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Re: Plasmagun/railgun for Stelarate

A difficult project but very interesting approach. Do post as you can. Also, be very careful - cap banks are very dangerous at even moderate voltages. Consider bleed resistors and always assume they are charged - so, use a safety shorting stick to check that they are discharged before servicing.
by Dennis P Brown
Sat Jan 14, 2017 4:37 pm
 
Forum: Ion Gun Design and Construction (& FAQs)
Topic: Plasmagun/railgun for Stelarate
Replies: 5
Views: 288

Re: Daniel Klasing- Plasma Club Application

... to my fusor; a real fusor supply (which you may have no interest in) is terribly lethal and having redundant grounds is both smart and a critical safety feature - especial with a metal support structure. Using just a ground through the power supply isn't the safest way to go; a master ground wire ...
by Dennis P Brown
Mon Jan 09, 2017 12:44 pm
 
Forum: Images du Jour
Topic: Daniel Klasing- Plasma Club Application
Replies: 3
Views: 179

Re: The Beginnings of a Fusor Electrical System

... places much more appropriate than fusor.net. It's even better if you can engage a live teacher/mentor face to face. In fact it's essential, for safety among other things. We get people here who should be sent away to learn basics. Here's one really good starter kit, with _no_ proprietary parts ...
by Rich Feldman
Tue Jan 03, 2017 10:51 pm
 
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: The Beginnings of a Fusor Electrical System
Replies: 23
Views: 641

Re: The Beginnings of a Fusor Electrical System

... the picture my guess is the two black wires that are cut on each coil both come from the same connection. Why are there two? Possibly redundancy safety on the grounding of the HV source. Now, let's think about the primary side coil(s). In pictures 2 and 3, there seem to be wires coming out of ...
by Rex Allers
Sat Dec 31, 2016 10:30 am
 
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: The Beginnings of a Fusor Electrical System
Replies: 23
Views: 641

Re: First Fusion for Liam David - Neutron Club Application

... By the way, I don't see a grounding connection from the ground stud of the spellman supply to the fusor shell, adding this will improve system safety(as the ground through the AC lines can sometimes be a little iffy) and possibly decrease the noise you are experiencing on the multimeters and ...
by Andrew Seltzman
Tue Dec 27, 2016 2:02 am
 
Forum: Images du Jour
Topic: First Fusion for Liam David - Neutron Club Application
Replies: 14
Views: 614

Getting -35Kv

... to just plug in and hook up. I do not learn anything that way (and even if I wanted to do that, I couldn't afford to do it). 2. For simplicity, safety reasons, and reasons having to do with knowledge, I am really leaning away from wanting to use a voltage multiplier. Due to these to reasons, ...
by Robert Dwyer
Tue Dec 06, 2016 5:21 am
 
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Getting -35Kv
Replies: 8
Views: 552

Re: Spellman DXM70N600X3547 power supplies on ebay -70kV 8.5

... through, let us say, a 150k ballast. 7ma x 150k = 1050 volts across the resistor...No big deal voltage wise. .007 X1050 = 7-10 watts a good safety margin would demand a 25 watt resistor (would just get warm) a 300k resistor would double that to about 50 watts. Such resistors are still sold. ...
by Richard Hull
Sat Dec 03, 2016 9:05 am
 
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Spellman DXM70N600X3547 power supplies on ebay -70kV 8.56MA
Replies: 132
Views: 4392

Re: Hello from Seattle

Welcome to the group. Read the FAQs and use the "New User Chat" area. Good luck!

Also, keep reading up on HV safety. No second chances.
by Andrew Robinson
Mon Nov 28, 2016 5:38 pm
 
Forum: Please Introduce Yourself
Topic: Hello from Seattle
Replies: 1
Views: 135

X-Ray Transformers

... @10-15mA. https://www.ebay.com/itm/172408126160 Do not purchase these transformers unless you are experienced with which voltage equipment and safety.
by Erik smith
Thu Nov 24, 2016 8:37 pm
 
Forum: The Trading Post
Topic: X-Ray Transformers
Replies: 0
Views: 210

Re: Spellman DXM70N600X3547 power supplies on ebay -70kV 8.5

... trip point, be the supply a home made switcher or a classic hard-nosed linear type. The human being is in total control and not some engineered safety trip point working in the micro-second or millisecond time frame to shut the entire thing down. The homebrew will take the burps and bumps and ...
by Richard Hull
Wed Nov 23, 2016 9:19 pm
 
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Spellman DXM70N600X3547 power supplies on ebay -70kV 8.56MA
Replies: 132
Views: 4392
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