... a sphere ... Hi James, I hope you are well and your "mirror challenge" successful(I follow most of the mirror-making groups). I hope it will remain a...
4062
James Mulherin
jamesmulherin
Sep 2, 2004 1:15 am
... For production work we always polish with a full size lap using the standard 1/3 width stroke centered left to right on the mirror. We stop the machine ...
4063
John
owl18200
Sep 3, 2004 3:47 am
... already. ... you take ... there? ... Thanks James for the info on polishing, I have a plan to follow now. I've worked alittle more on the sphere with the...
4064
James Mulherin
jamesmulherin
Sep 4, 2004 2:46 pm
Hey group: I've put another 16" x 3" mirror blank up for auction on eBay. Here's a link if anyone is interested. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem ...
4065
John
owl18200
Sep 7, 2004 7:05 am
... Hello James, Please take a look at my latest ronchi photos under "John A's" photos in this group when you get some free time. They are dated 9-7- 04, one...
4066
Mel Bartels
Mel_Bartels
Sep 7, 2004 7:16 am
... Immediately channel two 90 deg escape routes for trapped air bubbles after the pitch will keep a shape, but before you attempt to press. ... Reheat with a...
4067
John
owl18200
Sep 7, 2004 7:29 am
... poorly ... bubbles after ... within a ... Thanks for the advice Mel, I thought I'd experienced most mishaps during the grinding of this glass(other than...
4068
Richard Schwartz
theoboehm
Sep 7, 2004 3:28 pm
Ugly holes in yer pitch lap? Fill 'em in with a few drops from a chopstick and then... smooth the area with light application of flame from a blowtorch. If...
4069
James Mulherin
jamesmulherin
Sep 8, 2004 10:35 pm
John: I apologize for taking so long to get back to you. I looked at your Ronchi images. Yes, this looks like a good place to start. The important thing is ...
4070
John
owl18200
Sep 9, 2004 1:09 am
... Ronchi ... thing is ... is high ... recommend a ... some images ... E-mail ... Hi James, Seeing as this is not a salary-paying position for you -helping me...
4071
James Mulherin
jamesmulherin
Sep 9, 2004 12:48 pm
John: I'll E-mail you a set of runs to start with this evening. Remind me; what is your mirror's focal length? James James Mulherin Optical Mechanics, Inc. ...
4072
John
owl18200
Sep 10, 2004 9:15 am
... me; what is ... Hi James, The center of curvature from my knife-edge tester reads 149 10/16" (149.625"). This is where the image blacks out evenly when...
4073
James Mulherin
jamesmulherin
Sep 10, 2004 12:30 pm
... Ok. The first set of runs will all be center over strokes made with the 50% tool. There are two types of stroke. One deepens the center, the other puts ...
4074
Ben Davies
b3davies
Sep 10, 2004 9:53 pm
I was a little nervous even before a mountain lion carried off my neighbors goats. It jumped over an 8' high fence while carrying them away. That's pretty...
4075
Bob May
a52chevybob
Sep 11, 2004 12:05 am
Sounds like it is time for a new dog! Bob May http://nav.to/bobmay bobmay@... NEW! http://bobmay.astronomy.net...
4076
Richard Schwartz
theoboehm
Sep 11, 2004 3:15 am
First you must file an environmental impact statement with the animal rights and the Sierra Club people. Then you can leave poisoned meat laying around and...
4077
John
owl18200
Sep 11, 2004 5:10 am
... series of ... this set ... before and ... Also, ... blocks of ... Ok James, I've posted 2 graphs of the surface error of my 16" under "John A's Photos"....
4078
James Mulherin
jamesmulherin
Sep 11, 2004 1:14 pm
John: I like the white version best. I don't have the option of viewing an enlarged image. I think this option is only available to the owner of the folder. I...
4079
planetmanwest
Sep 11, 2004 6:56 pm
... Sorry about you dog Ben. :( I too deal with four-legged predators in the areas I frequent in the dark. Here are my realistic suggestions: 1) Dogs are...
4080
planetmanwest
Sep 11, 2004 7:01 pm
P.S. When/if it comes down to it practice the 3 S's: Shoot, Shovel, and Shut up. There are some folks these days that have the misguided opinion that animals...
4081
John
owl18200
Sep 11, 2004 8:53 pm
... of the ... section so I ... Ok James, I've reposted the glass surface error graph in "John A's Files" Folder in this group. It is a jpeg of the white...
4082
James Mulherin
jamesmulherin
Sep 12, 2004 2:53 pm
Thanks John. I'll wait for the new test results. James James Mulherin Optical Mechanics, Inc. jcmulherin@... www.ProSpecMirrors.com Tel: (319)...
4083
William Gnirrep
perring41
Sep 12, 2004 5:45 pm
I am looking for plans/directions on how to make a parallelogram binocular mount. Can anyone help me? Thanks in advance Bill Gnirrep...
4084
timavv@...
tiafolla6505
Sep 12, 2004 7:08 pm
This is a link to an informative web site I found regarding materials and methods for polishing and grinding: http://us-products.com/sitehtml/lappingabrs.html ...
4085
Ken Hunter
atm_ken_hunter
Sep 12, 2004 8:02 pm
... snip ... snip ... Get another dog, a rifle and learn how to use it. Ken Hunter...
4086
Ken Hunter
atm_ken_hunter
Sep 12, 2004 8:18 pm
John, James... Thanks for keeping this on the ATM_FREE Group site... I think there may be many silent readers out there keeping an eye on John's progress with...
4087
Chuck
cscappaticci
Sep 12, 2004 9:18 pm
I've got a 95 lb. Lab and .45 Super Pistol. The Lab is there to scare the critters away and give warning. The gun is to protect the Lab ... Clear Skies, ...
4088
Chris
chendelle
Sep 13, 2004 12:21 am
i prefer the 12 gauge pump with the short brass shells. those high brass magnums are too rough on my shoulder. number 4 gives a handfull of BB's nice...
4089
pdebaan
Sep 13, 2004 1:13 am
Hi William I have a picture of a homemade par.bino.mount, It is really quite simple to make as long as you make the moving connecting joints,the vertical and...
4090
planetmanwest
Sep 13, 2004 2:52 am
... Here is a link to one. Even if you don't want to go to this level of detail, the design considerations and balance information may help. ...
