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Old 21-02-2008, 09:32 PM
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doug_parkes
Sylvania NSW

doug_parkes is offline
 
Join Date: Feb 2008
Location: Sylvania, Sydney, Australia
Posts: 28
dobsonian truss pole locking seat

Quote:
Originally Posted by norm View Post
Welcome to the forum Doug. I spoke to you at lengths one night on a SASI viewing session at Waterfall. I think I picked your brains out on your Obsession clone - its a beauty. I was really impressed how the truss poles connected to the lower tube assembly, very unique.

BTW: I must attend SASI again soon, I'm in the bad 'books' no pun intended with Vic!

Norm
hi Norm, yes, the truss pole locking system operates very well indeed. The surprising thing is that it is one of the three methods recommended by Dave Krieg in his book about how to make a dobsonian telescope. Admittedly, making the truss pole seats requires a lathe but the resulting pole locking is outstanding and I cannot understand why everyone else doesn't use that same design! In my dob I have also designed a secondary mirror holder that can be accurately adjusted by hand (without any tools) even when wearing a thick winter glove! This design makes collimation very very easy. I believe the design to be unique. I haven't seen it copied yet. Regards, Doughttp://www.iceinspace.com.au/forum/....es/happy19.gif
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