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 #1030
Joined: Thu Sept 27 2007, 07:12PM
Location: Helsinki, Finland
Posts: 4
If you want the cheapest capacitors there is always homemade saltwater caps. They are a pretty poor choice but very cost effective. MMC's are the best choice for Tesla applications. I found that by placing 20-30Mohm resistors over the caps protect the caps pretty well. I made a bank of MMC's rated at 12kVDC at 0,1uF with only 24 caps! (6x4). I had my coil running about an hour feeding the coil with voltages between 8kV and 9kV without any problems.
Registered Member #1225
Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
I just need a good source of good capacitors to make an mmc out of. Today i am going to go look at polyethylene sheets in hopes that i can make a good capacitor with that. Bob golding gave me an offer i cant refuse,but i cannot make 100 buck fast so i would probably buy something else with the money...
Registered Member #1025
Joined: Sun Sept 23 2007, 07:53PM
Location: Czech Rep.
Posts: 566
In case you plan to make your own caps you can try this . The protocol is for 60KV rated cap, but you can decrease the amount of PP sheets to get higher capacitance and lower volatge rating...
Registered Member #1157
Joined: Thu Dec 06 2007, 12:11PM
Location: Houston, TX
Posts: 307
Hey bro, look at these.
Those are pretty darn cheap, and the only real expensive part is the mineral oil at like $13.00 bux a gallon.
I bought my mineral oil from Walgreen's for slightly more, but I didn't want to wait for it to come in the mail, oddly enough, I got the cups and foil there too. If you can rig up a vacuum pump, it takes the bubbles out lickety-split. The caps are pretty near bulletproof and easy to make. The guy that made em made em sloppy just to see what they'd do, and they worked like a charm for him.
When I made 'em, I took my time and actually sucked out the bubbles. I also put them in PVC pipe instead of a beef jerky container. They work, are cheap, and will do till you can get the good stuff.
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.
High voltage capacitors.
