBlockquote built" data-time="1466556640" data-cid="7287195" data-author="Augustus"><p class="citation">GShaffer, on 22 Jun 2016 - 12:06 AM, said:<a href="https://www.cloudynights.com/index.php?app=forums&amp;module=forums&amp;section=findpost&amp;pid=7286987" rel="citation">[/url]<blockquote class="ipsBlockquote built" data-time="1466546761" data-cid="7286987" data-author="GShaffer">Sounds like a plan to me....two scopes are always better than one
And the best part is that I can go over to the refractor nuts and show them that my $600 Newt is better than their Takahashi....
I have a 6.7" f/9.2 build underway using a window instead of a spider for that purpose also although just the window is a little over double that since I am not interested in trying to make it [/quote]But with a curved spider the diffraction is barely noticeable, and a tiny secondary does not need a thick spider.[/quote]No argument there....this is a "just because" thing for the most part lol

Jesse Kaine

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Re: Stellafane Mirror Making Class - 6" F/9 Equatorial Pipe Mount Newt
« Reply #8 on: January 10, 2018, 07:55:15 AM »
Quote
So I'm going to the Stellafane mirror making class this fall and next spring. My 6" f/8 Dob is almost done, and I don't really want a clone. So after some reading, I have decided on the idea of a 6" F/9 Newtonian on a Sam Brown pipe mount and based off of Gary Seronik's Big Red One. I originally intended to convert my 6" f/8 "Lucy" to an equatorial version, however it's just as cheap to just make a new scope. Besides, I like the ease of use of a Dob.

Thoughts?

Any considereation for a 6" f/8 bino-scope?

alnepensa

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Re: Stellafane Mirror Making Class - 6" F/9 Equatorial Pipe Mount Newt
« Reply #9 on: January 10, 2018, 09:40:17 PM »
Quote
Quote

So I'm going to the Stellafane mirror making class this fall and next spring. My 6" f/8 Dob is almost done, and I don't really want a clone. So after some reading, I have decided on the idea of a 6" F/9 Newtonian on a Sam Brown pipe mount and based off of Gary Seronik's Big Red One. I originally intended to convert my 6" f/8 "Lucy" to an equatorial version, however it's just as cheap to just make a new scope. Besides, I like the ease of use of a Dob.

Thoughts?

Any considereation for a 6" f/8 bino-scope?
I have no interest in binoscopes or binoviewing. I can barely afford ONE crappy eyepiece at each focal length.

seucamthepo

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Re: Stellafane Mirror Making Class - 6" F/9 Equatorial Pipe Mount Newt
« Reply #10 on: January 11, 2018, 09:24:53 AM »
I made a pipe mount years ago for my 6 inch based on Sam Brown's design , it worked well but weighed a ton .

Have fun and look forward to seeing yours at Stellafane when you get it finished!

Norm

Nathan Harper

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Re: Stellafane Mirror Making Class - 6" F/9 Equatorial Pipe Mount Newt
« Reply #11 on: January 12, 2018, 02:48:34 AM »
Quote
I made a pipe mount years ago for my 6 inch based on Sam Brown's design , it worked well but weighed a ton .

Have fun and look forward to seeing yours at Stellafane when you get it finished!

Norm

It won't be until the next convention, thanks, but hopefully my Dob will be this year.

How much does it weigh and how much does the mount cost?

sremburjuni

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Re: Stellafane Mirror Making Class - 6" F/9 Equatorial Pipe Mount Newt
« Reply #12 on: January 13, 2018, 04:16:56 AM »
Groski made a pretty cool adaption to the pipe mount and can be used in either the alt/az or gem version of the pipe mount.

he calls it the Delmarva mount. basically he runs the pipe thru the t-ees and compresses Teflon to create a slip clutch for creating adjustable tension on both ra and dec axisessess.

http://www.cloudynig...rva-pipe-mount/

David Reynolds

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Re: Stellafane Mirror Making Class - 6" F/9 Equatorial Pipe Mount Newt
« Reply #13 on: January 13, 2018, 05:13:44 AM »
Danny,
 Thanks for bring up my design. It is very easy to make requiring no machining. It uses a couple of 1/1/4 to 3/4 PVC reducers. The 3/4" thread are drilled out but that hole doesn't need to a precision cut since it's not the bearing surface. You then make two cuts are 90 degrees thru the threads on the back of the reducer so they can be compressed as you screw the reduced into the pipe tee. Inside the reduced you place a strip of Teflon that is about 1/8" thick. As you screw in the PVC reducer it clamps down evenly on the Teflon and the Teflon clamps down around the 3/4" pipe used as the shaft. The result is a very smooth motion in which you can easily adjust the amount of friction by screwing in the reducer more or less in to the tee and the shaft can continuously rotate thru 360 degrees unlike the Sam Brown version in which the bearing are the pipe thread which will unscrew and have a play in them.
See my Nov 2012 Sky and Tel article for more details.

      - Dave

omunsopoo

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Re: Stellafane Mirror Making Class - 6" F/9 Equatorial Pipe Mount Newt
« Reply #14 on: January 13, 2018, 05:56:11 AM »
Quote
Quote

I made a pipe mount years ago for my 6 inch based on Sam Brown's design , it worked well but weighed a ton .

Have fun and look forward to seeing yours at Stellafane when you get it finished!

Norm

It won't be until the next convention, thanks, but hopefully my Dob will be this year.

How much does it weigh and how much does the mount cost?
I built it probably 35 years ago so I don't remember the particulars but it was HEAVY...didn't cost much as I was able to source scrap shafts and the stand (which was metal) from work for free. I gave it to a friend of mine who needed a mount and he has since passed away so not sure what happened to it since then . I took it over to Stellafane in 1980 for the convention with my 6 " scope.
Norm