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Equipment Discussions >> Reflectors

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Slartibartfast
sage


Reged: 05/28/08

Loc: New Jersey
Re: The Evolution of a Lightbridge 16. new [Re: Project Galileo]
      #4951188 - 12/05/11 10:58 AM

Doc,

Thanks for taking the time to give me your impressions.

Quote:

I didn't want to wreck the stock boards or mess up my friction/stiction/motion balance. Ultimately I knew that if I blew it I could build a whole new base from plywood.




I think I am leaning toward a complete base rebuild and I'll install Ebony Star and PTFE pads then. Maybe in the spring I'll have time, but for now, I think I am going to do nothing and wait.

Quote:

At higher magnifications there was that over shooting of the target you had to do with the rebound after with alt motions. I had gotten used to it and I am sure this is what people mean when they talk about to getting used to a scope.




I do get some rebound. At 366x (5mm eyepiece) it is difficult to keep the object in the FOV but it's rare I'm at that magnification. Most often, I am at 203x (9mm eyepiece) or less and I don't notice the rebound. But, like you said, I'm used to the motions and can work around them for now. I'm not in a hurry, but at some point I'll do a base rebuild.

Don,

Quote:

A really effective modification not previously mentioned is adding buttresses to the side panels of the rocker box.




This is an interesting mod and it sounds fairly easy to do. I may tackle this one if the motions become annoying enough and I don't do the rebuild first...


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Slartibartfast
sage


Reged: 05/28/08

Loc: New Jersey
Re: The Evolution of a Lightbridge 16. new [Re: Project Galileo]
      #4951216 - 12/05/11 11:12 AM

Quote:

Anyone who has ever set up a Lightbridge can attest to this setup dance.




I can attest to this dance. I just did it over the weekend!


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Project Galileo
professor emeritus
*****

Reged: 11/14/07

Loc: Jefferson County, Colorado
Re: The Evolution of a Lightbridge 16. new [Re: Slartibartfast]
      #4952039 - 12/05/11 06:40 PM

I have spent long hours in the forums reading and learning. All the modifications to my LB16 I have learned from other threads. Great minds have thought long and hard to solve this telescope's problems. I thank you all for your insights and examples. My Lightbridge is a wonderful telescope today because of your inputs and ideas.

There are a few telescopes here on Cloudy Nights, specifically Lightbridge telescopes that have stood out. These Lightbridges have been given a name. Fame to these scopes have come with names like Beowulf, Night Rider, Green Goblin and Woodenbridge. These special telescopes stood out because of some unique modification their owners lovingly gave them that differentiated them enough from the common modified Lightbridge telescopes. These differences meant they needed a name.

It is time for my Lightbridge to be made different, to be unique, to stand out among others, and to break free from the bonds of a mundane existence. Currently, somewhere on the planet, specialists are attending to my telescope. Elsewhere people scramble about delivering a flocking material shipment. Meanwhile other people package and ship other accessories.

So, I am waiting and therefore so must you. The upcoming modifications and reveals are profound. Yes, I said profound. However, while we wait I thought I would give you a peek at what is to come.

So, here is a peek. Today my Lightbridge got a name.


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Project Galileo
professor emeritus
*****

Reged: 11/14/07

Loc: Jefferson County, Colorado
Re: The Evolution of a Lightbridge 16. new [Re: Project Galileo]
      #4952071 - 12/05/11 07:00 PM

I was talking to a dear friend the other day about my plans for the telescope. Jen has made iron-on decals and stickers for my wife and I before. After coming up with a name for the telescope I knew she would be just the person to help.

Jen came to the office today with her gear to make a couple decals for the Lightbridge. First she got online and downloaded the font. I wanted to make the sticker look like it was painted and gestural. After a quick scroll just the right one was found. She then created the sticker with her cool software. The machine she uses is a Silhouette and is capable of all kinds of cool things. I would explain this machine as a space age grid plotter cutter thingy. Of course I would say that to just say "space age" so I cannot be trusted. However, this is a really cool cutter.



The vinyl is cut out from a roll. Then it is placed on a cutting board and fed into the cutter machine thingy.



After the machine makes a bunch of R2D2 sounds out comes the cut decal/sticker. Jen gently peeled back the negative vinyl and the sticker is left behind. She then got out this huge wide masking tape kind of stuff and pressed it sticky side down onto the vinyl sticker. This would be the part I would peel off when applying the decal.



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Project Galileo
professor emeritus
*****

Reged: 11/14/07

Loc: Jefferson County, Colorado
Re: The Evolution of a Lightbridge 16. new [Re: Project Galileo]
      #4952085 - 12/05/11 07:16 PM

She then trimmed the sticker down to size. It took her 10 minutes to do it all and didn't charge a thing. All hail Jen, keeper of the light!

I rushed home at lunch to apply them to the Lightbridge. First, I lined up where I wanted the decals to go. I wanted to make it look like a special model decal kind of like automobile badging ala Chevy and Z71 or Ford and SHO.



Then I used a credit card to rub the back of the masking tape transfer paper stuff and decal. After thoroughly pressing it down everywhere I peeled back the paper leaving the vinyl in place. I repeated the same steps for the other side. Just like that my Lightbridge was given a name.



From this day forward this Lightbridge shall be known as "M42".



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Starman1
Vendor (EyepiecesEtc.com)
*****

Reged: 06/24/03

Loc: Los Angeles
Re: The Evolution of a Lightbridge 16. new [Re: Project Galileo]
      #4952201 - 12/05/11 08:27 PM

Just a note: you put your eyepiece tray on upside down.
In the orientation in which you attached it, the heads of the screws can scratch the eyepiece bodies as you insert and remove them.
If you install it the other way, the screw flange is underneath the eyepiece tray and not easily seen, your lowest-power eyepiece is on the left (as it should be), and you will not scratch the eyepiece bodies inserting and removing them.


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Project Galileo
professor emeritus
*****

Reged: 11/14/07

Loc: Jefferson County, Colorado
Re: The Evolution of a Lightbridge 16. new [Re: Starman1]
      #4952209 - 12/05/11 08:31 PM

Good catch. I hadn't noticed. Thanks. I also figured out that I had some of the truss poles reattached backward. It mattered.

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Slartibartfast
sage


Reged: 05/28/08

Loc: New Jersey
Re: The Evolution of a Lightbridge 16. new [Re: Project Galileo]
      #4952542 - 12/06/11 12:29 AM

Very nice!

Are you going to make M42 the first light on your newly refigured mirror when it comes back?


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ThreeD
scholastic sledgehammer


Reged: 12/23/08

Loc: Sacramento suburbs
Re: The Evolution of a Lightbridge 16. new [Re: Project Galileo]
      #4952591 - 12/06/11 01:34 AM

Cutting up an electrical box was a great idea. Not only is it plastic so you won't be clanking your freshly powdercoated ring against them, I imagine that particular plastic is a nice balance of softness and rigidity.

I used couple of fender washers which I drilled so that the nub had a place to go then painted them flat black. It's amazing how much easier it is setup/teardown the scope now. In fact I would consider this a must-do modification.

I do feel sorry for those owners of old lightbridge units however as the entire feature containing the tapped hole and nub isn't present on the brackets...


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Project Galileo
professor emeritus
*****

Reged: 11/14/07

Loc: Jefferson County, Colorado
Re: The Evolution of a Lightbridge 16. new [Re: ThreeD]
      #4954945 - 12/07/11 01:03 PM

Scott, I am so excited to use the new plastic truss pole retaining tabs. They will make set up so much easier. I only get out to my dark site spot once or twice a month so they won't be worn out too fast. Usually the scope stays set up in the garage and is rolled out on the cart. Prolly why I haven't been burning to get that mod done. I should have done it sooner. The mod was slick, easy, and a huge bang for my buck.

Don and everyone who has posted ideas in this thread, thanks for your continued insights by the way. My hope is that some newer astronomer may read this post someday and be inspired by either how I approached this telescope's mods or by other's ideas and suggestions.

Bart, I love the idea of M42 being first light. It will be poetically perfect.

Yesterday the mail man was my friend. He brought me a nicely packaged box from Catseye Collimation Tools. Today's update is mostly just to share my new accessories for this scope. Although not a true modification this collimation set is now integral and a part of M42 in my opinion. After reading and learning about collimation through the years it is now obvious to me that a precision collimation set and therefore precision collimation is essential to this fast f/4.5 telescope. Further, adding the Paracorr to the mix increased my need for accurate collimation tolerances.

Previous to this new set I used a laser collimator. Much is talked about the pros and cons of lasers. I was fortunate to have these forums and others' insights about laser collimators. Learning how to tune and collimate the laser put my mind at ease that it was as good as can be had for a laser. My model is an Orion Lasermate collimator. FYI when I first got it I check its collimation and it was spot on from the factory. Recently, like last week, I put M42's focuser in a vise and pointed it across my shop. Inserting the laser and turning it showed I still had tight (less than 1/4") movement of the laser beam at about 25 feet. I am satisfied it is still as good as can be for a laser.

I also want to say I am in no way part of Catseye. Its just a great product with A+ recommendations and reviews. I ordered the Triple Pack Pro XLSK set. It came in a nice black box. Cut outs of the foam were clean and presentation is top notch for these tools.



The first piece of the set is the Teletube XLS adjustable sight tube. It has small set screws that allow the tube to be adjusted for each telescope's speed. Notice how they included allen wrenches to adjust the set screws. Everything about this collimation set screams perfection and it is made so well. My secondary will be so nicely aligned now.



There is a nice laminated card stock gauge included to set the length of the Teletube to just the right length. The Blackcat XL Cheshire equally is finished wonderfully.



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Project Galileo
professor emeritus
*****

Reged: 11/14/07

Loc: Jefferson County, Colorado
Re: The Evolution of a Lightbridge 16. new [Re: Project Galileo]
      #4954979 - 12/07/11 01:19 PM

The Infinity XLK Auto Collimator with its offset 2 pupil design is just asking to align my optical path. The underside was a machining work of art. Heck, the whole piece and set is a work of art. Also included was a nice red LED pen light attached to a clip. The light clips onto the spider assembly and the beam is focused toward the primary mirror. This light gives a nice red reflex lighting to the center marker and to this passive set so M42 can be collimated at night. The cork will protect the finish of the vanes nicely.



There is a learning curve to this set but I am finding learning about Newtonian collimation principles fun. Included are several instruction sheets and how-to information. Also, a copy of "New Perspectives On Newtonian Collimation" by Vic Menard is included. I am pleased. Lastly attached to an instruction sheet on how to attach them are a couple of center markers. I opted for the yellow "Hot Spot". Rolled up in a tube to protect it during shipping is the template. The centering and marking template is clear plastic and well protected during shipping. The instructions are clear and concise on attaching the center dot. I am so excited to use this set once I get M42 back together.



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Starman1
Vendor (EyepiecesEtc.com)
*****

Reged: 06/24/03

Loc: Los Angeles
Re: The Evolution of a Lightbridge 16. new [Re: Project Galileo]
      #4955051 - 12/07/11 01:52 PM

Now that you have the Catseye tools, I hope this can help:
http://www.cloudynights.com/item.php?item_id=2677


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johnnyha
Postmaster
*****

Reged: 11/12/06

Loc: Sherman Oaks, CA
Re: The Evolution of a Lightbridge 16. new [Re: Starman1]
      #4955612 - 12/07/11 07:27 PM

A tip: Spin the site tube in your focuser and make sure the crosshairs are collimated, you can readily see when you rotate it - the center point where the wires intersect should not move. Mine were a hair off but its extremely easy to recollimate you just nudge the wires with your finger. Great thread following with interest thanks!

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Project Galileo
professor emeritus
*****

Reged: 11/14/07

Loc: Jefferson County, Colorado
Re: The Evolution of a Lightbridge 16. new [Re: johnnyha]
      #4957334 - 12/08/11 07:46 PM

Cross hairs are spot on! Thanks for the tip. Its always nice to know.

Yesterday I got to finish up on my Mauro Da Lio baffle. I found some old plastic for sale signs that I figured I could repurpose. They are like cardboard box material in structure only made of plastic and not paper. I traced the inside of the lower cast piece the tube attaches too. I figured it would give me a perfectly round inside measurement as a guide to cut along. If you notice I did this part some time ago before powder coating.



It worked like a charm. I did get some fierce forearm cramps but made it through. After getting the disc I used the mirror itself as a template for the diameter of the inside cut. I took extra care to make sure the mirror was centered before tracing. I ended up cutting about 1/8" larger than the mirror traced. I wanted to make sure there was enough clear around the edge to allow for minor adjustments in the mirror and to show off the great edges of the mirror. You can also see the silicone glue that held the mirror prisoner in its cell before I liberated it. When I communicated with Optic Wave Laboratories they told me to leave it and they would clean it up.



Viola! The baffle is complete! After a few test fittings and trimming cycles it was completely rounded, fit the walls nicely, and the edge of the baffle didn't hang over the mirror anywhere.



I spray painted the bottom of it flat black while I was painting washers that would go inside of the tube. I used a multipurpose paint and it adhered very nicely to the plastic baffle. I plan to flock the top of the baffle. It will be flocked and installed with epoxy after the inside of the tube is flocked.



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Project Galileo
professor emeritus
*****

Reged: 11/14/07

Loc: Jefferson County, Colorado
Re: The Evolution of a Lightbridge 16. new [Re: Project Galileo]
      #4957400 - 12/08/11 08:26 PM

The mailman finally brought my package from Scopestuff. Flocking time! Apparently it had been on back order. I got three rolls of the 24"x48" flocking material. I plan to flock the upper and lower tubes and also two of my other smaller refractors at the same time. This stuff is wicked dark and is lighter in weight than I thought it would be. It came with a nice, simple to follow, instruction sheet. I am very pleased.



I cut one roll in half to use on the upper tube. Each roll needed the ends trimmed. I also checked for squareness. It was already cut spot on from Scopestuff. Thanks. That made the job just a tad easier.



I figured out how much one roll would cover and how much would be needed to fill the gap. That gave me an idea of where to mark and start the first roll. Once I marked a line where I needed to begin I peeled back about two inches of the backing paper. I held each exposed end tight, aligned it to my line, then gently pressed the flocking into place. I found out that if you gently put the paper in place it could be pulled off and repositioned to get it just right. However, once it was pressed hard into place it was very stuck. After getting the first couple inches pressed well I could take about four inches of the paper off at a time, press and smooth it from the the inside out. No wrinkles, no bubbles, no worries. It went on very well and smooth.



A quick trim around the edge to clean up the overlap with a razor and it was neat and tidy. The lower tube went just as easy. The second piece was measured and cut. The same process of lining up the edge, gently pressing it in place, and adjusting to get it just right worked perfectly. The seams are nearly invisible. It took me an hour to flock both tubes. A small hobby knife helped me cut out each hole for the screws, focuser, et al.



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Project Galileo
professor emeritus
*****

Reged: 11/14/07

Loc: Jefferson County, Colorado
Re: The Evolution of a Lightbridge 16. new [Re: Project Galileo]
      #4957422 - 12/08/11 08:44 PM

The baffle was flocked with scraps and trim. I then measured and marked where the baffle needed to be placed. Studies show it is best placed .2 to .5 times the diameter of the mirror above the surface of the mirror. I settled on a number, made a template guide out of scrap paper, and placed the baffle. From the top the baffle blends in to the side wall flocking. Even with flash it was difficult to image.



Once I was satisfied it was perfectly in place 5 minute epoxy sealed the deal. Literally. It worked as a nice seal all the way around the baffle. There will be no air leaking down the edge here. Very nifty and strong!



Baffle done! Mod complete. It looks great and will work wonderfully. I am very happy with how the flocking went in. It is leaps and bounds darker. I think something about the sound deadening has an effect to make you feel it is darker too. If I hadn't named it "M42" already "Black Hole" comes to mind.



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Project Galileo
professor emeritus
*****

Reged: 11/14/07

Loc: Jefferson County, Colorado
Re: The Evolution of a Lightbridge 16. new [Re: Project Galileo]
      #4957672 - 12/09/11 12:36 AM

Now, lets focus on the tubes. For so long they have just sat empty and alone. There was nothing on them and nothing to do with them until later in the mods. The only functional modification I could do with the tubes was to blacken the rim of the ST-80. So I did.



After a friend of a friend talked with me and a few emails were bounced back and forth I found myself looking at a proof for an idea that was amazing me. The friend of a friend wraps cars. Well, he wraps cars, windows, buildings, and all kinds of things. Mostly people wrap cars for advertising. Often its corporations wrapping fleet vehicles. You may have seen a graphically laden wrapped car, truck, or bus somewhere I am sure.

Here is how M42 got its name.

M42, The Great Orion Nebula, was an obvious choice for me. To wrap a deep space hunter like the Lightbridge 16 in the very stars and nebulas it seeks on clear nights seems like a great idea. Since a wrap can be made of any photo, image, graphic, whatever, many ideas were brain stormed. Cammo, bright obnoxious cammo, Atlas rocket booster, WWII pin up nose art, patriotic themes, and dragons all were ideas that made the short list. However, once I got some ideas back from Jeff, the wrapper, the M42 imagery stood out. Once ideas are hashed out and measurements are taken the graphic artist goes to work and lays out the proof. After approval it is sent to their printer. Its a huge printer but not that different from the common ink jet. The printing is done directly onto a thin polyester/vinyl film made by 3M. Product information can be read about here.



The film is, well, you guessed it, some SPACE AGE stuff. The product description says these 50 micron cast films offer versatility along with slideable, repositionable, pressure activated adhesive. These long term durable and removable films have excellent hiding power and stability, making them perfect for signs and fleet graphics and watercraft, including surfaces with corrugations and rivets. Films with this Comply adhesive have air release channels for fast and easy, bubble-free graphic installations. In addition, the air release channels for films with Comply adhesive are non-visible and have improved air release.

Once this vinyl film is printed it is over laminated with another space age product. 3M Scotchcal Gloss Overlaminate is a 2 mil film that can enhance gloss and provide additional ultraviolet and durable physical protection for electronic digitally imaged graphic constructions. You can read more about its product information here. Then the wrap is attached to the part, positioned, then heat shrunk to the item being wrapped. The glue that is used is heat sensitive and activated with the heat gun. When you want to remove the wrap you just heat it up and the glue releases. It leaves the surface unharmed.



I had them wrap right over the stock stickers so that this modification is completely reversible. The whole complete, protected, stock Lightbridge is underneath. I tried to show how clingy and thin this wrap is. It is shiny like glossy hot rod paint and amazingly durable. This is the same stuff they use on cars so it will hold up to rocks, salt, road grime, and all the harshness of the road. Just wipe with a moist cloth. Wow. All of the holes were cut so cleanly you would mistake it for paint. My camera phone doesn't capture the depth or colors accurately. Better pics will come soon. It has an amazing finish. Amazing.



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Project Galileo
professor emeritus
*****

Reged: 11/14/07

Loc: Jefferson County, Colorado
Re: The Evolution of a Lightbridge 16. new [Re: Project Galileo]
      #4957679 - 12/09/11 12:47 AM

Fellow astronomers. Presenting M42.



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bilgebay
Post Laureate
*****

Reged: 11/06/08

Loc: Türkiye - Istanbul and Marmari...
Re: The Evolution of a Lightbridge 16. new [Re: Project Galileo]
      #4957716 - 12/09/11 01:27 AM

Amazing! Wow!

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Scanning4Comets
Markus
*****

Reged: 12/26/04

Loc: Deep Space!
Re: The Evolution of a Lightbridge 16. [Re: bilgebay]
      #4957762 - 12/09/11 03:35 AM

I second that! I LOVE reading your posts and seeing your work.

Top notch!

Cheers,


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