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Re: [ATM] Using brass
Dan,
I'd love to see your focuser plans if you're willing!
Jack
-----Original Message-----
From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net] On Behalf Of
Daniel Fundo
Sent: Wednesday, December 20, 2006 11:36 PM
To: Dan
Cc: atm@atmlist.net
Subject: Re: [ATM] Using brass
<< I'm wanting to build an antique looking dob using brass tube for the
three struts (to keep weight down) as well as for connecting the two halves
of the primary and secondary mirror cage assemblies. >>
Dan, Someone must be reading the archives, or bugging my computer!!! <G> I
have talked about such a scope numerous times on the list. Mine will be oak
and "brass"
You can get anodizing or brass plating done if you wish for the truss tubes.
You can also get a dull brass, or antique brass in powder coat.
I saw a website some years ago that sold shrinkable sleeves for tubing
(aluminum, steel, PVC, whatever) for the advertising industry. All you need
is a smooth finish on the tubing, and a heat gun. The stuff is something
like 2 mil Mylar and comes in a whole rainbow of colors and is quite scuff
proof. (I scrounged some tubing from a display being tossed out behind a
store. When I got it home, I discovered it was a "plastic" layer on the
aluminum.) I just tried the URL, and its dead. I'll look around and see if
I can find a new one.
As for a focuser, why not make a Crayford from wood. I have plans if you
want them. As for the finder tube, find some heet activated adhesive veneer
(like Rockler sells....add std disclaimer) and make it from several layers
of that. I made one some time ago by just ironing three layers together.
It wasn't as stiff as aluminum, but it weighed next to nothing!.
*****-----
Dan F.
Memphis, TN
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