Search found 147 matches

by bwsparxz
Sun Jul 05, 2020 1:01 am
Forum: Announcements and Site Administration Topics
Topic: HEAS 2020 the 31st year ????
Replies: 14
Views: 1538

Re: HEAS 2020 the 31st year ????

As much as I miss coming all these years and now in position to come this year I believe I'm gonna wait till next year. Especially since I have been exposed to Covid and waiting my test results. So Richard I'll just plan for 2021.
by bwsparxz
Fri Feb 06, 2009 4:29 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: VARIAC TO AC
Replies: 6
Views: 3621

Re: VARIAC TO AC

<t>Aware of how important circuit breakers are. Remember at Heas a few years ago, Richards x-ray transformer core saturated and tripped a 50 A breaker I think. The circuit breaker has been replaced by a solid state adjustable current sensor connected to a 240 vac contactor. It has a range of the cur...
by bwsparxz
Thu Jan 29, 2009 1:22 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: VARIAC TO AC
Replies: 6
Views: 3621

Re: VARIAC TO AC

<t>Good to hear as I already have a 240 V plug and recepticle and 240 V 50 A breaker in the breaker box and a 20 breaker to install on the output of the variac. What maximum should I expect of current draw? Here is a comparision of the 280 @ 25 A and a 140 V @10 A. Big difference is size and weight ...
by bwsparxz
Wed Jan 28, 2009 11:14 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: VARIAC TO AC
Replies: 6
Views: 3621

VARIAC TO AC

Have a 280 V @ 25 A variac to connect to my x-ray transformer. Was wondering which way to connect the AC. Carl has used a 240 V unit and used 120 V using the step effect to 240 V. Or should I connect the variac to 240 V. Even with 240 V did you still have 1 leg common?
by bwsparxz
Sun Jan 18, 2009 3:26 pm
Forum: Other Forms of Fusion - Theory, Construction, Discussion, URLs
Topic: Microwave Confinement
Replies: 13
Views: 4734

Microwave Confinement

Here is a site I found by a NCSU grad student on his microwave confinement project.

http://billrobinsonmusic.com/Physics.htm
by bwsparxz
Wed Nov 05, 2008 12:18 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Whats this red coil?
Replies: 16
Views: 5619

Re: Whats this red coil?

This is the HV ferrite transformer drive used by Spellman. It is or is very similar to a Series Resonance Load topology. Note the capacitors along with the red inductor chain.
by bwsparxz
Thu Oct 30, 2008 2:40 am
Forum: Interesting Links
Topic: Amateur Scientist Articles Online
Replies: 7
Views: 5055

Amateur Scientist Articles Online

<r>Seems to be all the Amateur Scientist articles online. I grew up with these, lots of great reference. <br/> <br/> <URL url="http://vacuum.ramapo.edu/physics/physics-doc/amsci/AmSci01/"><LINK_TEXT text="http://vacuum.ramapo.edu/physics/physic ... i/AmSci01/">http://vacuum.ramapo.edu/physics/physic...
by bwsparxz
Sun Oct 12, 2008 12:45 am
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: Final component selection
Replies: 2
Views: 2341

Final component selection

<t>I am evaluating my selection of components for my high voltage supply. Now have a 62.5 KV (-) xray transformer. Here is my ballast resistor: (2) parallelled 150 Kohm , 210 W resistors for a 75 Kohm , 210 W ballast. Is this TOO much? About close to what Richard Hull uses. For my HV divider: (1) 10...
by bwsparxz
Sun Oct 05, 2008 10:39 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: New X-Ray transformer
Replies: 2
Views: 3720

Re: New X-Ray transformer

The tank is full of clean , water-free oil. Which I discovered is 2/3 the weight of the 205 lbs. beast. The transformer seems to be well built with plenty of insulation. Need to find a cable with male federal plug and screw on ring. Plus a variac. Hope your conference went well Carl.
by bwsparxz
Sun Oct 05, 2008 9:41 pm
Forum: High Voltage - Fusor Input Power (& FAQs)
Topic: New X-Ray transformer
Replies: 2
Views: 3720

New X-Ray transformer

<r>While I hate missing HEAS this year (look forward to photos and reports) , I had the opportunity to obtain a xray trannie. Here is my 125 KV @ 300 mA Fischer xray power supply. <br/> Drove to pick it up in Memphis , Thanks to Carl Litton and The Memphis High Voltage Group. Also got to see some of...