Return to the Cloudy Nights Telescope Reviews home pageAstronomics discounts for Cloudy Nights members
· Get a Cloudy Nights T-Shirt · Submit a Review / Article

Click here if you are having trouble logging into the forums

Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User

Equipment Discussions >> Classic Telescopes

Pages: 1 | 2 | (show all)
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Finally finished my 76x1218mm "Jaegertron"
      #5850122 - 05/09/13 02:18 PM Attachment (31 downloads)

Last weekend I finally finished my 76x1218mm "Jaegertron" whose cell design I first discussed in this earlier thread:

http://www.cloudynights.com/ubbthreads/showflat.php/Cat/0/Number/5666072/page...

Sadly, I still haven't had decent weather for the first star test. I began with a Unitron Model 140 tube, focuser, and dew shield and a Jaegers 83mm x 1278mm air spaced objective.

The final telescope wound up being a tad heavier than my complete Unitron #140. Here it is lying on the daybed in the study so you can get an idea as to how long the OTA is.

Here she is:


Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Finally finished my 76x1218mm "Jaegertron" new [Re: terraclarke]
      #5850126 - 05/09/13 02:19 PM Attachment (21 downloads)

Here's the business end with the objective in place.

Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Finally finished my 76x1218mm "Jaegertron" new [Re: terraclarke]
      #5850128 - 05/09/13 02:20 PM Attachment (16 downloads)

Here's the custom 1.25 inch visual back that goes into the standard Unitron #140 focuser.

http://www.cloudynights.com/ubbthreads/showflat.php/Cat/0/Number/5830263/page...


Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Finally finished my 76x1218mm "Jaegertron" new [Re: terraclarke]
      #5850135 - 05/09/13 02:22 PM Attachment (14 downloads)

On the bench during final assembly.

Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Finally finished my 76x1218mm "Jaegertron" new [Re: terraclarke]
      #5850137 - 05/09/13 02:23 PM Attachment (12 downloads)

Dew shield is press fit. Lots of dirty, greasy fingerprints

Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Finally finished my 76x1218mm "Jaegertron" new [Re: terraclarke]
      #5850140 - 05/09/13 02:25 PM Attachment (11 downloads)

Had to use the lathe to open up the previously threaded dew shield for a nice snug press fit.

Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Finally finished my 76x1218mm "Jaegertron" new [Re: terraclarke]
      #5850145 - 05/09/13 02:28 PM Attachment (13 downloads)

Here's the finished objective cell (see previous thread).

Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Finally finished my 76x1218mm "Jaegertron" new [Re: terraclarke]
      #5850149 - 05/09/13 02:29 PM Attachment (8 downloads)

Down the tube. Note the thread in retaining ring.

Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Finally finished my 76x1218mm "Jaegertron" new [Re: terraclarke]
      #5850153 - 05/09/13 02:31 PM Attachment (10 downloads)

The tube is tapped to hold the cell without requiring nuts. Here you see the cell in the indexing chuck on the milling machine to drill holes at 72 degrees apart to match those in the tube.

Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Finally finished my 76x1218mm "Jaegertron" new [Re: terraclarke]
      #5850182 - 05/09/13 02:45 PM Attachment (14 downloads)

For your comparison.

Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Finally finished my 76x1218mm "Jaegertron" new [Re: terraclarke]
      #5850185 - 05/09/13 02:47 PM Attachment (8 downloads)

2

Post Extras: Print Post   Remind Me!   Notify Moderator  
starman876
Postmaster
*****

Reged: 04/28/08

Loc: VA
Re: Finally finished my 76x1218mm "Jaegertron" new [Re: terraclarke]
      #5850186 - 05/09/13 02:48 PM

you will find a very nice star test. I have one of those lenses, but and 800mm version, I put in an old cresent scope I have. Lens fit perfectly in the cell. Had to cut off a few inches of the tube. Very nice veiws. you will be very happy.

Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Finally finished my 76x1218mm "Jaegertron" new [Re: terraclarke]
      #5850192 - 05/09/13 02:49 PM Attachment (8 downloads)

3

Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Finally finished my 76x1218mm "Jaegertron" new [Re: terraclarke]
      #5850195 - 05/09/13 02:50 PM Attachment (10 downloads)

4

Post Extras: Print Post   Remind Me!   Notify Moderator  
starman876
Postmaster
*****

Reged: 04/28/08

Loc: VA
Re: Finally finished my 76x1218mm "Jaegertron" new [Re: starman876]
      #5850198 - 05/09/13 02:51 PM

I did not notice, but did you blacken the inside of the lens cell? If you do not it will cause reflections.

Post Extras: Print Post   Remind Me!   Notify Moderator  
terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Finally finished my 76x1218mm "Jaegertron" new [Re: starman876]
      #5850201 - 05/09/13 02:53 PM

Thanks Johann. Yes, I have the flat black opaquing paint. I will do that as I finish fritzing with it.

Post Extras: Print Post   Remind Me!   Notify Moderator  
bremms
Carpal Tunnel
*****

Reged: 08/31/12

Loc: SC
Re: Finally finished my 76x1218mm "Jaegertron" new [Re: terraclarke]
      #5850256 - 05/09/13 03:14 PM

Hope you get to look through it soon. Glad you got it mounted and on the tube. Congrats!

Post Extras: Print Post   Remind Me!   Notify Moderator  
R Botero
Pooh-Bah


Reged: 01/02/09

Loc: Kent, England
Re: Finally finished my 76x1218mm "Jaegertron" new [Re: terraclarke]
      #5850268 - 05/09/13 03:19 PM

Great result Terra! Congratulations!

Roberto


Post Extras: Print Post   Remind Me!   Notify Moderator  
starman876
Postmaster
*****

Reged: 04/28/08

Loc: VA
Re: Finally finished my 76x1218mm "Jaegertron" new [Re: R Botero]
      #5850272 - 05/09/13 03:23 PM

now it is time for a shootout

And on tonights card is Mr. Unitron and Mr. Jeager.

Protect yourselves at all times and may the best lens win.

Get ready to rumble


Post Extras: Print Post   Remind Me!   Notify Moderator  
bremms
Carpal Tunnel
*****

Reged: 08/31/12

Loc: SC
Re: Finally finished my 76x1218mm "Jaegertron" new [Re: terraclarke]
      #5850301 - 05/09/13 03:38 PM

Hope you get to look through it soon. Glad you got it mounted and on the tube. Congrats! Mine is really superb.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1 | 2 | (show all)


Extra information
15 registered and 20 anonymous users are browsing this forum.

Moderator:  Rich (RLTYS), Brian Risley 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 697

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics