Search found 78 matches

by Greg Courville
Thu Feb 02, 2017 9:33 pm
Forum: New User Chat Area
Topic: Bolts for vacuum chambers
Replies: 12
Views: 1811

Re: Bolts for vacuum chambers

I'm curious why plain high-grade carbon steel bolts are not used for atmosphere-side bolting. Yeah, you get carbon contamination on the other parts which can cause them to start rusting. For a lot of physics applications it's also desirable to have "nonmagnetic" hardware. Actually, 304 or 316 faste...
by Greg Courville
Fri Jan 27, 2017 1:28 am
Forum: New User Chat Area
Topic: Can you connect multiple neon transformers in series?
Replies: 35
Views: 5152

Re: Can you connect multiple neon transformers in series?

My guess would be that you are seeing bremsstrahlung X-rays tapering off as the voltage on your multiplier stack bleeds down. Once the discharge dies out there's no real load, so you could have significant voltage on the grid for quite a while. Note that a regular GM tube will be vastly more sensiti...
by Greg Courville
Fri Jan 27, 2017 12:51 am
Forum: New User Chat Area
Topic: Bolts for vacuum chambers
Replies: 12
Views: 1811

Re: Bolts for vacuum chambers

At work I always insisted on 12-point silver plated bolts and platenuts. Compared to the fasteners we were using inside the vacuum system, the cost of proper bolt kits for the flanges really wasn't that bad, and they save a lot of time and headache versus a hardware store solution. Things go togethe...
by Greg Courville
Thu Jan 26, 2017 4:07 am
Forum: New User Chat Area
Topic: Can you connect multiple neon transformers in series?
Replies: 35
Views: 5152

Re: Can you connect multiple neon transformers in series?

So, to sum up: in a single 10-second burst, you managed to generate enough neutrons to activate your silver sample to such a degree that you could readily pick out the 110Ag decay curve with a pocket Geiger counter, despite the sample sitting in the open at least a few feet away from the source, pre...
by Greg Courville
Tue Jan 24, 2017 8:27 pm
Forum: New User Chat Area
Topic: Can you connect multiple neon transformers in series?
Replies: 35
Views: 5152

Re: Can you connect multiple neon transformers in series?

Hi Ben,

Could you clarify what your silver activation setup looked like? From your comments on YouTube it sounds like you were holding the silver in hand behind one or more water cooler jugs at some distance from the device, is that right?
by Greg Courville
Fri Jan 20, 2017 8:28 am
Forum: New User Chat Area
Topic: Will they fit? Look at pics...
Replies: 8
Views: 1234

Re: Will they fit? Look at pics...

As others have said, those are VCR fittings on the valve, and a simple NPT threaded port on the KF adapter. You might be able to find a suitable adaptor on Ebay (at a glance, looks like there are quite a few results for NPT to VCR adaptors, but whether there's something in there with the correct com...
by Greg Courville
Wed Jan 18, 2017 7:50 am
Forum: New User Chat Area
Topic: Can you connect multiple neon transformers in series?
Replies: 35
Views: 5152

Re: Can you connect multiple neon transformers in series?

From the YouTube comments section: I only did one run where I actually detected neutrons and didn't get any footage of it because I was hiding behind some water bottles. I didn't fire it up again because I melted the NST and didn't want to get irradiated any further. Um. The neutron causing reaction...
by Greg Courville
Sat Nov 26, 2016 3:45 am
Forum: Announcements and Site Administration Topics
Topic: Posts being auto-locked
Replies: 2
Views: 896

Posts being auto-locked

Hello all, I've noticed that posts get locked to deletion or further edits after a certain amount of time. While I'm in favor of such a policy for the most part, on the Trading Post it gets to be a bit of a problem when trying to use that forum as instructed. Is it possible for the admins to control...
by Greg Courville
Tue Apr 26, 2016 1:25 pm
Forum: Images du Jour
Topic: Fusion Claim- Kuba and Noah
Replies: 17
Views: 5260

Re: Fusion Claim- Kuba and Noah

Congrats! Nice to see that you made it.

That pump must have been hungry! I don't think I ever managed to move the cylinder gauge more than an hair in several hours of D2 operation...
by Greg Courville
Sat Mar 12, 2016 2:52 am
Forum: New User Chat Area
Topic: Is this is a good thermocouple
Replies: 4
Views: 998

Re: Is this is a good thermocouple

I just sold a DV-6 type tube for $5 and a complete gauge setup for $65. You can definitely do better than $120 if you're willing to wait (and gamble) a bit.