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Equipment Discussions >> Classic Telescopes

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terraclarke
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Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Hummmmm, what could this be? new [Re: starman876]
      #6344295 - 01/29/14 11:20 PM

The baffle is attached to a cylinder that fits inside the tube. It had indeed slipped forward. It is now back in place, however my plan all along has been to rebaffle after I do a ray tracing. The new baffles will be made from thin aluminum plate cut on a CNC milling machine and their will be more in number. The dew shield is the one that was shipped to Brian when he received the scope but I don't know if it's original. It is not plastic, it's aluminum. However I plan on making a longer classic one out of brass.

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dawsonian2000
Carpal Tunnel
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Reged: 07/26/06

Loc: Riverview, FL, USA
Re: Hummmmm, what could this be? new [Re: terraclarke]
      #6344341 - 01/29/14 11:47 PM

Wow, Terra! Access to a CNC milling machine is indeed a blessing! The most recent baffles were made from Lexan and cut using a router with a V-groove bit, attached to a Jasper jig. Worked great. But, using a CNC machine to make yours! ...that's AWESOME! Super precise !!!

Mel


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actionhac
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Reged: 08/09/08

Loc: Seattle
Re: Hummmmm, what could this be? new [Re: dawsonian2000]
      #6344395 - 01/30/14 12:37 AM Attachment (25 downloads)

Its the original dew shield. Its looks all original.
I don't know of a way to pin down a date though because Edmund never changed the OTA. Except the very earliest telescopes used a single finder mount stalk rather than 2 rings.

The cardboard baffle tubes are held in place by the mounting studs that normally are used to bolt the tube to the saddle of a Edmund mount. Without the 2 bolts the baffle tubes can slide around in there.
I prefer using rings so the tube can be moved to balance. You can use short screws to hold the baffle tubes as shown here:


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terraclarke
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Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Hummmmm, what could this be? new [Re: actionhac]
      #6344663 - 01/30/14 08:19 AM

Thanks for the info on the baffles Robert. I plan on getting them back in place today until I can re baffle the tube and your tip is quite helpful. Actually, those dew shields are quite nice also. On more inspection, I rather like mine. They are quite sturdy and slip fit quite well. Very nice aluminum construction. I think I will maybe just have mine re-anodized as the paint is a bit rough.

Thanks Mel. I have access to CNC milling machines and CNC lathes and spot welder's along with the older analog equipment at the college where I thought for the last few years as a visiting professor. They have a manufacturing technology program there and my best friend in the faculty runs it. We were both in the same division ( physical sciences, mathematics and engineering) and worked together on several projects. That's where I have made,objective cells, eyepiece adapters, counter-weights, etc.


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Chuck Hards
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Reged: 05/03/10

Loc: The Great Basin
Re: Hummmmm, what could this be? new [Re: terraclarke]
      #6344702 - 01/30/14 08:52 AM

Are you thinking of going with more brass trim over-all, not just the focuser?

Our club has an 8" Brandt at our observatory that the builder/donor did in red with all brass trim. It is a stunning telescope.

Nice addition to your collection, Terra!


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terraclarke
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Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Hummmmm, what could this be? new [Re: Chuck Hards]
      #6344768 - 01/30/14 09:36 AM

I haven't decided Chuck. I do have a section of brass that slips perfectly over the finder's dew shield. I want to paint the finder red to match the OTA. And I have the brass drawtube you see in the photos. I may make knurled brass wheels for the original focuser (keeping the original wheels of course). If i do a brass dew shield it will be slip fit like the original. I may also make a counter-weight assembly with brass counterweights. I would like to be able to make this look like a red/black/ and brass Victorian telescope that I can convert directly back into the original in the matter of a few minutes. I see lots of possibilities for this telescope and intend to have a lot of fun with it.

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macpurity
super member


Reged: 10/24/04

Loc: Quad Cities, Iowa, USA
Re: Hummmmm, what could this be? new [Re: terraclarke]
      #6344786 - 01/30/14 09:46 AM Attachment (20 downloads)

Here is the description from the 1968 Edmund catalog. Sweet acquisition, Terra!

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madeline
professor emeritus
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Reged: 07/30/10

Loc: Bloomington, MN
Re: Hummmmm, what could this be? new [Re: terraclarke]
      #6345532 - 01/30/14 04:29 PM

Great find Terra!!!

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terraclarke
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Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Hummmmm, what could this be? new [Re: madeline]
      #6345609 - 01/30/14 05:06 PM Attachment (17 downloads)

Baffles back in place for the time being.

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terraclarke
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Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Hummmmm, what could this be? [Re: terraclarke]
      #6345620 - 01/30/14 05:08 PM

Thanks MacP and Madeline.

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dawsonian2000
Carpal Tunnel
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Reged: 07/26/06

Loc: Riverview, FL, USA
Re: Hummmmm, what could this be? new [Re: terraclarke]
      #6346449 - 01/31/14 01:44 AM

Quote:

Thanks Mel. I have access to CNC milling machines and CNC lathes and spot welder's along with the older analog equipment at the college where I thought for the last few years as a visiting professor. They have a manufacturing technology program there and my best friend in the faculty runs it. We were both in the same division ( physical sciences, mathematics and engineering) and worked together on several projects. That's where I have made,objective cells, eyepiece adapters, counter-weights, etc.




Wow! If you don't mind... With resources, credentials and skill sets like that, the significant other in your life must be feeling mighty special and fortunate; let alone lucky. Hope I am not pushing the TOA limits.


Mel


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albert1
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Reged: 01/01/07

Loc: Southern New Jersey
Re: Hummmmm, what could this be? new [Re: dawsonian2000]
      #6346462 - 01/31/14 02:03 AM

Very nice, Terra - congratulations on the newest member of the family.

I know you had your heart set on one. I'm glad it didn't take long at all.

Enjoy!!!


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photiost
scholastic sledgehammer
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Reged: 12/14/06

Loc: Montreal, Canada
Re: Hummmmm, what could this be? new [Re: terraclarke]
      #6347510 - 01/31/14 04:09 PM

Quote:

Baffles back in place for the time being.




Looks nice !



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dawsonian2000
Carpal Tunnel
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Reged: 07/26/06

Loc: Riverview, FL, USA
Re: Hummmmm, what could this be? new [Re: terraclarke]
      #6383957 - 02/19/14 01:34 AM

Hey Terra!

Any updates on the scope to report of late? Been a while since your last update regarding the baffles.

Mel


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terraclarke
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Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Hummmmm, what could this be? new [Re: dawsonian2000]
      #6384596 - 02/19/14 12:11 PM Attachment (10 downloads)

The baffles are back in place. Did a couple of tests on an antenna light several miles from my house as well as a very distant street light from my deck just before the ice came and it all looks fine. I will leave the original ones in place as they seem to be fine until when and if issues dictate. I did get rings and a rail for it and built a counter-balance weight/rod system. Now all I need is for the weather to cooperate.

We are in the midst of the February thaw today and hopefully, all the ice and snow will be gone by tomorrow. I've been unable to set either this, the Goto, or the 4" Unitron for any serious viewing as of yet. It has either been too cold, too overcast, or the ground governed in snow and ice (my backyard observing square is unnavigable still by anyone but the dogs). Spring is coming though.


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bremms
Carpal Tunnel
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Reged: 08/31/12

Loc: SC
Re: Hummmmm, what could this be? new [Re: terraclarke]
      #6384735 - 02/19/14 01:16 PM

I'm guessing the Edmund and Unitron 152 will be very similar optically.

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terraclarke
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Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Hummmmm, what could this be? new [Re: bremms]
      #6384862 - 02/19/14 02:18 PM

I don't know. Haven't had a chance to give them a fair comparison. I suspect that the Edmund is very good. However, this particular Unitron 152 is a fairly early model (mid to late 1950s) and I have heard that it's objective is absolutely magnificent. I can't wait to get it outside and under the stars.

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dawsonian2000
Carpal Tunnel
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Reged: 07/26/06

Loc: Riverview, FL, USA
Re: Hummmmm, what could this be? new [Re: terraclarke]
      #6397557 - 02/26/14 02:04 AM

Quote:

The baffles are back in place. Did a couple of tests on an antenna light several miles from my house as well as a very distant street light from my deck just before the ice came and it all looks fine. I will leave the original ones in place as they seem to be fine until when and if issues dictate. I did get rings and a rail for it and built a counter-balance weight/rod system. Now all I need is for the weather to cooperate.

We are in the midst of the February thaw today and hopefully, all the ice and snow will be gone by tomorrow. I've been unable to set either this, the Goto, or the 4" Unitron for any serious viewing as of yet. It has either been too cold, too overcast, or the ground governed in snow and ice (my backyard observing square is unnavigable still by anyone but the dogs). Spring is coming though.




Despite your weather woes, it appears that you are making good progress on the Edmund. Sometime, bad weather renders benefits, which allow you to perform maintenance to your telescopic instruments. From looking at the work you have done, you are most definitely off to get it ready well before spring thaw. ...I hope!

I see that you spared no expense on the rings! Though I have built my own in the past, I love the construction of the one's you have. That is why I have (of late) purchased several pair for future builds I have planned.

Thanks for the update!

Mel


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terraclarke
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Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Hummmmm, what could this be? new [Re: dawsonian2000]
      #6397915 - 02/26/14 09:32 AM

Thanks Mel. I figured that a long, heavy scope like this deserved a heavy-duty set of rings. Particularly since I have incorporated a rear counter-balance system so as to be able to push the tube up higher in the mount. I will place it on the Unistar Deluxe alt-az mount on a heavy-duty, extra tall steel surveyor's tripod for field use.

Yes, the one thing this winter has afforded me is time in my little workshop to do various telescope projects in order to get ready for spring. I am very much looking forward to warmer weather and it is coming. Thus far, it has only been warm enough to do solar observations with my 60 to 80 mm scopes.


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Bomber Bob
Carpal Tunnel
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Reged: 07/09/13

Loc: The Deep South, USA
Re: Hummmmm, what could this be? new [Re: terraclarke]
      #6398733 - 02/26/14 05:08 PM

"it has only been warm enough to do solar observations"

But on the bright side (pun intended), you'll be all set for Mars!


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