Re: ATM Beginner-Before I build this thing

[Brian Lloyd-Newberry <newbeb@yahoo.com>]

Hey Charles et all,

   I recently got really excited about using PVC tubing to build a
really  cheap focuser for my just started project. I went to the local
hardware store with my brain in neutral.

   I picked up several of ~2" ID threaded joints two female "ends" and
one male piece about 3" long with threads over the entire outer
surface. I thought that I could make a really nice focuser with this
and was very excited.

   When I got home I realized after some fiddling that all the pieces
have tapered threads and that they won't work for a focuser. I am only
out about $5 on the experience so I am not that bummed.

   To the point, does anyone out there have any idea where I can find
2" ID theaded PVC connectors that have non-tapered threads? I can't
seem to find them at my local hardware store or home depot (the
hardware store has a better selection of fittings). Someone suggested
specialty plumming houses (where i have had no luck) and my searching
online has revealed that it is hard to find what you are looking for
online. :)

   Is this a "waste" exercise? I like the smoothness of the motion of
the pieces I have now until the tapering kicks in to lock them
together. I can't imagine how nice it would be to have a cheap focuser
with the same motion that I can throw together for < $10. I of course
am valuing my time at nothing which is what most all of us do here. :)
(it is more fun that way).

-Brian


--- Charles F <quantemlp@hotmail.com> wrote:
> 
> helly,
> yes.  I went to my local home depot and purchased a 1 1/4" coupling
> tread 
> (male) to electrical pvc. along with that, I also bought its female
> mate. 
> these two go together nicely. I get about 1 1/4" travel painted
> black, looks 
> great. I am going to have some photos of the 8" f/6 truss scope I am 
> building (first project) sometime soon. the parts cost a total of
> $2.93.
> 
> 
> >From: "Dave Richardson" <yickityoptorus@hotmail.com>
> >
> >O.K.  I've got all the basic pieces parts for a 6" F8 Dob.  I would
> >appreciate some feedback on some final questions before I start
> cutting and
> >drilling.

(snip)

> >So does anyone have any ideas for a really good 1 1/4" homemade
> focuser?
> >
> >As always, all responses greatly appreciated.
> >
> >Dave Richardson
> >


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