Search found 534 matches: +voltage +safety

Searched query: +voltage +safety

by Richard Hull
Thu Jan 16, 2003 5:30 pm
Forum: FAQs: Neutron - Radiation Detection
Topic: FAQ - NEUTRON SAFETY
Replies: 19
Views: 18053

FAQ - NEUTRON SAFETY

... this very forum to view the numerous discussions on neutron and x-ray safety issues.<br/> <br/> This FAQ is an attempt to mollify the "chicken ... physics.<br/> <br/> Normal, simple amateur fusors, operating at lower voltages, rarely emit a total isotropic neutron count exceeding 100,000 neutrons ...
by Richard Hull
Mon Jan 13, 2003 9:31 pm
Forum: Vacuum Technology (& FAQs)
Topic: Thermocouple gauge voltage vs. pressure calibration
Replies: 6
Views: 2759

Re: Thermocouple gauge voltage vs. pressure calibration

... resistance. Thus throwing 97 ohms plus the tube's filament or heater in series with the battery, thereby drawing far less than the required 18ma. (safety)<br/> <br/> A vacuum is pulled on the tube and, hopefully, pulled to at or below one micron. The pot can now be adjusted down in resistance so ...
by 3l
Sat Jan 04, 2003 4:35 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: High Voltage Capacitor Safety :{
Replies: 0
Views: 1269

High Voltage Capacitor Safety :{

... rings chains ect.<br/> <br/> #3 Charge them up slowly<br/> increases the lifetime of the caps.<br/> By breaking them in by escallating the voltage in steps of say 100 volts<br/> Also any defect in the capacitor will<br/> malfunction with less juice (if you are lucky)<br/> <br/> #4 Don't ...
by guest
Sat Dec 07, 2002 3:33 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Beyond Dr. Milley ...Pulsed fusor #19
Replies: 19
Views: 3588

Beyond Dr. Milley ...Pulsed fusor #19

... are as follows:<br/> <br/> 1. How do you insulate this mess at higher voltage at the power supply level ?<br/> <br/> 2. Kilowatt discharges at ... are needed.<br/> The voltage is created and used up at the helix so safety is inherent even at zillions of volts.<br/> How big can you make it... ...
by guest
Wed Dec 04, 2002 7:46 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: 123 bang under glass..pulsed demo fusor
Replies: 4
Views: 2294

Re: 123 bang under glass..pulsed fusor-setup

... trani<br/> color tv trippler<br/> The resistor is across the cap for safety but in a run it would connect to the top of the fusor.<br/> Simply ... to ten kv... a minute or so.<br/> To discharge the cap simply apply voltage to the nst<br/> primary then when the trippler hits 45kv... pow!<br/> ...
by DaveC
Tue Nov 26, 2002 9:44 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: NEON SIGN TRANSFORMERS - TROUBLE OR GODSEND
Replies: 4
Views: 4796

Re: NEON SIGN TRANSFORMERS - TROUBLE OR GODSEND

... and thus stays relatively cool in operation.<br/> <br/> There is also a safety reason for the center tapped secondary.. When the arc has been struck in the sign tubing, the plasma voltage drops to only a couple hundred volts during each half cycle. By grounding the ...
by Richard Hull
Thu Nov 14, 2002 10:25 pm
Forum: Fusor Construction & Operation (& FAQs)
Topic: Grid
Replies: 13
Views: 3687

Re: Grid

... as your coolant. Such systems have been used in the past on super high voltage anode systems in vacuum tubes.<br/> <br/> Some hydrogen thyratron ... decks are used to allow for cascading in special systems. Engineers and safety officers don't like this, but in some instances it has to be done.<br/> ...
by DaveC
Wed Nov 06, 2002 7:32 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: safety/current limiting,ect?
Replies: 6
Views: 2716

Re: safety/current limiting,ect?

<t>Adding a fuse ahead of the circuit breaker is an excellent safety measure. <br/> <br/> One way you can control the output voltage of a Kenotron rectifier set, is to control the filament voltage. While filament control ...
by guest
Sun Nov 03, 2002 1:16 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: safety/current limiting,ect?
Replies: 6
Views: 2716

Re: safety/current limiting,ect?

hi doug
what dave says about the inductive limiting is true its ok for constant voltage but i would advise a fuse as well as a breaker as i have heard of breakers welding shut in high overcurrent so belt and braces would be good
cheers
colin
by DaveC
Sun Nov 03, 2002 8:26 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: safety/current limiting,ect?
Replies: 6
Views: 2716

Re: safety/current limiting,ect?

<t>Douglas - <br/> I would recommend use of a variac set to quite low voltage to check out your new transformer. I am presuming from your description, that this is just the transformer portion of the HV unit - 220 VAC input, and 125 kVAC RMS output, center ...