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 #293
Joined: Tue Mar 07 2006, 11:57AM
Location:
Posts: 10
I just ran across thes caps on ebay, has anyone had any experience with them? 0.33uF 2kV, High voltage Polypropylene Film Capacitor Item number: 160045870694 Best Regards, Davovinch
Registered Member #293
Joined: Tue Mar 07 2006, 11:57AM
Location:
Posts: 10
They are buy it now at 55 cents each with reasonable shipping. The seller is in china but does have a 100% rating. Take a look, I would post a shortcut but I don't know how.
Registered Member #146
Joined: Sun Feb 12 2006, 04:21AM
Location: Austin Tx
Posts: 1055
These are metalized film caps, which are lower current rating than a full film/foil construction.
What is your application?
I note that these capacitors are rather small given their values. I dont know if thats a good thing or bad thing (might mean they used a thinner dielectric, so that 2kV rating may not have much head room?).
Registered Member #293
Joined: Tue Mar 07 2006, 11:57AM
Location:
Posts: 10
Hi Steve, It's nice to hear from you. I just was looking at them, but if I was applying I would be using them in a TC. Sharp of you to notice that they are full metallised. I know Dan likes full met. caps but I have been sticking with the tried and true. I am right now trying to decipher all the info on SISG because it seemed that this would be a nice bridge for me into the solid state world since I basically got overwhelmed with DRSSTC. If you can, is there anything specific I should look for in a Microwave oven transformer, or are they all pretty much the same. Best Regards, Davovinch
Registered Member #146
Joined: Sun Feb 12 2006, 04:21AM
Location: Austin Tx
Posts: 1055
Perhaps you could start a thread in the Tesla Coil section with your questions? In attempts to keep the forums tidy, Moderators dont like when you get too far off topic.
To briefly answer your question, you will almost certainly want film/foil caps for a SISG, but DRSSTCs have a more unique position where the RMS currents are higher in relation to peak currents (meaning you need many parallel strings) so even metalized caps will work well. This is because both types have similar RMS current capability, but the foil caps have better Ipk ratings (usually around 2X for the same cap value).
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.
Some new poly caps
