Search found 27 matches

by Duncan Wilkie
Wed Jan 10, 2018 12:26 am
Forum: The Trading Post
Topic: Looking for Someone to Go In With on a Bubble Dosimeter
Replies: 2
Views: 127

Looking for Someone to Go In With on a Bubble Dosimeter

I've been in contact with the bubbletech company that makes these neutron dosimeters, but the minimum order is 2. Anyone else who needs one I would be open to purchasing one for you (with your financial contribution, obviously) and then shipping them to you. The quote I've been sent is $164 apiece w...
by Duncan Wilkie
Mon Jan 08, 2018 3:15 am
Forum: New User Chat Area
Topic: A Quick Question
Replies: 2
Views: 125

A Quick Question

Is Loctite 290 (or similar) acceptable on NPT at foreline pressures?
by Duncan Wilkie
Mon Jan 08, 2018 2:49 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: The Beginnings of a Fusor Electrical System
Replies: 53
Views: 6207

Re: The Beginnings of a Fusor Electrical System

I have a question regarding current metering. The schematic on the FAQ for a center-tapped transformer (here) shows grounding to a metal case. I don't have a metal case on my device. I assume I simply place it in the ground loop of my device, but can I do this with an ac transformer?
by Duncan Wilkie
Fri Dec 29, 2017 4:39 am
Forum: Images du Jour
Topic: My WIP Fusor
Replies: 1
Views: 179

My WIP Fusor

This is my vacuum system in its current form. At the moment I'm waiting on some friends to get back from vacation to help me weld and machine the chamber. My diff pump was picked up on eBay and seems to be in great condition. Still gonna give it a good scrub with a scotch-brite and a soak in acetone...
by Duncan Wilkie
Thu Dec 28, 2017 1:38 am
Forum: Vacuum Technology (& FAQs)
Topic: A Few Quick Vacuum Questions
Replies: 3
Views: 172

A Few Quick Vacuum Questions

Ok so I’m pretty close to having all the components of a working fusor on hand and had a few questions. 1: Can I use only a ball valve in the forline? It seems that flow rate doesn’t need to be controlled here. Would a valve for plumbing suffice or are there vacuum-rated ball valves? Also, how can I...
by Duncan Wilkie
Sun Aug 27, 2017 8:40 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: The Beginnings of a Fusor Electrical System
Replies: 53
Views: 6207

Re: The Beginnings of a Fusor Electrical System

The output voltage measured between pins 3 and 8 and between pins 4 and 8 was a very stable 400V at 1V input. Similar results were observed with the other primary. However, when jumpering them in parallel, there was only a 100V increase in voltage from the original 400. Jumpering in series yielded a...
by Duncan Wilkie
Wed Aug 02, 2017 11:18 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: The Beginnings of a Fusor Electrical System
Replies: 53
Views: 6207

Re: The Beginnings of a Fusor Electrical System

The new step-down yielded strange results as well; all voltages I could find on with inputs on pins 5-12 had highly variable values. bruh.jpg The connections that were under and around a volt actually seemed to be exactly what my input voltage was (input 1V with the step-down, output 1V for the lowe...
by Duncan Wilkie
Tue Aug 01, 2017 10:43 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: The Beginnings of a Fusor Electrical System
Replies: 53
Views: 6207

Re: The Beginnings of a Fusor Electrical System

Bit of a diagnosis on my problem yesterday: I did some digging into my step-down's wiring and it was designed for use with a dimmer circuit. The state of the transformer without a dimmer circuit is full 120v through the output. So, yeah I ran a calculation and that was approximately 1.6 kV running t...
by Duncan Wilkie
Tue Aug 01, 2017 1:32 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: The Beginnings of a Fusor Electrical System
Replies: 53
Views: 6207

Re: The Beginnings of a Fusor Electrical System

So, after ordering some more alligator leads, I ran a test on my fusor. I had imperceptible voltages across all points with backwards wiring. I switched my measuring lead to be on 3 and 4, and turned my variac down to under 5 volts, put my inputs on pins 5 and 6, and turned the input on. The output ...
by Duncan Wilkie
Sun Jul 23, 2017 4:30 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: The Beginnings of a Fusor Electrical System
Replies: 53
Views: 6207

Re: The Beginnings of a Fusor Electrical System

I feel that I first have to apologize for any perception of my ability as inadequate or lacking, as most of the time it seems to be my incoherency or unclear explanations that lead to these situations. This is my attempt to clarify my goals and what I know and don't know. I'll first explain how I ap...