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atm_free · Amateur Telescope Making

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  • Members: 1512
  • Category: Telescopes
  • Founded: Jun 1, 2002
  • Language: English
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Messages 11698 - 11728 of 23380   Oldest  |  < Older  |  Newer >  |  Newest
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11698 Ken Hunter
atm_ken_hunter Send Email
Feb 1, 2008
2:39 pm
... be ok. I ... Tony, When I cut a blank into two parts I use a horizontally orientated diamond saw blade to make the initial cut as deeply as the diamond saw...
11699 ssb73q Send Email Feb 1, 2008
3:19 pm
Hi Ken, with the premium that large annealed blanks are more valuable that thin blanks, isn't cutting a blank in half much like turning a large diamond into...
11700 a.johnw Send Email Feb 1, 2008
4:08 pm
On design and understanding what you are doing I posted this a while ago. It's not as complicated as it sounds. Even a play arround will give you some idea...
11701 zway2bisfancyfree
zway2bisfanc... Send Email
Feb 1, 2008
7:48 pm
... Tony, I thought of doing something similar to Ken's idea. Start with a blade and put a small grove all the way around the blank, then use steel braided...
11702 Tony Gondola
acgna Send Email
Feb 1, 2008
8:16 pm
It's a lot like the way they cut large blocks in stone quarries these days except they use a diamond cutter cable rather then abrasive. Tony ... From:...
11703 astroguy_2007 Send Email Feb 1, 2008
9:05 pm
Does anyone have anymore info on this tandy scope mount? http://tech.ph.groups.yahoo.com/group/atm_free/photos/view/f3e0?b=1 I would like to have more info on...
11704 Bobby Heid
bh812000 Send Email
Feb 3, 2008
3:04 am
Hi Richard, No, my tube did not have rolled ends. But it has been about 14 years since I bought it. Maybe it was Nebraska. Bobby From:...
11705 Tony Gondola
acgna Send Email
Feb 3, 2008
5:23 pm
Here's a 3 frame mosaic of the south polar area from 1-19. To locate yourself, the crater Moretus is at the bottom of the frame, center: ...
11706 Ken Hunter
atm_ken_hunter Send Email
Feb 3, 2008
7:28 pm
... Yes... You can sell the BIG diamond once to a limited number of possible customers but smaller diamonds have a greater potential customer base, with likely...
11707 HARLEY DAVIDSON
astrocnc Send Email
Feb 4, 2008
12:12 am
tony thats like being there--great shot! tony ... From: Tony Gondola To: videoastro@yahoogroups.com ; NEWTONIAN_ATM_and_IMAGING@yahoogroups.com ;...
11709 Dave
iridium5410 Send Email
Feb 4, 2008
3:04 pm
Well, that was special. I'm glad my email client trashed the graphics. Is this site moderated? - Dave G....
11710 Tony Gondola
acgna Send Email
Feb 4, 2008
3:18 pm
Thanks! Tony ... From: HARLEY DAVIDSON To: atm_free@yahoogroups.com Sent: Sunday, February 03, 2008 5:12 PM Subject: Re: [atm_free] Lunar South Pole tony thats...
11711 Ken Hunter
atm_ken_hunter Send Email
Feb 5, 2008
8:20 pm
... graphics. ... YES! The ATM_FREE Group is moderated. I approve all new members after they have been signed up for one week or more automatically or as soon ...
11712 amalaga2020 Send Email Feb 6, 2008
1:33 am
We need you - Thanks ... after ... soon ... Sept ... through ... been...
11713 Ken Hunter
atm_ken_hunter Send Email
Feb 6, 2008
7:34 am
Hi Guys and Gals... I have added Richard F.L.R. Snashall and Thomas Janstrom as moderators for the ATM_FREE Group and will be "training"; them in my mostly...
11714 zway2bisfancyfree
zway2bisfanc... Send Email
Feb 8, 2008
3:43 am
I have a couple of questions for those who have sucessfully made flats using the 3 blank method. I think I'm ready to try a refractor doublet so a flat will...
11715 Tony Gondola
acgna Send Email
Feb 8, 2008
4:26 am
Yes and yes.......... Tony ... From: "zway2bisfancyfree" <dmhakenewerth@...> To: <atm_free@yahoogroups.com> Sent: Thursday, February 07, 2008 8:43 PM ...
11716 Tony Gondola
acgna Send Email
Feb 8, 2008
1:56 pm
Is anyone here currently using the CCD Slit Test or Jim Burrows' 2D Hartmann test? Tony...
11717 jacques savard
suppjos Send Email
Feb 8, 2008
3:30 pm
here jack 47'N 71'W I have the same project but whit 1\4 ordinary plated glass A- is it possible to do a good job whit this kind of glass b- is it possible to...
11718 jacques savard
suppjos Send Email
Feb 8, 2008
4:32 pm
tony you said yes yes my interrogation is what the maximum size of flat do enybody have made is a 24 inch is too large project jack 47'N71&#39;W...
11719 Stephen Koehler
steve_koehler Send Email
Feb 8, 2008
4:41 pm
Jacques, ... I have no experience making a flat, but I'm sure flats are usually made full-thickness to support them properly when standing on edge. That would...
11720 Stephen Koehler
steve_koehler Send Email
Feb 8, 2008
4:47 pm
Jacques, ... Sorry, I missed your last line about using the flat for a flex mirror. Aren't flex mirrors usually made from a sphere? Let's say you wanted a 24"...
11721 Tony Gondola
acgna Send Email
Feb 8, 2008
5:08 pm
I've made two, a 10" and a 14". I don't have a large enough machine to even consider a 24". Tony ... From: "jacques savard" <jacquessavard@...> To:...
11722 jacques savard
suppjos Send Email
Feb 8, 2008
6:10 pm
ok the completed project is to built a kind of bino scope WHY because i have some 11x50 before and now have low cost 25x100 and very happy whit it WHY i have...
11723 jacques savard
suppjos Send Email
Feb 8, 2008
6:15 pm
coorection catenary curve ... and ... see ... real> parabola but at F=15 or 20 ; not F=5 like you said ; ... 'chainette ' ... and...
11724 jacques savard
suppjos Send Email
Feb 8, 2008
6:22 pm
sorry for the multiple answering for the interogation about long focal 2 solutions A- the folded technic http://www.johanneswilm.org/mike/telescope/ B- the...
11725 Stephen Koehler
steve_koehler Send Email
Feb 8, 2008
6:24 pm
Jacques, ... If it's an f/15 or f/20, how do you plan to deal with a 30 foot to 40 foot long telescope? -- Steve Koehler...
11726 Tony Gondola
acgna Send Email
Feb 8, 2008
6:30 pm
Also, a 24" F/20 is so close to being diffraction limited that there's little point in flexing.......... Tony ... From: "Stephen Koehler"...
11727 Jacques Savard
suppjos Send Email
Feb 8, 2008
7:57 pm
I put some file in file section in jack 47'N 71'W the most interessting file is the article of jose sanisian about how to make a curve secondary jack 47'n 71'W...
11728 zway2bisfancyfree
zway2bisfanc... Send Email
Feb 8, 2008
10:13 pm
... Jack, You Canadians are my kinda "crazy" ATM. If you could make a 24 inch F15 it would need no correction and it would be 30 feet long. You could fold...
Messages 11698 - 11728 of 23380   Oldest  |  < Older  |  Newer >  |  Newest
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