Re: ATM A three tube scope like Alice

["Albert Highe" <ahighe@ix.netcom.com>]

David,

I had similar thoughts after seeing the Alice design. I also wanted a more
symmetrical scope and to position the focuser for more comfortable viewing.
Check out my webpage to see a number of iterations on scope designs using
three struts.

http://pw2.netcom.com/~ahighe/astroequ.html

Albert

----- Original Message -----
From: David Eisert <deisert@src.wisc.edu>
To: <atm@shore.net>
Sent: Friday, August 25, 2000 12:45 PM
Subject: ATM A three tube scope like Alice


>
> I am trying to build my first scope (8" / f6) and was planning on
following
> the Alice design. But I would like the ability to move the focuser about
> 45 deg. This would require a complete UTA rather than a simple
> focuser board. Would adding a third tube be stiff enough ? The three
> tubes would be in three corners and the forth corner would have the
> focuser. The UTA would have to be nested in the mirror box so the tubes
> would have to angle in about 2 deg. I could use a similar tube mounting
> method but the mounting bracket on the UTA would be at a 45 deg
> angle rather than a 90 deg angle with respect to the mirror box bracket.
> Would it be better to add a forth tube under the focuser but of course
> using a different mounting method (i.e. copper flare fittings) ?
>
> ___________
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>
>
> TIA
>
> Dave
>
>