Re: ATM Active mirror figure correction?

["Mike Marchand" <bmarchan@mnsi.net>]

Hiya!

> There was an article in S&T in the early '90s about a guy, who amongst
> other things, had a 6" mirror he glued a bolt to in the middle, supported
> the rim with carpet, and tuned his way to a good figure by adjusting the
> tension on the mirror by turning the nut on the bolt.

Try this:

S&T, June 1992, pg. 684 to 686, Three Innovations In A Dobsonian, William E.
Kelley

also see:

S&T, July 1990, pg. 93 & 95, Free Floating Dobsonians, by the same author,
for his novel friction control on a dobsonian (if you're interested in his
other ideas).

Also see:

S&T, Sept 1990, Focal Point, The Telescope Widow Syndrome... <g>

I'll leave it to your best judgement to decide which of the 3 articles is
most useful to you !!! <vbg>

 - mike