RE: ATM 16" string scope finished!

[Matt Vartanian <MVartanian@harlandfs.com>]

Thanks Jan.  I do not use the turnbuckles when setting up.  Normally they
should not be adjusted.  Instead tensioning is done by turning the Aluminum
poles which unscrews a bolt.  Because the string is so low stretch, the
whole system goes from slack to rigid very quickly.  The tension is what I
would call hand tightened.  The system is rigid enough that with a laser
collimator installed, the spot on the primary moves less than 1mm when the
scope is swung from vertical to horizontal.

-----Original Message-----
From: Jan van Gastel [mailto:jhm.vangastel@wanadoo.nl]
Sent: Sunday, April 15, 2001 12:16 AM
To: ATM; Matt Vartanian
Subject: Re: ATM 16" string scope finished!


Very nice Matt!
How do you know the exact force to tension the strings with the turnbuckles?
Or is it not critical?

Jan
http://www.geocities.com/janvangastel/

----- Original Message -----
From: "Matt Vartanian" <MVartanian@harlandfs.com>
To: <atm@shore.net>
Sent: Saturday, April 14, 2001 10:32 PM
Subject: ATM 16" string scope finished!


>
> Hi everyone, I received my 16" f/4.5 Swayze mirror two weeks ago and was
> able to finish my string scope.  I had started this project back in
> September, and with the arrival of the mirror I was able to finally cut
the
> scope to length and balance.  I am happy with the results, let's see how
it
> holds up on a night out.  You can see some new pictures of this scope at:
> http://mvartanian.tripod.com/stringscope.htm
>
> Matt Vartanian
>
>