My new DOB design

[Anil]

Hi all, i refurbished a old 6" telescope which was gathering dust at a school in Bangalore. Telescope mount is made of 19mm plywood. Base is attached with 3 wheels for smoother movement. Old paper mash tube was replaced with a 7" PVC tube. Here in this design mirror cell is modified with a 1400 grams counter weight to balance the scope. Helical focusser was machined to replace a cheap plastic one, finder scope was also developed from a aluminium ring, lot of work....took one month to complete the scope. There is no conventional cradle here, this is replaced with a 1 inch thick circular wooden blank attached to the tube. Optical performance is quite good. Lot of running around to get things done but i really enjoyed this project. After my DIY refractor building this is my second telescope making project in 14 months. More working pictures here at http://anilmn.blogspot.com/ (MY DIY PAGE)


Anil

[spacezebra]

Excellent - how does the Helical work, I have never seen that before.

Cheers Petra d.

[mswhin63]

Nicely made, PVC would be interesting how well that goes with temperature variations. Love the Focuser design, onlu once moving parts heaps reliable.

[DavidU]

Anil, very nice DIY work there ! Is there anything you can't do?
Well done.:thumbsup:

[Anil]

Thanks Petra, helical focusser works fine with zero image shift. As we do not get metal focusser here i replaced a fragile plastic rack & pinion with a machined aluminium one, works great!!!!


Regards,
Anil

[Anil]

Hi, pvc tube requires cooling time of 20 minutes.


Rgards,
Anil

[spacezebra]

Hi Anil

I would be interested in the mechanics behind it, its really got me intrigued.

Cheers Petra d.

[scopemankit]

Nice job! You must feel very proud!

[nightstalker]

Great work Anil :thumbsup:

[Inmykombi]

Looks kinda space age.
Nice work there.

[astro_nutt]

Great work there!