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 #1656
Joined: Wed Aug 27 2008, 03:28PM
Location: Pittsburgh PA
Posts: 53
Hey all.
I recently came into ownership a bunch of capacitors. I have sorted them out the best I could.
500v disc caps, 73 of them. 100v axial caps. 60 of them. 400vdc axial caps. 78 of them. 200v axial type caps. 28 of them. 100v disc caps. 13 of them. 25v disc caps. 86 of them. And a whole bag of random caps. Also a bag of random high voltage caps.
I'm looking to either sell them (make an offer) or trade them for a couple decent flyback transformers.
If you are interested please PM me or send me an email.
Registered Member #1225
Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
Tigeris wrote ...
HazzWold1993 wrote ...
What sort of flybacks you after i have lots of AC flybacks, and a few DC
Looking for AC. Something to drive my Tesla coil.
AC flybacks are no good for Tesla coils. They'd have to be externally rectified, which would cost quite a bit to make a suitable rectifier. DC LOPT's will work well, but they won't last long in Tesla coil type circumstances.
If you use an ideally suited capacitor bank such as WIMA, or CDE, if you make the secondary right, and if you tune it right, you could get great sparks with a Flyback on ZVS driver.
100 watts is enough. If you run the LOPT at about 15 volts into a ZVS driver and get it to pull around 7 amps, you would probably get 20Kv and enough current for a 5nf or so cap bank. Also, use a rotary spark gap if you can. A string of high voltage MOVs, a power resistor, and some RF bypass capacitor would ensure the LOPT lasts long enough to make plenty sparks.
I cannot guarantee my LOPTs health, but i will test them at some very high voltage to prove they are good... If you'd like, i can include 2 650pf 20kvdc doorknob caps... If you series them, they will greatly help with RF kickback. Then just get something like a 20 watt wirewound resistor at a few Kohms, and a safety gap (and hopefully some MOVs) and they'll last. Don't attempt to use these capacitors as a tank cap. They are high current rated, but not pulse. They work great for vttc tank caps.
Registered Member #1656
Joined: Wed Aug 27 2008, 03:28PM
Location: Pittsburgh PA
Posts: 53
Arcstarter wrote ...
Tigeris wrote ...
HazzWold1993 wrote ...
What sort of flybacks you after i have lots of AC flybacks, and a few DC
Looking for AC. Something to drive my Tesla coil.
AC flybacks are no good for Tesla coils. They'd have to be externally rectified, which would cost quite a bit to make a suitable rectifier. DC LOPT's will work well, but they won't last long in Tesla coil type circumstances.
If you use an ideally suited capacitor bank such as WIMA, or CDE, if you make the secondary right, and if you tune it right, you could get great sparks with a Flyback on ZVS driver.
100 watts is enough. If you run the LOPT at about 15 volts into a ZVS driver and get it to pull around 7 amps, you would probably get 20Kv and enough current for a 5nf or so cap bank. Also, use a rotary spark gap if you can. A string of high voltage MOVs, a power resistor, and some RF bypass capacitor would ensure the LOPT lasts long enough to make plenty sparks.
I cannot guarantee my LOPTs health, but i will test them at some very high voltage to prove they are good... If you'd like, i can include 2 650pf 20kvdc doorknob caps... If you series them, they will greatly help with RF kickback. Then just get something like a 20 watt wirewound resistor at a few Kohms, and a safety gap (and hopefully some MOVs) and they'll last. Don't attempt to use these capacitors as a tank cap. They are high current rated, but not pulse. They work great for vttc tank caps.
Gah. Thats what I meant to say. DC. I have most of the set up done, just need a new LOPT. Though one of them will be used to power a series of plasma balls. :P
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.
Massive capactior lot
