New member starting pst mod

Frankenscope? Let's see it!***be advised that NOTHING in this forum has been safety tested and you are reading and using these posts at your own peril. blah, blah, blah... dont mess around with your eyesight when it comes to solar astronomy. Use appropriate filtration at all times...
dgcclubmaker
Oh, I get it now!
Oh, I get it now!
Posts: 36
Joined: Sat Dec 21, 2013 6:03 pm

New member starting pst mod

Post by dgcclubmaker » Sat Dec 21, 2013 9:01 pm

Hi All!
My name is Ricky and have been following these pst related mod threads for a bit. Ive decided to attempt it myself! So far, ive procured a brand new Celestron Omni 102 xlt ota. Thats it! lol Ill probably pu a new pst since they are currently on sale. Ive decided to go with a Lunt 100mm erf. I think ill also just start by using the included bf5 as some of the solar images look awesome using it. I saw an earlier thread in regards to mounting the erf...im thinking about p/u a white light solar filter and mounting my erf into it; it seems like a relatively inexpensive way of doing it. Im still looking at the optical train between the focuser and ep/ccd. I hope to keep y'all updated as to my progress. And by all means let me know of some of the tricks of the trade that may help me!

Best Regards,
Ricky

User avatar
Merlin66
Librarian
Librarian
Posts: 3170
Joined: Tue Dec 13, 2011 1:23 pm
Location: St Leonards, Australia
Contact:

Re: New member starting pst mod

Post by Merlin66 » Sat Dec 21, 2013 10:32 pm

Ricky,
Welcome to the best solar forum on the web!
I have a pdf document on PST mods available. Just drop me an email for a copy.
kenm(dot)Harrison(at)gmail(dot)com
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer

User avatar
marktownley
Librarian
Librarian
Posts: 24543
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Re: New member starting pst mod

Post by marktownley » Sat Dec 21, 2013 11:29 pm

Welcome! Lots of people here to help ypu with that mod :)
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

User avatar
swisswalter
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 17951
Joined: Thu Feb 06, 2014 4:28 am
Location: Switzerland
Contact:

Re: New member starting pst mod

Post by swisswalter » Sun Dec 22, 2013 9:44 am

Hi Richy

welcome to that wonderful site. Have sun, fun and mod ;-)
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE :)

from 7 am - 7 pm http://www.nanosys.ch

from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa ;)

dgcclubmaker
Oh, I get it now!
Oh, I get it now!
Posts: 36
Joined: Sat Dec 21, 2013 6:03 pm

Re: New member starting pst mod

Post by dgcclubmaker » Fri Dec 27, 2013 3:27 pm

I hope everyone had a nice holiday period! Now back to the work at hand...I picked a used pst and am having a dickens of a time trying to get the etalon off as well as the blocking filter. I knew going in that some of the older psts had locktite added to the threads. Ive been using a strap wrench but to no avail. Is there another method or is brute force the only option?

Best Regards,
Ricky

User avatar
marktownley
Librarian
Librarian
Posts: 24543
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Re: New member starting pst mod

Post by marktownley » Fri Dec 27, 2013 3:32 pm

Generally brute force is pretty much the only way. Can you hold the body of the PST in a bench vice while you twist with the boa?
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

dgcclubmaker
Oh, I get it now!
Oh, I get it now!
Posts: 36
Joined: Sat Dec 21, 2013 6:03 pm

Re: New member starting pst mod

Post by dgcclubmaker » Fri Dec 27, 2013 3:36 pm

I have a small vise...ill give it a go. Thanks.

User avatar
marktownley
Librarian
Librarian
Posts: 24543
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Re: New member starting pst mod

Post by marktownley » Fri Dec 27, 2013 3:39 pm

wrap the body in some cloth so as not to mark it...
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

User avatar
swisswalter
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 17951
Joined: Thu Feb 06, 2014 4:28 am
Location: Switzerland
Contact:

Re: New member starting pst mod

Post by swisswalter » Fri Dec 27, 2013 5:37 pm

Hi Ricky

I used the super trooper hair dryer from the lab to soften the loctite
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE :)

from 7 am - 7 pm http://www.nanosys.ch

from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa ;)

Allcart
Im an EXPERT!
Im an EXPERT!
Posts: 496
Joined: Wed Jan 09, 2013 1:59 pm

Re: New member starting pst mod

Post by Allcart » Fri Dec 27, 2013 6:04 pm

Also try wrapping some masking tape round the part where the strap wrench grips. It provides more grip for the rubber strap.
Allan

dgcclubmaker
Oh, I get it now!
Oh, I get it now!
Posts: 36
Joined: Sat Dec 21, 2013 6:03 pm

Re: New member starting pst mod

Post by dgcclubmaker » Fri Dec 27, 2013 11:30 pm

Lets try this again...the blocking filter and erf modules are free. I just broke my strap wrench trying to free up the etalon assembly from the black box...lol My goodness its on tight! Will adding heat (<200 F) to the etalon assembly damage the etalon?

User avatar
Merlin66
Librarian
Librarian
Posts: 3170
Joined: Tue Dec 13, 2011 1:23 pm
Location: St Leonards, Australia
Contact:

Re: New member starting pst mod

Post by Merlin66 » Sat Dec 28, 2013 12:03 am

I assume by removing the eyepiece/ blocking filter assembly you're going for a Stage 2 mod.
What do you have in mind for the final focuser?
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer

dgcclubmaker
Oh, I get it now!
Oh, I get it now!
Posts: 36
Joined: Sat Dec 21, 2013 6:03 pm

Re: New member starting pst mod

Post by dgcclubmaker » Sat Dec 28, 2013 12:09 am

Hi Ken,
Larry Alvarez gave me a very nice drawing of the pst stage 2 mod. According to those plans I can use the stock focuser on the donor scope.

User avatar
marktownley
Librarian
Librarian
Posts: 24543
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Re: New member starting pst mod

Post by marktownley » Sat Dec 28, 2013 10:50 am

Is it all disassembled now as you need then?
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

dgcclubmaker
Oh, I get it now!
Oh, I get it now!
Posts: 36
Joined: Sat Dec 21, 2013 6:03 pm

Re: New member starting pst mod

Post by dgcclubmaker » Sat Dec 28, 2013 4:33 pm

So far ive only released the rear assembly. Im still working on getting the etalon assembly off the black box...

User avatar
marktownley
Librarian
Librarian
Posts: 24543
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Re: New member starting pst mod

Post by marktownley » Sat Dec 28, 2013 4:42 pm

Have you taken off the rubber tuning ring?
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

dgcclubmaker
Oh, I get it now!
Oh, I get it now!
Posts: 36
Joined: Sat Dec 21, 2013 6:03 pm

Re: New member starting pst mod

Post by dgcclubmaker » Sat Dec 28, 2013 4:46 pm

I have removed rubber tuning ring. Id like to apply approx. 200F heat via a heat gun to the etalon assembly to try to break the Loctite seal but I don't know if the etalon itself will be damaged...

User avatar
solarchat
Site Admin
Site Admin
Posts: 3952
Joined: Sat Feb 01, 2014 3:10 pm
Location: Atlanta, GA USA
Contact:

Re: New member starting pst mod

Post by solarchat » Sat Dec 28, 2013 4:56 pm

just a note.. while you are not breaking any rules here as we don't have many...but I would strongly suggest that perhaps you don't destroy your solar scope unless you know what you are doing. This forum is designed to promote solar astronomy outreach and I am glad to have the mod forum here because some people are obsessed with this stuff, but I, as the owner of this forum, do NOT under any circumstances recommend forcibly disassembling a perfectly good, or damaged for that matter, solar telescope for any reason.
Stephen W. Ramsden
Atlanta, GA USA
Founder/Director Charlie Bates Solar Astronomy Project
http://www.solarastronomy.org

dgcclubmaker
Oh, I get it now!
Oh, I get it now!
Posts: 36
Joined: Sat Dec 21, 2013 6:03 pm

Re: New member starting pst mod

Post by dgcclubmaker » Sat Dec 28, 2013 5:00 pm

Hi Steve,
I fully understand where you are coming from.

Best Regards,
Ricky

User avatar
marktownley
Librarian
Librarian
Posts: 24543
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Re: New member starting pst mod

Post by marktownley » Sat Dec 28, 2013 5:16 pm

I have removed rubber tuning ring. Id like to apply approx. 200F heat via a heat gun to the etalon assembly to try to break the Loctite seal but I don't know if the etalon itself will be damaged...

Have you also taken off the metal collar that it goes onto? This has a single retaining screw.
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

dgcclubmaker
Oh, I get it now!
Oh, I get it now!
Posts: 36
Joined: Sat Dec 21, 2013 6:03 pm

Re: New member starting pst mod

Post by dgcclubmaker » Sat Dec 28, 2013 5:21 pm

I have removed the metal collar as well...it slipped right off. I think ill try brute force again with a different strap wrench as I really don't want to expose the etalon to heat. My donor ota will arrive next week. Im still in search of a 100mm erf. I also need to order the rest of the parts needed for the final after focuser assembly.

User avatar
marktownley
Librarian
Librarian
Posts: 24543
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Re: New member starting pst mod

Post by marktownley » Sat Dec 28, 2013 5:57 pm

Yup, I think I would go for the brute force approach rather than heat, especially so close to the exposed etalon. Or, as a radical idea, if you are not using the black box anymore take off the side panel and apply the heat to the threads from the inside of the box...
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

User avatar
swisswalter
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 17951
Joined: Thu Feb 06, 2014 4:28 am
Location: Switzerland
Contact:

Re: New member starting pst mod

Post by swisswalter » Sat Dec 28, 2013 7:10 pm

Hi Ricky

you can always release the etalon from the housing, then use the heat and reasssemble it again later
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE :)

from 7 am - 7 pm http://www.nanosys.ch

from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa ;)

dgcclubmaker
Oh, I get it now!
Oh, I get it now!
Posts: 36
Joined: Sat Dec 21, 2013 6:03 pm

Re: New member starting pst mod

Post by dgcclubmaker » Sun Dec 29, 2013 4:29 pm

Thanks for all of the suggestions...im going to try brute force one more time then consider removing the etalon before applying heat. I have just contacted Lunt to order up the 100mm erf.

User avatar
marktownley
Librarian
Librarian
Posts: 24543
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Re: New member starting pst mod

Post by marktownley » Sun Dec 29, 2013 4:40 pm

Make sure you clamp the body in a vice when you use brute force...
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

Post Reply

Who is online

Users browsing this forum: Google [Bot] and 7 guests