Looks like the commercial advertising for the eclipse in Utah has started. This showed up in my snail mailbox yesterday: http://users.wirelessbeehive.com/~paw/temp/eclipse001.pdf patrick
"One of the few locations in the world" Chuckle. KSL ran a story yesterday that included the mayor of Kannaraville, who stated he expected "busloads" of people from southern Cal and Salt Lake City. They even showed the field where they are going to herd everyone. He is even now contracting for enough porta-potties for five-thousand people on that field. I'm thinking that the general public might get the idea that this happens every year, due to the word "annular". LOL! On Wed, Feb 22, 2012 at 2:05 AM, Patrick Wiggins <paw@wirelessbeehive.com>wrote:
Looks like the commercial advertising for the eclipse in Utah has started. This showed up in my snail mailbox yesterday:
I might just have to drive-by the location to see if it lives up to the hype. Seems the "busloads" of people is already a likely misconception. The Abbey Inn seems to be quoting what seems to be a typical rate for Cedar City rooms.
"One of the few locations in the world" Chuckle.
KSL ran a story yesterday that included the mayor of Kannaraville, who stated he expected "busloads" of people from southern Cal and Salt Lake City. They even showed the field where they are going to herd everyone. He is even now contracting for enough porta-potties for five-thousand people on that field.
I'm thinking that the general public might get the idea that this happens every year, due to the word "annular". LOL!
On Wed, Feb 22, 2012 at 2:05 AM, Patrick Wiggins <paw@wirelessbeehive.com>wrote:
Looks like the commercial advertising for the eclipse in Utah has started. This showed up in my snail mailbox yesterday:
_______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
Send messages to the list to Utah-Astronomy@mailman.xmission.com
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Looking at Google Maps, it appears that the Kannaraville cemetery will be an excellent viewing spot. It may not have very many porta-potties though. On Feb 22, 2012, at 7:09 AM, Chuck Hards wrote:
"One of the few locations in the world" Chuckle.
KSL ran a story yesterday that included the mayor of Kannaraville, who stated he expected "busloads" of people from southern Cal and Salt Lake City. They even showed the field where they are going to herd everyone. He is even now contracting for enough porta-potties for five-thousand people on that field.
I'm thinking that the general public might get the idea that this happens every year, due to the word "annular". LOL!
On Wed, Feb 22, 2012 at 2:05 AM, Patrick Wiggins <paw@wirelessbeehive.com>wrote:
Looks like the commercial advertising for the eclipse in Utah has started. This showed up in my snail mailbox yesterday:
solidifies my decision to head to California for the event! On Sat, Feb 25, 2012 at 8:27 PM, Gary Logan <gary@the-logans.net> wrote:
Looking at Google Maps, it appears that the Kannaraville cemetery will be an excellent viewing spot. It may not have very many porta-potties though.
On Feb 22, 2012, at 7:09 AM, Chuck Hards wrote:
"One of the few locations in the world" Chuckle.
KSL ran a story yesterday that included the mayor of Kannaraville, who stated he expected "busloads" of people from southern Cal and Salt Lake City. They even showed the field where they are going to herd everyone. He is even now contracting for enough porta-potties for five-thousand people on that field.
I'm thinking that the general public might get the idea that this happens every year, due to the word "annular". LOL!
On Wed, Feb 22, 2012 at 2:05 AM, Patrick Wiggins < paw@wirelessbeehive.com>wrote:
Looks like the commercial advertising for the eclipse in Utah has started. This showed up in my snail mailbox yesterday:
_______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
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-- Chrismo I fix things, all kinds of things... Club Allure Sandy, UT (801) 897-9075
For anyone wanting to come to the best place in Utah for the eclipse (i.e. Bryce Canyon National Park) it may be too late for rooms at Ruby's. One of the managers there told me yesterday that Ruby's is already all booked for that week - a number of large tour groups have booked big blocks of rooms. Some group, from Europe, I think, even wanted to land a jumbo jet at our tiny airport. Of course, that ain't going to happen. I forgot to ask the manager if that included the Grand Hotel across the street or if camping was also all reserved. It would be worth a call to check, though. Bottom line: If you are interested in lodging in the area, (1) For SLAS members Kevin Poe was working on a block of reserved rooms at either Ruby's or the Hotel; (2) Try Foster's, The Pines, or one of the smaller motels in Panguitch, Tropic, Cannonville (also a KOA there), etc.; (3) Camp. Campsites here are, of course, first-come, first-served, except for the group site. I don't yet know, but I'm guessing that Kevin will have this reserved for SLAS again. There are also some improved Forest Service campsites in the area. Disclaimer: To be clear, as a Park employee I am NOT endorsing any of the places I mentioned - they are just possibilities. Sorry, my house will be full. :-( Kim -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Gary Logan Sent: Saturday, February 25, 2012 8:27 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Eclipse ad Looking at Google Maps, it appears that the Kannaraville cemetery will be an excellent viewing spot. It may not have very many porta-potties though. On Feb 22, 2012, at 7:09 AM, Chuck Hards wrote:
"One of the few locations in the world" Chuckle.
KSL ran a story yesterday that included the mayor of Kannaraville, who stated he expected "busloads" of people from southern Cal and Salt Lake City. They even showed the field where they are going to herd everyone. He is even now contracting for enough porta-potties for five-thousand people on that field.
I'm thinking that the general public might get the idea that this happens every year, due to the word "annular". LOL!
On Wed, Feb 22, 2012 at 2:05 AM, Patrick Wiggins <paw@wirelessbeehive.com>wrote:
Looks like the commercial advertising for the eclipse in Utah has started. This showed up in my snail mailbox yesterday:
Kim, you mentioned that the group campsite may be reserved for SLAS again. As a point of clarification, is it truly just for SLAS members, or for any telescope volunteer? Thanks, Mat -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Kim Sent: Monday, February 27, 2012 11:39 AM To: 'Utah Astronomy' Subject: Re: [Utah-astronomy] Eclipse ad For anyone wanting to come to the best place in Utah for the eclipse (i.e. Bryce Canyon National Park) it may be too late for rooms at Ruby's. One of the managers there told me yesterday that Ruby's is already all booked for that week - a number of large tour groups have booked big blocks of rooms. Some group, from Europe, I think, even wanted to land a jumbo jet at our tiny airport. Of course, that ain't going to happen. I forgot to ask the manager if that included the Grand Hotel across the street or if camping was also all reserved. It would be worth a call to check, though. Bottom line: If you are interested in lodging in the area, (1) For SLAS members Kevin Poe was working on a block of reserved rooms at either Ruby's or the Hotel; (2) Try Foster's, The Pines, or one of the smaller motels in Panguitch, Tropic, Cannonville (also a KOA there), etc.; (3) Camp. Campsites here are, of course, first-come, first-served, except for the group site. I don't yet know, but I'm guessing that Kevin will have this reserved for SLAS again. There are also some improved Forest Service campsites in the area. Disclaimer: To be clear, as a Park employee I am NOT endorsing any of the places I mentioned - they are just possibilities. Sorry, my house will be full. :-( Kim -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Gary Logan Sent: Saturday, February 25, 2012 8:27 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Eclipse ad Looking at Google Maps, it appears that the Kannaraville cemetery will be an excellent viewing spot. It may not have very many porta-potties though. On Feb 22, 2012, at 7:09 AM, Chuck Hards wrote:
"One of the few locations in the world" Chuckle.
KSL ran a story yesterday that included the mayor of Kannaraville, who stated he expected "busloads" of people from southern Cal and Salt Lake City. They even showed the field where they are going to herd everyone. He is even now contracting for enough porta-potties for five-thousand people on that field.
I'm thinking that the general public might get the idea that this happens every year, due to the word "annular". LOL!
On Wed, Feb 22, 2012 at 2:05 AM, Patrick Wiggins <paw@wirelessbeehive.com>wrote:
Looks like the commercial advertising for the eclipse in Utah has started. This showed up in my snail mailbox yesterday:
_______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Send messages to the list to Utah-Astronomy@mailman.xmission.com The Utah-Astronomy mailing list is not affiliated with any astronomy club. To unsubscribe go to: http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Then enter your email address in the space provided and click on "Unsubscribe or edit options".
I'm sure that you will have to be an official volunteer, i.e. pre-registered as such, not necessarily with SLAS or any other club, for that matter. Thanks for pointing that out to me - sorry for any confusion. Don Colton has coordinated volunteers and camping in the past, is he doing so again? If not, contact Kevin Poe at: kevin_poe@nps.gov. Kim -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Hutchings, Mat (H USA) Sent: Monday, February 27, 2012 9:46 AM To: Utah Astronomy Subject: Re: [Utah-astronomy] Eclipse ad Kim, you mentioned that the group campsite may be reserved for SLAS again. As a point of clarification, is it truly just for SLAS members, or for any telescope volunteer? Thanks, Mat
What no room for the Swedish Bikini Team at your place?
For anyone wanting to come to the best place in Utah for the eclipse (i.e.
Bryce Canyon National Park) it may be too late for rooms at Ruby's. One of the managers there told me yesterday that Ruby's is already all booked for that week - a number of large tour groups have booked big blocks of rooms. Some group, from Europe, I think, even wanted to land a jumbo jet at our tiny airport. Of course, that ain't going to happen. I forgot to ask the manager if that included the Grand Hotel across the street or if camping was also all reserved. It would be worth a call to check, though. Bottom line: If you are interested in lodging in the area, (1) For SLAS members Kevin Poe was working on a block of reserved rooms at either Ruby's or the Hotel; (2) Try Foster's, The Pines, or one of the smaller motels in Panguitch, Tropic, Cannonville (also a KOA there), etc.; (3) Camp. Campsites here are, of course, first-come, first-served, except for the group site. I don't yet know, but I'm guessing that Kevin will have this reserved for SLAS again. There are also some improved Forest Service campsites in the area.
Disclaimer: To be clear, as a Park employee I am NOT endorsing any of the places I mentioned - they are just possibilities.
Sorry, my house will be full. :-(
Kim
-----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Gary Logan Sent: Saturday, February 25, 2012 8:27 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Eclipse ad
Looking at Google Maps, it appears that the Kannaraville cemetery will be an excellent viewing spot. It may not have very many porta-potties though.
On Feb 22, 2012, at 7:09 AM, Chuck Hards wrote:
"One of the few locations in the world" Chuckle.
KSL ran a story yesterday that included the mayor of Kannaraville, who stated he expected "busloads" of people from southern Cal and Salt Lake City. They even showed the field where they are going to herd everyone. He is even now contracting for enough porta-potties for five-thousand people on that field.
I'm thinking that the general public might get the idea that this happens every year, due to the word "annular". LOL!
On Wed, Feb 22, 2012 at 2:05 AM, Patrick Wiggins <paw@wirelessbeehive.com>wrote:
Looks like the commercial advertising for the eclipse in Utah has started. This showed up in my snail mailbox yesterday:
_______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
Send messages to the list to Utah-Astronomy@mailman.xmission.com
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I guess my wife will be out of town that week after all. Kim -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of erikhansen@thebluezone.net Sent: Monday, February 27, 2012 4:14 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Eclipse ad
What no room for the Swedish Bikini Team at your place?
For anyone wanting to come to the best place in Utah for the eclipse (i.e.
Bryce Canyon National Park) it may be too late for rooms at Ruby's. One of the managers there told me yesterday that Ruby's is already all booked for that week - a number of large tour groups have booked big blocks of rooms. Some group, from Europe, I think, even wanted to land a jumbo jet at our tiny airport. Of course, that ain't going to happen. I forgot to ask the manager if that included the Grand Hotel across the street or if camping was also all reserved. It would be worth a call to check, though. Bottom line: If you are interested in lodging in the area, (1) For SLAS members Kevin Poe was working on a block of reserved rooms at either Ruby's or the Hotel; (2) Try Foster's, The Pines, or one of the smaller motels in Panguitch, Tropic, Cannonville (also a KOA there), etc.; (3) Camp. Campsites here are, of course, first-come, first-served, except for the group site. I don't yet know, but I'm guessing that Kevin will have this reserved for SLAS again. There are also some improved Forest Service campsites in the area.
Disclaimer: To be clear, as a Park employee I am NOT endorsing any of the places I mentioned - they are just possibilities.
Sorry, my house will be full. :-(
Kim
-----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Gary Logan Sent: Saturday, February 25, 2012 8:27 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Eclipse ad
Looking at Google Maps, it appears that the Kannaraville cemetery will be an excellent viewing spot. It may not have very many porta-potties though.
On Feb 22, 2012, at 7:09 AM, Chuck Hards wrote:
"One of the few locations in the world" Chuckle.
KSL ran a story yesterday that included the mayor of Kannaraville, who stated he expected "busloads" of people from southern Cal and Salt Lake City. They even showed the field where they are going to herd everyone. He is even now contracting for enough porta-potties for five-thousand people on that field.
I'm thinking that the general public might get the idea that this happens every year, due to the word "annular". LOL!
On Wed, Feb 22, 2012 at 2:05 AM, Patrick Wiggins <paw@wirelessbeehive.com>wrote:
Looks like the commercial advertising for the eclipse in Utah has started. This showed up in my snail mailbox yesterday:
_______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
Send messages to the list to Utah-Astronomy@mailman.xmission.com
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My neighbor is trying to refurbish a 13" Coulter Dob, and is asking me for advice, hence me turning to the group here. Have any of you had experience upgrading this scope, e.g., secondary, mirror cell, focuser? Any input is welcome... /R
Rich, Coulter scopes work very well as manufactured, but, that said, upgrades make certain tasks easier. It would help to know what the owner's primary concerns are, concerning the functionality of the scope. Imagery can only be affected to a very minor amount, assuming the mirror coatings are still in decent shape and it's collimated.
From my expereince, the mount itself would be the fist thing addressed. I'd replace the cheap molded plastic furniture bearings with real Teflon, then my second upgrade would be a decent focuser. Third would be a real secondary spider. Depending on the vintage, a primary cell upgrade would be last.
What finder is your neighbor using? That is a concern, as well. On Mon, Feb 27, 2012 at 4:30 PM, Richard Tenney <retenney@yahoo.com> wrote:
My neighbor is trying to refurbish a 13" Coulter Dob, and is asking me for advice, hence me turning to the group here. Have any of you had experience upgrading this scope, e.g., secondary, mirror cell, focuser? Any input is welcome...
Hi, That is the size and mirror I used in my Dob I build. The only thing I used from the coulter was the mirror. Everything else was replaced. let me know if you have any questions. Mark Mark Shelton Indian Hill Middle School Tech Ed. Teacher Salt Lake Astronomical Society Board Member (School and Special Star Parties Coordinator) ________________________________ From: Chuck Hards <chuck.hards@gmail.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Monday, February 27, 2012 5:49 PM Subject: Re: [Utah-astronomy] Coulter question Rich, Coulter scopes work very well as manufactured, but, that said, upgrades make certain tasks easier. It would help to know what the owner's primary concerns are, concerning the functionality of the scope. Imagery can only be affected to a very minor amount, assuming the mirror coatings are still in decent shape and it's collimated.
From my expereince, the mount itself would be the fist thing addressed. I'd replace the cheap molded plastic furniture bearings with real Teflon, then my second upgrade would be a decent focuser. Third would be a real secondary spider. Depending on the vintage, a primary cell upgrade would be last.
What finder is your neighbor using? That is a concern, as well. On Mon, Feb 27, 2012 at 4:30 PM, Richard Tenney <retenney@yahoo.com> wrote:
My neighbor is trying to refurbish a 13" Coulter Dob, and is asking me for advice, hence me turning to the group here. Have any of you had experience upgrading this scope, e.g., secondary, mirror cell, focuser? Any input is welcome...
_______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Send messages to the list to Utah-Astronomy@mailman.xmission.com The Utah-Astronomy mailing list is not affiliated with any astronomy club. To unsubscribe go to: http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Then enter your email address in the space provided and click on "Unsubscribe or edit options".
That would be my suggestion, save the optics and build a new rocker box and tube assembly.
Coulter used good optics, tube assemblies left much to be desired. Hi,
That is the size and mirror I used in my Dob I build. The only thing I used from the coulter was the mirror. Everything else was replaced. let me know if you have any questions.
Mark Mark Shelton Indian Hill Middle School Tech Ed. Teacher Salt Lake Astronomical Society Board Member (School and Special Star Parties Coordinator)
________________________________ From: Chuck Hards <chuck.hards@gmail.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Monday, February 27, 2012 5:49 PM Subject: Re: [Utah-astronomy] Coulter question
Rich, Coulter scopes work very well as manufactured, but, that said, upgrades make certain tasks easier. It would help to know what the owner's primary concerns are, concerning the functionality of the scope. Imagery can only be affected to a very minor amount, assuming the mirror coatings are still in decent shape and it's collimated.
From my expereince, the mount itself would be the fist thing addressed. I'd replace the cheap molded plastic furniture bearings with real Teflon, then my second upgrade would be a decent focuser. Third would be a real secondary spider. Depending on the vintage, a primary cell upgrade would be last.
What finder is your neighbor using? That is a concern, as well.
On Mon, Feb 27, 2012 at 4:30 PM, Richard Tenney <retenney@yahoo.com> wrote:
My neighbor is trying to refurbish a 13" Coulter Dob, and is asking me for advice, hence me turning to the group here. Have any of you had experience upgrading this scope, e.g., secondary, mirror cell, focuser? Any input is welcome...
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Rich's original question was one of refurbishment, not overall re-design. Thus my question of available budget. Only the owner can answer that question. An original Coulter Odyssey can be significantly improved without wholesale re-design. If we knew the budget available, concrete suggestions would be more valuable than simply "Throw the whole thing out except for the optics, and start over". Based on Rich's original post, upgraded optical supports and a focuser upgrade seem like the first things to do- it's what he asked about, after all. Come on, people. Re-engineering the mount is secondary. Starting-over from scratch is a distant third. C.
Well, All that is needed is a sheet of plywood, sono tube, screws, epoxy and paint. Probably less than $50.
Rich's original question was one of refurbishment, not overall re-design.
Thus my question of available budget. Only the owner can answer that question.
An original Coulter Odyssey can be significantly improved without wholesale re-design. If we knew the budget available, concrete suggestions would be more valuable than simply "Throw the whole thing out except for the optics, and start over".
Based on Rich's original post, upgraded optical supports and a focuser upgrade seem like the first things to do- it's what he asked about, after all. Come on, people. Re-engineering the mount is secondary.
Starting-over from scratch is a distant third.
C. _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
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BTW, I do have probably enough scrap 3/4" plywood to a least make a rocker box and perhaps a bearing box. Free for the asking. It's exterior grade so would need wood putty.
Erik Well, All that is needed is a sheet of plywood, sono tube, screws, epoxy
and paint. Probably less than $50.
Rich's original question was one of refurbishment, not overall re-design.
Thus my question of available budget. Only the owner can answer that question.
An original Coulter Odyssey can be significantly improved without wholesale re-design. If we knew the budget available, concrete suggestions would be more valuable than simply "Throw the whole thing out except for the optics, and start over".
Based on Rich's original post, upgraded optical supports and a focuser upgrade seem like the first things to do- it's what he asked about, after all. Come on, people. Re-engineering the mount is secondary.
Starting-over from scratch is a distant third.
C. _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
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The issue with the Coulter that I worked on is that it could not be collimated. The push pull system was stripped and wouldn't work. That is why I redesigned the mirror cell. Getting rid of all the weight at the back of the tube caused it to be out of balance. If you move the bearings, the tube will hit the bottom board supports so you either need to re-build the mount or add a lot of weight to the tube. His focuser was really sloppy so the focuser needed replacement. That would have required some tube to be removed from the bottom even if you kept the original mirror cell. I think we spend less than $50 on the whole thing since we only used a half sheet of plywood and used all the Teflon, etc from the original mount. BTW, several of the telescopes that I have built use the same mirror cell so I did already know what I wanted there. In my experience, the secondary doesn't need to be moved much for collimation so once we got that centered it was ok and we didn't mess with it. Thanks, David Dunn Software Engineer Sr. SUPERVALU | Salt Lake Hardware Building 155 N. 400 W. 3rd Floor Salt Lake City, Utah 84103 Cell: 801.750.3198 | Home: 801.544.7705 | Office: 801.961.3253 david.dunn@supervalu.com -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Chuck Hards Sent: Tuesday, February 28, 2012 9:05 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Coulter question Rich's original question was one of refurbishment, not overall re-design. Thus my question of available budget. Only the owner can answer that question. An original Coulter Odyssey can be significantly improved without wholesale re-design. If we knew the budget available, concrete suggestions would be more valuable than simply "Throw the whole thing out except for the optics, and start over". Based on Rich's original post, upgraded optical supports and a focuser upgrade seem like the first things to do- it's what he asked about, after all. Come on, people. Re-engineering the mount is secondary. Starting-over from scratch is a distant third. C. _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Send messages to the list to Utah-Astronomy@mailman.xmission.com The Utah-Astronomy mailing list is not affiliated with any astronomy club. To unsubscribe go to: http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Then enter your email address in the space provided and click on "Unsubscribe or edit options".
Thanks for the input folks! What is the general feeling about University Optics' mirror cell for the 13.1" Coulter Mirror? Enough Support for a mirror that size (is it 1" thick? I don't remember). If the consensus is it's not sufficiently good support for a mirror that diameter, can you David (or someone with lots of ATM experience) suggest a design that a simpleton like me (or my neighbor) put together without too much trouble? Thanks again! /Rich --- On Wed, 2/29/12, Dunn, David <David.Dunn@supervalu.com> wrote:
From: Dunn, David <David.Dunn@supervalu.com> Subject: Re: [Utah-astronomy] Coulter question To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Date: Wednesday, February 29, 2012, 9:58 AM The issue with the Coulter that I worked on is that it could not be collimated. The push pull system was stripped and wouldn't work. That is why I redesigned the mirror cell. Getting rid of all the weight at the back of the tube caused it to be out of balance. If you move the bearings, the tube will hit the bottom board supports so you either need to re-build the mount or add a lot of weight to the tube. His focuser was really sloppy so the focuser needed replacement. That would have required some tube to be removed from the bottom even if you kept the original mirror cell. I think we spend less than $50 on the whole thing since we only used a half sheet of plywood and used all the Teflon, etc from the original mount.
BTW, several of the telescopes that I have built use the same mirror cell so I did already know what I wanted there. In my experience, the secondary doesn't need to be moved much for collimation so once we got that centered it was ok and we didn't mess with it.
Thanks, David Dunn Software Engineer Sr.
SUPERVALU | Salt Lake Hardware Building 155 N. 400 W. 3rd Floor Salt Lake City, Utah 84103 Cell: 801.750.3198 | Home: 801.544.7705 | Office: 801.961.3253 david.dunn@supervalu.com
-----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Chuck Hards Sent: Tuesday, February 28, 2012 9:05 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Coulter question
Rich's original question was one of refurbishment, not overall re-design. Thus my question of available budget. Only the owner can answer that question.
An original Coulter Odyssey can be significantly improved without wholesale re-design. If we knew the budget available, concrete suggestions would be more valuable than simply "Throw the whole thing out except for the optics, and start over".
Based on Rich's original post, upgraded optical supports and a focuser upgrade seem like the first things to do- it's what he asked about, after all. Come on, people. Re-engineering the mount is secondary.
Starting-over from scratch is a distant third.
C. _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
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Rich, if you decide to replace the mirror cell, the following site is a good resource for cells that are designed using the PLOP program: http://www.atmsite.org/contrib/Holm/Plop_optimized_cells/ On the right side of the page, click the "6-point cells" for a design that is good for your mirror. The 6-point cell would not be difficult to make and would give your mirror great support. Mat -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Richard Tenney Sent: Wednesday, February 29, 2012 2:59 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Coulter question Thanks for the input folks! What is the general feeling about University Optics' mirror cell for the 13.1" Coulter Mirror? Enough Support for a mirror that size (is it 1" thick? I don't remember). If the consensus is it's not sufficiently good support for a mirror that diameter, can you David (or someone with lots of ATM experience) suggest a design that a simpleton like me (or my neighbor) put together without too much trouble? Thanks again! /Rich --- On Wed, 2/29/12, Dunn, David <David.Dunn@supervalu.com> wrote:
From: Dunn, David <David.Dunn@supervalu.com> Subject: Re: [Utah-astronomy] Coulter question To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Date: Wednesday, February 29, 2012, 9:58 AM The issue with the Coulter that I worked on is that it could not be collimated. The push pull system was stripped and wouldn't work. That is why I redesigned the mirror cell. Getting rid of all the weight at the back of the tube caused it to be out of balance. If you move the bearings, the tube will hit the bottom board supports so you either need to re-build the mount or add a lot of weight to the tube. His focuser was really sloppy so the focuser needed replacement. That would have required some tube to be removed from the bottom even if you kept the original mirror cell. I think we spend less than $50 on the whole thing since we only used a half sheet of plywood and used all the Teflon, etc from the original mount.
BTW, several of the telescopes that I have built use the same mirror cell so I did already know what I wanted there. In my experience, the secondary doesn't need to be moved much for collimation so once we got that centered it was ok and we didn't mess with it.
Thanks, David Dunn Software Engineer Sr.
SUPERVALU | Salt Lake Hardware Building 155 N. 400 W. 3rd Floor Salt Lake City, Utah 84103 Cell: 801.750.3198 | Home: 801.544.7705 | Office: 801.961.3253 david.dunn@supervalu.com
-----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Chuck Hards Sent: Tuesday, February 28, 2012 9:05 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Coulter question
Rich's original question was one of refurbishment, not overall re-design. Thus my question of available budget. Only the owner can answer that question.
An original Coulter Odyssey can be significantly improved without wholesale re-design. If we knew the budget available, concrete suggestions would be more valuable than simply "Throw the whole thing out except for the optics, and start over".
Based on Rich's original post, upgraded optical supports and a focuser upgrade seem like the first things to do- it's what he asked about, after all. Come on, people. Re-engineering the mount is secondary.
Starting-over from scratch is a distant third.
C. _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
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Thanks for the input folks! What is the general feeling about University Optics' mirror cell for the 13.1" Coulter Mirror? Enough Support for a mirror that size (is it 1" thick? I don't remember). When I made my 13" dob with coulter mirror, I did purchase a University Optics mirror cell, I had to do a bit of drilling to get the mirror to clamp nice in the cell, other than that I am pleased. Holds well and would do it again if I had another 13" Mark Shelton Indian Hill Middle School Tech Ed. Teacher Salt Lake Astronomical Society Board Member (School and Special Star Parties Coordinator) ________________________________
+1 on PLOP. Good tool. On Feb 29, 2012 5:15 PM, "Hutchings, Mat (H USA)" <mat.hutchings@siemens.com> wrote:
Rich, if you decide to replace the mirror cell, the following site is a good resource for cells that are designed using the PLOP program: http://www.atmsite.org/contrib/Holm/Plop_optimized_cells/ On the right side of the page, click the "6-point cells" for a design that is good for your mirror. The 6-point cell would not be difficult to make and would give your mirror great support.
Mat
-----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto: utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Richard Tenney Sent: Wednesday, February 29, 2012 2:59 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Coulter question
Thanks for the input folks! What is the general feeling about University Optics' mirror cell for the 13.1" Coulter Mirror? Enough Support for a mirror that size (is it 1" thick? I don't remember).
If the consensus is it's not sufficiently good support for a mirror that diameter, can you David (or someone with lots of ATM experience) suggest a design that a simpleton like me (or my neighbor) put together without too much trouble?
Thanks again! /Rich
--- On Wed, 2/29/12, Dunn, David <David.Dunn@supervalu.com> wrote:
From: Dunn, David <David.Dunn@supervalu.com> Subject: Re: [Utah-astronomy] Coulter question To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Date: Wednesday, February 29, 2012, 9:58 AM The issue with the Coulter that I worked on is that it could not be collimated. The push pull system was stripped and wouldn't work. That is why I redesigned the mirror cell. Getting rid of all the weight at the back of the tube caused it to be out of balance. If you move the bearings, the tube will hit the bottom board supports so you either need to re-build the mount or add a lot of weight to the tube. His focuser was really sloppy so the focuser needed replacement. That would have required some tube to be removed from the bottom even if you kept the original mirror cell. I think we spend less than $50 on the whole thing since we only used a half sheet of plywood and used all the Teflon, etc from the original mount.
BTW, several of the telescopes that I have built use the same mirror cell so I did already know what I wanted there. In my experience, the secondary doesn't need to be moved much for collimation so once we got that centered it was ok and we didn't mess with it.
Thanks, David Dunn Software Engineer Sr.
SUPERVALU | Salt Lake Hardware Building 155 N. 400 W. 3rd Floor Salt Lake City, Utah 84103 Cell: 801.750.3198 | Home: 801.544.7705 | Office: 801.961.3253 david.dunn@supervalu.com
-----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Chuck Hards Sent: Tuesday, February 28, 2012 9:05 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Coulter question
Rich's original question was one of refurbishment, not overall re-design. Thus my question of available budget. Only the owner can answer that question.
An original Coulter Odyssey can be significantly improved without wholesale re-design. If we knew the budget available, concrete suggestions would be more valuable than simply "Throw the whole thing out except for the optics, and start over".
Based on Rich's original post, upgraded optical supports and a focuser upgrade seem like the first things to do- it's what he asked about, after all. Come on, people. Re-engineering the mount is secondary.
Starting-over from scratch is a distant third.
C. _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
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He decided to go with a Crawford Machine Shop crayford ( http://crawmach.com/TelescopeAcce.aspx ) and U.O. mirror cell. I think you recommended that same focuser to me once, didn't you Chuck? Anyone else have experience with this one? It looks like a nice, US-made focuser. After I look at his I may buy the same for my 10" project. Thanks again for your suggestions! /R --- On Wed, 2/29/12, Chuck Hards <chuck.hards@gmail.com> wrote:
From: Chuck Hards <chuck.hards@gmail.com> Subject: Re: [Utah-astronomy] Coulter question To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Date: Wednesday, February 29, 2012, 8:25 PM +1 on PLOP. Good tool. On Feb 29, 2012 5:15 PM, "Hutchings, Mat (H USA)" <mat.hutchings@siemens.com> wrote:
Rich, if you decide to replace the mirror cell, the following site is a good resource for cells that are designed using the PLOP program: http://www.atmsite.org/contrib/Holm/Plop_optimized_cells/ On the right side of the page, click the "6-point cells" for a design that is good for your mirror. The 6-point cell would not be difficult to make and would give your mirror great support.
Mat
-----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto: utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Richard Tenney Sent: Wednesday, February 29, 2012 2:59 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Coulter question
Thanks for the input folks! What is the general feeling about University Optics' mirror cell for the 13.1" Coulter Mirror? Enough Support for a mirror that size (is it 1" thick? I don't remember).
If the consensus is it's not sufficiently good support for a mirror that diameter, can you David (or someone with lots of ATM experience) suggest a design that a simpleton like me (or my neighbor) put together without too much trouble?
Thanks again! /Rich
--- On Wed, 2/29/12, Dunn, David <David.Dunn@supervalu.com> wrote:
From: Dunn, David <David.Dunn@supervalu.com> Subject: Re: [Utah-astronomy] Coulter question To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Date: Wednesday, February 29, 2012, 9:58 AM The issue with the Coulter that I worked on is that it could not be collimated. The push pull system was stripped and wouldn't work. That is why I redesigned the mirror cell. Getting rid of all the weight at the back of the tube caused it to be out of balance. If you move the bearings, the tube will hit the bottom board supports so you either need to re-build the mount or add a lot of weight to the tube. His focuser was really sloppy so the focuser needed replacement. That would have required some tube to be removed from the bottom even if you kept the original mirror cell. I think we spend less than $50 on the whole thing since we only used a half sheet of plywood and used all the Teflon, etc from the original mount.
BTW, several of the telescopes that I have built use the same mirror cell so I did already know what I wanted there. In my experience, the secondary doesn't need to be moved much for collimation so once we got that centered it was ok and we didn't mess with it.
Thanks, David Dunn Software Engineer Sr.
SUPERVALU | Salt Lake Hardware Building 155 N. 400 W. 3rd Floor Salt Lake City, Utah 84103 Cell: 801.750.3198 | Home: 801.544.7705 | Office: 801.961.3253 david.dunn@supervalu.com
-----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Chuck Hards Sent: Tuesday, February 28, 2012 9:05 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Coulter question
Rich's original question was one of refurbishment, not overall re-design. Thus my question of available budget. Only the owner can answer that question.
An original Coulter Odyssey can be significantly improved without wholesale re-design. If we knew the budget available, concrete suggestions would be more valuable than simply "Throw the whole thing out except for the optics, and start over".
Based on Rich's original post, upgraded optical supports and a focuser upgrade seem like the first things to do- it's what he asked about, after all. Come on, people. Re-engineering the mount is secondary.
Starting-over from scratch is a distant third.
C. _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy
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It's really difficult to adjust the secondary and primary mirrors to achieve collimation (and it was pretty off, testing with my laser). In fact, the primary mirror "cell" is so crude it was impossible to adjust it as far as it needed to be tweaked. /R --- On Mon, 2/27/12, Chuck Hards <chuck.hards@gmail.com> wrote:
From: Chuck Hards <chuck.hards@gmail.com> Subject: Re: [Utah-astronomy] Coulter question To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Date: Monday, February 27, 2012, 5:49 PM Rich, Coulter scopes work very well as manufactured, but, that said, upgrades make certain tasks easier. It would help to know what the owner's primary concerns are, concerning the functionality of the scope. Imagery can only be affected to a very minor amount, assuming the mirror coatings are still in decent shape and it's collimated.
From my expereince, the mount itself would be the fist thing addressed. I'd replace the cheap molded plastic furniture bearings with real Teflon, then my second upgrade would be a decent focuser. Third would be a real secondary spider. Depending on the vintage, a primary cell upgrade would be last.
What finder is your neighbor using? That is a concern, as well.
On Mon, Feb 27, 2012 at 4:30 PM, Richard Tenney <retenney@yahoo.com> wrote:
My neighbor is trying to refurbish a 13" Coulter Dob, and is asking me for advice, hence me turning to the group here. Have any of you had experience upgrading this scope, e.g., secondary, mirror cell, focuser? Any input is welcome...
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In that case it's probably a late model. If he has the budget, go for new optical supports and a focuser all at once. I can supply some Teflon for new bearings at no charge, although the plastic trunions might be sticky too. On Mon, Feb 27, 2012 at 10:21 PM, Richard Tenney <retenney@yahoo.com> wrote:
It's really difficult to adjust the secondary and primary mirrors to achieve collimation (and it was pretty off, testing with my laser). In fact, the primary mirror "cell" is so crude it was impossible to adjust it as far as it needed to be tweaked.
I helped a guy in Ogden fix one of the red tube Coulters. I built a mirror cell by cutting out a square piece of 3/4" plywood that would fit inside the tub. I used carriage bolts L brackets, springs, washers and wingnuts to mount the new mirror cell. We also replaced the focuser with the orion 1.25" focuser. We moved the altitude bearings and rebuilt the mount out of 3/4" plywood so that it would be lighter. This also allowed us to have a little more height to get the balance correct after losing all the weight at the rear. I could go over and get some picture if someone wants them. Thanks, David Dunn Software Engineer Sr. SUPERVALU | Salt Lake Hardware Building 155 N. 400 W. 3rd Floor Salt Lake City, Utah 84103 Cell: 801.750.3198 | Home: 801.544.7705 | Office: 801.961.3253 david.dunn@supervalu.com -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Chuck Hards Sent: Tuesday, February 28, 2012 6:11 AM To: Utah Astronomy Subject: Re: [Utah-astronomy] Coulter question In that case it's probably a late model. If he has the budget, go for new optical supports and a focuser all at once. I can supply some Teflon for new bearings at no charge, although the plastic trunions might be sticky too. On Mon, Feb 27, 2012 at 10:21 PM, Richard Tenney <retenney@yahoo.com> wrote:
It's really difficult to adjust the secondary and primary mirrors to achieve collimation (and it was pretty off, testing with my laser). In fact, the primary mirror "cell" is so crude it was impossible to adjust it as far as it needed to be tweaked.
_______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Send messages to the list to Utah-Astronomy@mailman.xmission.com The Utah-Astronomy mailing list is not affiliated with any astronomy club. To unsubscribe go to: http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Then enter your email address in the space provided and click on "Unsubscribe or edit options".
I never dismiss even the remotest possibility. :-o Kim -----Original Message----- From: utah-astronomy-bounces+kimharch=cut.net@mailman.xmission.com [mailto:utah-astronomy-bounces+kimharch=cut.net@mailman.xmission.com] On Behalf Of Chuck Hards Sent: Tuesday, February 28, 2012 9:24 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Eclipse ad Does that mean that the Swedish Bikini Team will actually be there? Just sayin'.... ;-) C.
There is always hope.
Does that mean that the Swedish Bikini Team will actually be there?
Just sayin'.... ;-)
C.
On Mon, Feb 27, 2012 at 4:21 PM, Kim <kimharch@cut.net> wrote:
I guess my wife will be out of town that week after all.
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participants (10)
-
Chrismo -
Chuck Hards -
Dunn, David -
erikhansen＠thebluezone.net -
Gary Logan -
Hutchings, Mat (H USA) -
Kim -
Mark Shelton -
Patrick Wiggins -
Richard Tenney