"All-examining Censure, with her hundred eyes and her thousand tongues, soon discovers and as speedily divulges in all quarters every least crime or foible...
... In time I'm sure I will :) I am getting together the supplies for a 10" now. I figure each time you jump to a larger mirror you want a size and focal ratio...
well got the base made and flim attached to base. did have an image reflected but wasn't good enough for veiwing. have decided to get rid of this monster. due...
I played with your data today and couldn't pin down what the error might be. I compared your numbers with those in suiter_c.txt ( the caustic example that ...
Bob May is stil in Palomar Hospital in Escondido at least for the next two weeks, he is healing up slowly and has no computer contact, but possible by the end...
... light ... sweat ... tighter ... LWT ... touching), ... fine!). ... wider ... Thanks for the reply Nils The main reason I went to the Caustic was that I...
... Dave, Thanks for the input. BTW the ROC is 1889mm , a f4.65 (I hate metric) And yes I did figure out to cut my Y in half for the program. But what is...
Hi Group... I have changed the Home Page photo to show how I trepanned a 26.5 inch disk out of PYREX sheet glass. I originally tried to use common galvanized...
Hey Guys... I put some more photo's and comments of the trepanning process I used in the "Files" section under the filename "Trepanning", of course. As a...
So heavy duty plumbers tape isn't really tape is it? (When I read your description of the process and came to heavy duty plumbers tape a BIG huh? hit me.) Your...
Has anybody figured out away to plot numericaly or describe the sagitta or complete parabola of lets say a 12 in mirror all the way across its diameter? It...
Thank you Ken for posting these great photos. How thick was that glass? 2"? The heavy duty plumbers tape is really just metal braces? How much carbo did you...
... If I understand your question correctly, just vary the diameter in the equations. As for calculating it, there are several sites on the web; the easiest...
... The PYREX sheet glass was 1-5/8ths thick ... Yes, if you go to the ACE Hardware store and ask for "Braces" you won't be in the correct part of the store....
But I was wondering if anyone could tell me of astronomical bed and breakfasts out west? I remember there being a few, but I cant seem to find them. Or...
... Ah, yes. Is there some difficulty you are having with plotting the curve? This is a simple graphing exercise which you can do in Excel or OpenOffice. ...
... I have made several metal tools on my lathe to great use. But realize that I make a sphere not a parabola for the tool. I use the formula r=sqrt of (2RS)...
I have read a lot of reference posts from different boards on the possiblity of making aluminum mirrors but has any one on ATM ever made a mirror of aluminum?...
Ken, Looks like a great way to produce large circles using easy to find materials! I have experience coring with 4 to 6-inch aluminum tubing tools in a low...
... I would assume it would... It was easy for me to make the 8 teeth out of the piece of plumbers tape I had sitting around. Didn't have much more material...
Hello all; Just out of curiosity, how big a diameter mirror can be reasonably made from 3/4" glass? Not that I have any, but you never know. Clear and dark...
... The largest I've seen sucessfully are 16" mirrors. Maybe you could stretch it to a 17" ;) Mitch Look up "The fourty pounder" scope of google and there is...
Greetings, Please pardon this off-topic post, but I'm having a bit of a time with this one, and I suspect there are chemists in this group that can help. I'm...
Dave, Have you tried Ferric chloride? See http://artmondo.net/printworks/articles/ferric.htm -Don ... with this ... be ... brass with a ... test the plan, ... ...
