If you need assistance, please send an email to forum at 4hv dot org. To ensure your email is not marked as spam, please include the phrase "4hv help" in the subject line. You can also find assistance via IRC, at irc.shadowworld.net, room #hvcomm.
Support 4hv.org!
Donate:
4hv.org is hosted on a dedicated server. Unfortunately, this server costs and we rely on the help of site members to keep 4hv.org running. Please consider donating. We will place your name on the thanks list and you'll be helping to keep 4hv.org alive and free for everyone. Members whose names appear in red bold have donated recently. Green bold denotes those who have recently donated to keep the server carbon neutral.
Special Thanks To:
Aaron Holmes
Aaron Wheeler
Adam Horden
Alan Scrimgeour
Andre
Andrew Haynes
Anonymous000
asabase
Austin Weil
barney
Barry
Bert Hickman
Bill Kukowski
Blitzorn
Brandon Paradelas
Bruce Bowling
BubeeMike
Byong Park
Cesiumsponge
Chris F.
Chris Hooper
Corey Worthington
Derek Woodroffe
Dalus
Dan Strother
Daniel Davis
Daniel Uhrenholt
datasheetarchive
Dave Billington
Dave Marshall
David F.
Dennis Rogers
drelectrix
Dr. John Gudenas
Dr. Spark
E.TexasTesla
eastvoltresearch
Eirik Taylor
Erik Dyakov
Erlend^SE
Finn Hammer
Firebug24k
GalliumMan
Gary Peterson
George Slade
GhostNull
Gordon Mcknight
Graham Armitage
Grant
GreySoul
Henry H
IamSmooth
In memory of Leo Powning
Jacob Cash
James Howells
James Pawson
Jeff Greenfield
Jeff Thomas
Jesse Frost
Jim Mitchell
jlr134
Joe Mastroianni
John Forcina
John Oberg
John Willcutt
Jon Newcomb
klugesmith
Leslie Wright
Lutz Hoffman
Mads Barnkob
Martin King
Mats Karlsson
Matt Gibson
Matthew Guidry
mbd
Michael D'Angelo
Mikkel
mileswaldron
mister_rf
Neil Foster
Nick de Smith
Nick Soroka
nicklenorp
Nik
Norman Stanley
Patrick Coleman
Paul Brodie
Paul Jordan
Paul Montgomery
Ped
Peter Krogen
Peter Terren
PhilGood
Richard Feldman
Robert Bush
Royce Bailey
Scott Fusare
Scott Newman
smiffy
Stella
Steven Busic
Steve Conner
Steve Jones
Steve Ward
Sulaiman
Thomas Coyle
Thomas A. Wallace
Thomas W
Timo
Torch
Ulf Jonsson
vasil
Vaxian
vladi mazzilli
wastehl
Weston
William Kim
William N.
William Stehl
Wesley Venis
The aforementioned have contributed financially to the continuing triumph of 4hv.org. They are deserving of my most heartfelt thanks.
Registered Member #1169
Joined: Wed Dec 12 2007, 09:16AM
Location: Portland OR
Posts: 251
This thread maybe a bit off topic, but has anyone pursued the idea of placing a large coil in a "low pressure" enclosure or at least the top load as a way to increase the arc length?
I am assuming there is a reason some of the worlds largest plasma globes are about on 12" in diameter (commercially available ones anyways)
Is it because the larger the volume the more difficult it is to create a below atmospheric pressures?
Registered Member #180
Joined: Thu Feb 16 2006, 02:12AM
Location: Ontario, Canada
Posts: 187
It has been done! I forget which site but I think it was extreme electronics? He put a coil or a marx gen in a big lexan box full or argon IIRC. I'll try and find the link. As far as I know there is no reason you couldn't do this on a large scale, other then cost.
*EDIT*
I was thinking of Mike's Electric Stuff but I can't seem to find it so maybe I was wrong.
Registered Member #1535
Joined: Wed Jun 11 2008, 11:37PM
Location: Northeastern Pennsylvania - USA
Posts: 117
I ran my DRSSTC arc through a 4 inch by 2 foot acrylic tube. Ends were capped, but not vacuum sealed. The 2 foot arcs were SO much quieter. I would assume it was because the arcs didn't have as much surrounding air to expand and contract. It was kinda neat, but the plastic got way to hot. I don't do that anymore...
Registered Member #1225
Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
It would be cool to put a whole Tesla coil into a box and try! But, i would think that in a vacuum it would get hotter, because of less air. Is that wrong?
You could just put the toroid in the glass or plastic, but that would make sealing a bit more difficult. I just think it would be funny to have a tiny Tesla coil completely inside a plasma globe :P. Not very practical though.
Registered Member #2099
Joined: Wed Apr 29 2009, 12:22AM
Location: Los Altos, California
Posts: 1716
Austin wrote ...
...I am assuming there is a reason some of the worlds largest plasma globes are about on 12" in diameter (commercially available ones anyways) ... Is it because the larger the volume the more difficult it is to create a below atmospheric pressures?
There are millions of CRT's with more volume than a 12" sphere. But consider the physical risks of a large glass vacuum container that you can see inside and put your hand on!
Thanks for picture of Tesla coil discharge in suction hose from refrigerant compressor. Can you give us its attribution?
This site is powered by e107, which is released under the GNU GPL License. All work on this site, except where otherwise noted, is licensed under a Creative Commons Attribution-ShareAlike 2.5 License. By submitting any information to this site, you agree that anything submitted will be so licensed. Please read our Disclaimer and Policies page for information on your rights and responsibilities regarding this site.
Tesla Coil Plasma Globe?
